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cobalt / cobalt / 25902c6cb1ab9cfd8ae2ee6b0fb52953f73deda5 / . / third_party / perfetto / buildtools / sqlite_src / src / sqliteInt.h
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/*
** 2001 September 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
*/
#ifndef SQLITEINT_H
#define SQLITEINT_H
/* Special Comments:
**
** Some comments have special meaning to the tools that measure test
** coverage:
**
** NO_TEST - The branches on this line are not
** measured by branch coverage. This is
** used on lines of code that actually
** implement parts of coverage testing.
**
** OPTIMIZATION-IF-TRUE - This branch is allowed to alway be false
** and the correct answer is still obtained,
** though perhaps more slowly.
**
** OPTIMIZATION-IF-FALSE - This branch is allowed to alway be true
** and the correct answer is still obtained,
** though perhaps more slowly.
**
** PREVENTS-HARMLESS-OVERREAD - This branch prevents a buffer overread
** that would be harmless and undetectable
** if it did occur.
**
** In all cases, the special comment must be enclosed in the usual
** slash-asterisk...asterisk-slash comment marks, with no spaces between the
** asterisks and the comment text.
*/
/*
** Make sure the Tcl calling convention macro is defined. This macro is
** only used by test code and Tcl integration code.
*/
#ifndef SQLITE_TCLAPI
# define SQLITE_TCLAPI
#endif
/*
** Include the header file used to customize the compiler options for MSVC.
** This should be done first so that it can successfully prevent spurious
** compiler warnings due to subsequent content in this file and other files
** that are included by this file.
*/
#include "msvc.h"
/*
** Special setup for VxWorks
*/
#include "vxworks.h"
/*
** These #defines should enable >2GB file support on POSIX if the
** underlying operating system supports it. If the OS lacks
** large file support, or if the OS is windows, these should be no-ops.
**
** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any
** system #includes. Hence, this block of code must be the very first
** code in all source files.
**
** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
** on the compiler command line. This is necessary if you are compiling
** on a recent machine (ex: Red Hat 7.2) but you want your code to work
** on an older machine (ex: Red Hat 6.0). If you compile on Red Hat 7.2
** without this option, LFS is enable. But LFS does not exist in the kernel
** in Red Hat 6.0, so the code won't work. Hence, for maximum binary
** portability you should omit LFS.
**
** The previous paragraph was written in 2005. (This paragraph is written
** on 2008-11-28.) These days, all Linux kernels support large files, so
** you should probably leave LFS enabled. But some embedded platforms might
** lack LFS in which case the SQLITE_DISABLE_LFS macro might still be useful.
**
** Similar is true for Mac OS X. LFS is only supported on Mac OS X 9 and later.
*/
#ifndef SQLITE_DISABLE_LFS
# define _LARGE_FILE 1
# ifndef _FILE_OFFSET_BITS
# define _FILE_OFFSET_BITS 64
# endif
# define _LARGEFILE_SOURCE 1
#endif
/* The GCC_VERSION and MSVC_VERSION macros are used to
** conditionally include optimizations for each of these compilers. A
** value of 0 means that compiler is not being used. The
** SQLITE_DISABLE_INTRINSIC macro means do not use any compiler-specific
** optimizations, and hence set all compiler macros to 0
**
** There was once also a CLANG_VERSION macro. However, we learn that the
** version numbers in clang are for "marketing" only and are inconsistent
** and unreliable. Fortunately, all versions of clang also recognize the
** gcc version numbers and have reasonable settings for gcc version numbers,
** so the GCC_VERSION macro will be set to a correct non-zero value even
** when compiling with clang.
*/
#if defined(__GNUC__) && !defined(SQLITE_DISABLE_INTRINSIC)
# define GCC_VERSION (__GNUC__*1000000+__GNUC_MINOR__*1000+__GNUC_PATCHLEVEL__)
#else
# define GCC_VERSION 0
#endif
#if defined(_MSC_VER) && !defined(SQLITE_DISABLE_INTRINSIC)
# define MSVC_VERSION _MSC_VER
#else
# define MSVC_VERSION 0
#endif
/*
** Some C99 functions in "math.h" are only present for MSVC when its version
** is associated with Visual Studio 2013 or higher.
*/
#ifndef SQLITE_HAVE_C99_MATH_FUNCS
# if MSVC_VERSION==0 || MSVC_VERSION>=1800
# define SQLITE_HAVE_C99_MATH_FUNCS (1)
# else
# define SQLITE_HAVE_C99_MATH_FUNCS (0)
# endif
#endif
/* Needed for various definitions... */
#if defined(__GNUC__) && !defined(_GNU_SOURCE)
# define _GNU_SOURCE
#endif
#if defined(__OpenBSD__) && !defined(_BSD_SOURCE)
# define _BSD_SOURCE
#endif
/*
** Macro to disable warnings about missing "break" at the end of a "case".
*/
#if GCC_VERSION>=7000000
# define deliberate_fall_through __attribute__((fallthrough));
#else
# define deliberate_fall_through
#endif
/*
** For MinGW, check to see if we can include the header file containing its
** version information, among other things. Normally, this internal MinGW
** header file would [only] be included automatically by other MinGW header
** files; however, the contained version information is now required by this
** header file to work around binary compatibility issues (see below) and
** this is the only known way to reliably obtain it. This entire #if block
** would be completely unnecessary if there was any other way of detecting
** MinGW via their preprocessor (e.g. if they customized their GCC to define
** some MinGW-specific macros). When compiling for MinGW, either the
** _HAVE_MINGW_H or _HAVE__MINGW_H (note the extra underscore) macro must be
** defined; otherwise, detection of conditions specific to MinGW will be
** disabled.
*/
#if defined(_HAVE_MINGW_H)
# include "mingw.h"
#elif defined(_HAVE__MINGW_H)
# include "_mingw.h"
#endif
/*
** For MinGW version 4.x (and higher), check to see if the _USE_32BIT_TIME_T
** define is required to maintain binary compatibility with the MSVC runtime
** library in use (e.g. for Windows XP).
*/
#if !defined(_USE_32BIT_TIME_T) && !defined(_USE_64BIT_TIME_T) && \
defined(_WIN32) && !defined(_WIN64) && \
defined(__MINGW_MAJOR_VERSION) && __MINGW_MAJOR_VERSION >= 4 && \
defined(__MSVCRT__)
# define _USE_32BIT_TIME_T
#endif
/* Optionally #include a user-defined header, whereby compilation options
** may be set prior to where they take effect, but after platform setup.
** If SQLITE_CUSTOM_INCLUDE=? is defined, its value names the #include
** file.
*/
#ifdef SQLITE_CUSTOM_INCLUDE
# define INC_STRINGIFY_(f) #f
# define INC_STRINGIFY(f) INC_STRINGIFY_(f)
# include INC_STRINGIFY(SQLITE_CUSTOM_INCLUDE)
#endif
/* The public SQLite interface. The _FILE_OFFSET_BITS macro must appear
** first in QNX. Also, the _USE_32BIT_TIME_T macro must appear first for
** MinGW.
*/
#include "sqlite3.h"
/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H)
#include "config.h"
#define SQLITECONFIG_H 1
#endif
#include "sqliteLimit.h"
/* Disable nuisance warnings on Borland compilers */
#if defined(__BORLANDC__)
#pragma warn -rch /* unreachable code */
#pragma warn -ccc /* Condition is always true or false */
#pragma warn -aus /* Assigned value is never used */
#pragma warn -csu /* Comparing signed and unsigned */
#pragma warn -spa /* Suspicious pointer arithmetic */
#endif
/*
** WAL mode depends on atomic aligned 32-bit loads and stores in a few
** places. The following macros try to make this explicit.
*/
#ifndef __has_extension
# define __has_extension(x) 0 /* compatibility with non-clang compilers */
#endif
#if GCC_VERSION>=4007000 || __has_extension(c_atomic)
# define SQLITE_ATOMIC_INTRINSICS 1
# define AtomicLoad(PTR) __atomic_load_n((PTR),__ATOMIC_RELAXED)
# define AtomicStore(PTR,VAL) __atomic_store_n((PTR),(VAL),__ATOMIC_RELAXED)
#else
# define SQLITE_ATOMIC_INTRINSICS 0
# define AtomicLoad(PTR) (*(PTR))
# define AtomicStore(PTR,VAL) (*(PTR) = (VAL))
#endif
/*
** Include standard header files as necessary
*/
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
/*
** The following macros are used to cast pointers to integers and
** integers to pointers. The way you do this varies from one compiler
** to the next, so we have developed the following set of #if statements
** to generate appropriate macros for a wide range of compilers.
**
** The correct "ANSI" way to do this is to use the intptr_t type.
** Unfortunately, that typedef is not available on all compilers, or
** if it is available, it requires an #include of specific headers
** that vary from one machine to the next.
**
** Ticket #3860: The llvm-gcc-4.2 compiler from Apple chokes on
** the ((void*)&((char*)0)[X]) construct. But MSVC chokes on ((void*)(X)).
** So we have to define the macros in different ways depending on the
** compiler.
*/
#if defined(HAVE_STDINT_H) /* Use this case if we have ANSI headers */
# define SQLITE_INT_TO_PTR(X) ((void*)(intptr_t)(X))
# define SQLITE_PTR_TO_INT(X) ((int)(intptr_t)(X))
#elif defined(__PTRDIFF_TYPE__) /* This case should work for GCC */
# define SQLITE_INT_TO_PTR(X) ((void*)(__PTRDIFF_TYPE__)(X))
# define SQLITE_PTR_TO_INT(X) ((int)(__PTRDIFF_TYPE__)(X))
#elif !defined(__GNUC__) /* Works for compilers other than LLVM */
# define SQLITE_INT_TO_PTR(X) ((void*)&((char*)0)[X])
# define SQLITE_PTR_TO_INT(X) ((int)(((char*)X)-(char*)0))
#else /* Generates a warning - but it always works */
# define SQLITE_INT_TO_PTR(X) ((void*)(X))
# define SQLITE_PTR_TO_INT(X) ((int)(X))
#endif
/*
** A macro to hint to the compiler that a function should not be
** inlined.
*/
#if defined(__GNUC__)
# define SQLITE_NOINLINE __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
# define SQLITE_NOINLINE __declspec(noinline)
#else
# define SQLITE_NOINLINE
#endif
/*
** Make sure that the compiler intrinsics we desire are enabled when
** compiling with an appropriate version of MSVC unless prevented by
** the SQLITE_DISABLE_INTRINSIC define.
*/
#if !defined(SQLITE_DISABLE_INTRINSIC)
# if defined(_MSC_VER) && _MSC_VER>=1400
# if !defined(_WIN32_WCE)
# include <intrin.h>
# pragma intrinsic(_byteswap_ushort)
# pragma intrinsic(_byteswap_ulong)
# pragma intrinsic(_byteswap_uint64)
# pragma intrinsic(_ReadWriteBarrier)
# else
# include <cmnintrin.h>
# endif
# endif
#endif
/*
** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2.
** 0 means mutexes are permanently disable and the library is never
** threadsafe. 1 means the library is serialized which is the highest
** level of threadsafety. 2 means the library is multithreaded - multiple
** threads can use SQLite as long as no two threads try to use the same
** database connection at the same time.
**
** Older versions of SQLite used an optional THREADSAFE macro.
** We support that for legacy.
**
** To ensure that the correct value of "THREADSAFE" is reported when querying
** for compile-time options at runtime (e.g. "PRAGMA compile_options"), this
** logic is partially replicated in ctime.c. If it is updated here, it should
** also be updated there.
*/
#if !defined(SQLITE_THREADSAFE)
# if defined(THREADSAFE)
# define SQLITE_THREADSAFE THREADSAFE
# else
# define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */
# endif
#endif
/*
** Powersafe overwrite is on by default. But can be turned off using
** the -DSQLITE_POWERSAFE_OVERWRITE=0 command-line option.
*/
#ifndef SQLITE_POWERSAFE_OVERWRITE
# define SQLITE_POWERSAFE_OVERWRITE 1
#endif
/*
** EVIDENCE-OF: R-25715-37072 Memory allocation statistics are enabled by
** default unless SQLite is compiled with SQLITE_DEFAULT_MEMSTATUS=0 in
** which case memory allocation statistics are disabled by default.
*/
#if !defined(SQLITE_DEFAULT_MEMSTATUS)
# define SQLITE_DEFAULT_MEMSTATUS 1
#endif
/*
** Exactly one of the following macros must be defined in order to
** specify which memory allocation subsystem to use.
**
** SQLITE_SYSTEM_MALLOC // Use normal system malloc()
** SQLITE_WIN32_MALLOC // Use Win32 native heap API
** SQLITE_ZERO_MALLOC // Use a stub allocator that always fails
** SQLITE_MEMDEBUG // Debugging version of system malloc()
**
** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the
** assert() macro is enabled, each call into the Win32 native heap subsystem
** will cause HeapValidate to be called. If heap validation should fail, an
** assertion will be triggered.
**
** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as
** the default.
*/
#if defined(SQLITE_SYSTEM_MALLOC) \
+ defined(SQLITE_WIN32_MALLOC) \
+ defined(SQLITE_ZERO_MALLOC) \
+ defined(SQLITE_MEMDEBUG)>1
# error "Two or more of the following compile-time configuration options\
are defined but at most one is allowed:\
SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG,\
SQLITE_ZERO_MALLOC"
#endif
#if defined(SQLITE_SYSTEM_MALLOC) \
+ defined(SQLITE_WIN32_MALLOC) \
+ defined(SQLITE_ZERO_MALLOC) \
+ defined(SQLITE_MEMDEBUG)==0
# define SQLITE_SYSTEM_MALLOC 1
#endif
/*
** If SQLITE_MALLOC_SOFT_LIMIT is not zero, then try to keep the
** sizes of memory allocations below this value where possible.
*/
#if !defined(SQLITE_MALLOC_SOFT_LIMIT)
# define SQLITE_MALLOC_SOFT_LIMIT 1024
#endif
/*
** We need to define _XOPEN_SOURCE as follows in order to enable
** recursive mutexes on most Unix systems and fchmod() on OpenBSD.
** But _XOPEN_SOURCE define causes problems for Mac OS X, so omit
** it.
*/
#if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__)
# define _XOPEN_SOURCE 600
#endif
/*
** NDEBUG and SQLITE_DEBUG are opposites. It should always be true that
** defined(NDEBUG)==!defined(SQLITE_DEBUG). If this is not currently true,
** make it true by defining or undefining NDEBUG.
**
** Setting NDEBUG makes the code smaller and faster by disabling the
** assert() statements in the code. So we want the default action
** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG
** is set. Thus NDEBUG becomes an opt-in rather than an opt-out
** feature.
*/
#if !defined(NDEBUG) && !defined(SQLITE_DEBUG)
# define NDEBUG 1
#endif
#if defined(NDEBUG) && defined(SQLITE_DEBUG)
# undef NDEBUG
#endif
/*
** Enable SQLITE_ENABLE_EXPLAIN_COMMENTS if SQLITE_DEBUG is turned on.
*/
#if !defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) && defined(SQLITE_DEBUG)
# define SQLITE_ENABLE_EXPLAIN_COMMENTS 1
#endif
/*
** The testcase() macro is used to aid in coverage testing. When
** doing coverage testing, the condition inside the argument to
** testcase() must be evaluated both true and false in order to
** get full branch coverage. The testcase() macro is inserted
** to help ensure adequate test coverage in places where simple
** condition/decision coverage is inadequate. For example, testcase()
** can be used to make sure boundary values are tested. For
** bitmask tests, testcase() can be used to make sure each bit
** is significant and used at least once. On switch statements
** where multiple cases go to the same block of code, testcase()
** can insure that all cases are evaluated.
*/
#if defined(SQLITE_COVERAGE_TEST) || defined(SQLITE_DEBUG)
# ifndef SQLITE_AMALGAMATION
extern unsigned int sqlite3CoverageCounter;
# endif
# define testcase(X) if( X ){ sqlite3CoverageCounter += (unsigned)__LINE__; }
#else
# define testcase(X)
#endif
/*
** The TESTONLY macro is used to enclose variable declarations or
** other bits of code that are needed to support the arguments
** within testcase() and assert() macros.
*/
#if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST)
# define TESTONLY(X) X
#else
# define TESTONLY(X)
#endif
/*
** Sometimes we need a small amount of code such as a variable initialization
** to setup for a later assert() statement. We do not want this code to
** appear when assert() is disabled. The following macro is therefore
** used to contain that setup code. The "VVA" acronym stands for
** "Verification, Validation, and Accreditation". In other words, the
** code within VVA_ONLY() will only run during verification processes.
*/
#ifndef NDEBUG
# define VVA_ONLY(X) X
#else
# define VVA_ONLY(X)
#endif
/*
** Disable ALWAYS() and NEVER() (make them pass-throughs) for coverage
** and mutation testing
*/
#if defined(SQLITE_COVERAGE_TEST) || defined(SQLITE_MUTATION_TEST)
# define SQLITE_OMIT_AUXILIARY_SAFETY_CHECKS 1
#endif
/*
** The ALWAYS and NEVER macros surround boolean expressions which
** are intended to always be true or false, respectively. Such
** expressions could be omitted from the code completely. But they
** are included in a few cases in order to enhance the resilience
** of SQLite to unexpected behavior - to make the code "self-healing"
** or "ductile" rather than being "brittle" and crashing at the first
** hint of unplanned behavior.
**
** In other words, ALWAYS and NEVER are added for defensive code.
**
** When doing coverage testing ALWAYS and NEVER are hard-coded to
** be true and false so that the unreachable code they specify will
** not be counted as untested code.
*/
#if defined(SQLITE_OMIT_AUXILIARY_SAFETY_CHECKS)
# define ALWAYS(X) (1)
# define NEVER(X) (0)
#elif !defined(NDEBUG)
# define ALWAYS(X) ((X)?1:(assert(0),0))
# define NEVER(X) ((X)?(assert(0),1):0)
#else
# define ALWAYS(X) (X)
# define NEVER(X) (X)
#endif
/*
** Some conditionals are optimizations only. In other words, if the
** conditionals are replaced with a constant 1 (true) or 0 (false) then
** the correct answer is still obtained, though perhaps not as quickly.
**
** The following macros mark these optimizations conditionals.
*/
#if defined(SQLITE_MUTATION_TEST)
# define OK_IF_ALWAYS_TRUE(X) (1)
# define OK_IF_ALWAYS_FALSE(X) (0)
#else
# define OK_IF_ALWAYS_TRUE(X) (X)
# define OK_IF_ALWAYS_FALSE(X) (X)
#endif
/*
** Some malloc failures are only possible if SQLITE_TEST_REALLOC_STRESS is
** defined. We need to defend against those failures when testing with
** SQLITE_TEST_REALLOC_STRESS, but we don't want the unreachable branches
** during a normal build. The following macro can be used to disable tests
** that are always false except when SQLITE_TEST_REALLOC_STRESS is set.
*/
#if defined(SQLITE_TEST_REALLOC_STRESS)
# define ONLY_IF_REALLOC_STRESS(X) (X)
#elif !defined(NDEBUG)
# define ONLY_IF_REALLOC_STRESS(X) ((X)?(assert(0),1):0)
#else
# define ONLY_IF_REALLOC_STRESS(X) (0)
#endif
/*
** Declarations used for tracing the operating system interfaces.
*/
#if defined(SQLITE_FORCE_OS_TRACE) || defined(SQLITE_TEST) || \
(defined(SQLITE_DEBUG) && SQLITE_OS_WIN)
extern int sqlite3OSTrace;
# define OSTRACE(X) if( sqlite3OSTrace ) sqlite3DebugPrintf X
# define SQLITE_HAVE_OS_TRACE
#else
# define OSTRACE(X)
# undef SQLITE_HAVE_OS_TRACE
#endif
/*
** Is the sqlite3ErrName() function needed in the build? Currently,
** it is needed by "mutex_w32.c" (when debugging), "os_win.c" (when
** OSTRACE is enabled), and by several "test*.c" files (which are
** compiled using SQLITE_TEST).
*/
#if defined(SQLITE_HAVE_OS_TRACE) || defined(SQLITE_TEST) || \
(defined(SQLITE_DEBUG) && SQLITE_OS_WIN)
# define SQLITE_NEED_ERR_NAME
#else
# undef SQLITE_NEED_ERR_NAME
#endif
/*
** SQLITE_ENABLE_EXPLAIN_COMMENTS is incompatible with SQLITE_OMIT_EXPLAIN
*/
#ifdef SQLITE_OMIT_EXPLAIN
# undef SQLITE_ENABLE_EXPLAIN_COMMENTS
#endif
/*
** SQLITE_OMIT_VIRTUALTABLE implies SQLITE_OMIT_ALTERTABLE
*/
#if defined(SQLITE_OMIT_VIRTUALTABLE) && !defined(SQLITE_OMIT_ALTERTABLE)
# define SQLITE_OMIT_ALTERTABLE
#endif
/*
** Return true (non-zero) if the input is an integer that is too large
** to fit in 32-bits. This macro is used inside of various testcase()
** macros to verify that we have tested SQLite for large-file support.
*/
#define IS_BIG_INT(X) (((X)&~(i64)0xffffffff)!=0)
/*
** The macro unlikely() is a hint that surrounds a boolean
** expression that is usually false. Macro likely() surrounds
** a boolean expression that is usually true. These hints could,
** in theory, be used by the compiler to generate better code, but
** currently they are just comments for human readers.
*/
#define likely(X) (X)
#define unlikely(X) (X)
#include "hash.h"
#include "parse.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stddef.h>
/*
** Use a macro to replace memcpy() if compiled with SQLITE_INLINE_MEMCPY.
** This allows better measurements of where memcpy() is used when running
** cachegrind. But this macro version of memcpy() is very slow so it
** should not be used in production. This is a performance measurement
** hack only.
*/
#ifdef SQLITE_INLINE_MEMCPY
# define memcpy(D,S,N) {char*xxd=(char*)(D);const char*xxs=(const char*)(S);\
int xxn=(N);while(xxn-->0)*(xxd++)=*(xxs++);}
#endif
/*
** If compiling for a processor that lacks floating point support,
** substitute integer for floating-point
*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite_int64
# define float sqlite_int64
# define LONGDOUBLE_TYPE sqlite_int64
# ifndef SQLITE_BIG_DBL
# define SQLITE_BIG_DBL (((sqlite3_int64)1)<<50)
# endif
# define SQLITE_OMIT_DATETIME_FUNCS 1
# define SQLITE_OMIT_TRACE 1
# undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT
# undef SQLITE_HAVE_ISNAN
#endif
#ifndef SQLITE_BIG_DBL
# define SQLITE_BIG_DBL (1e99)
#endif
/*
** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0
** afterward. Having this macro allows us to cause the C compiler
** to omit code used by TEMP tables without messy #ifndef statements.
*/
#ifdef SQLITE_OMIT_TEMPDB
#define OMIT_TEMPDB 1
#else
#define OMIT_TEMPDB 0
#endif
/*
** The "file format" number is an integer that is incremented whenever
** the VDBE-level file format changes. The following macros define the
** the default file format for new databases and the maximum file format
** that the library can read.
*/
#define SQLITE_MAX_FILE_FORMAT 4
#ifndef SQLITE_DEFAULT_FILE_FORMAT
# define SQLITE_DEFAULT_FILE_FORMAT 4
#endif
/*
** Determine whether triggers are recursive by default. This can be
** changed at run-time using a pragma.
*/
#ifndef SQLITE_DEFAULT_RECURSIVE_TRIGGERS
# define SQLITE_DEFAULT_RECURSIVE_TRIGGERS 0
#endif
/*
** Provide a default value for SQLITE_TEMP_STORE in case it is not specified
** on the command-line
*/
#ifndef SQLITE_TEMP_STORE
# define SQLITE_TEMP_STORE 1
#endif
/*
** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if
** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it
** to zero.
*/
#if SQLITE_TEMP_STORE==3 || SQLITE_THREADSAFE==0
# undef SQLITE_MAX_WORKER_THREADS
# define SQLITE_MAX_WORKER_THREADS 0
#endif
#ifndef SQLITE_MAX_WORKER_THREADS
# define SQLITE_MAX_WORKER_THREADS 8
#endif
#ifndef SQLITE_DEFAULT_WORKER_THREADS
# define SQLITE_DEFAULT_WORKER_THREADS 0
#endif
#if SQLITE_DEFAULT_WORKER_THREADS>SQLITE_MAX_WORKER_THREADS
# undef SQLITE_MAX_WORKER_THREADS
# define SQLITE_MAX_WORKER_THREADS SQLITE_DEFAULT_WORKER_THREADS
#endif
/*
** The default initial allocation for the pagecache when using separate
** pagecaches for each database connection. A positive number is the
** number of pages. A negative number N translations means that a buffer
** of -1024*N bytes is allocated and used for as many pages as it will hold.
**
** The default value of "20" was chosen to minimize the run-time of the
** speedtest1 test program with options: --shrink-memory --reprepare
*/
#ifndef SQLITE_DEFAULT_PCACHE_INITSZ
# define SQLITE_DEFAULT_PCACHE_INITSZ 20
#endif
/*
** Default value for the SQLITE_CONFIG_SORTERREF_SIZE option.
*/
#ifndef SQLITE_DEFAULT_SORTERREF_SIZE
# define SQLITE_DEFAULT_SORTERREF_SIZE 0x7fffffff
#endif
/*
** The compile-time options SQLITE_MMAP_READWRITE and
** SQLITE_ENABLE_BATCH_ATOMIC_WRITE are not compatible with one another.
** You must choose one or the other (or neither) but not both.
*/
#if defined(SQLITE_MMAP_READWRITE) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
#error Cannot use both SQLITE_MMAP_READWRITE and SQLITE_ENABLE_BATCH_ATOMIC_WRITE
#endif
/*
** GCC does not define the offsetof() macro so we'll have to do it
** ourselves.
*/
#ifndef offsetof
#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
#endif
/*
** Macros to compute minimum and maximum of two numbers.
*/
#ifndef MIN
# define MIN(A,B) ((A)<(B)?(A):(B))
#endif
#ifndef MAX
# define MAX(A,B) ((A)>(B)?(A):(B))
#endif
/*
** Swap two objects of type TYPE.
*/
#define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;}
/*
** Check to see if this machine uses EBCDIC. (Yes, believe it or
** not, there are still machines out there that use EBCDIC.)
*/
#if 'A' == '\301'
# define SQLITE_EBCDIC 1
#else
# define SQLITE_ASCII 1
#endif
/*
** Integers of known sizes. These typedefs might change for architectures
** where the sizes very. Preprocessor macros are available so that the
** types can be conveniently redefined at compile-type. Like this:
**
** cc '-DUINTPTR_TYPE=long long int' ...
*/
#ifndef UINT32_TYPE
# ifdef HAVE_UINT32_T
# define UINT32_TYPE uint32_t
# else
# define UINT32_TYPE unsigned int
# endif
#endif
#ifndef UINT16_TYPE
# ifdef HAVE_UINT16_T
# define UINT16_TYPE uint16_t
# else
# define UINT16_TYPE unsigned short int
# endif
#endif
#ifndef INT16_TYPE
# ifdef HAVE_INT16_T
# define INT16_TYPE int16_t
# else
# define INT16_TYPE short int
# endif
#endif
#ifndef UINT8_TYPE
# ifdef HAVE_UINT8_T
# define UINT8_TYPE uint8_t
# else
# define UINT8_TYPE unsigned char
# endif
#endif
#ifndef INT8_TYPE
# ifdef HAVE_INT8_T
# define INT8_TYPE int8_t
# else
# define INT8_TYPE signed char
# endif
#endif
#ifndef LONGDOUBLE_TYPE
# define LONGDOUBLE_TYPE long double
#endif
typedef sqlite_int64 i64; /* 8-byte signed integer */
typedef sqlite_uint64 u64; /* 8-byte unsigned integer */
typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
typedef INT16_TYPE i16; /* 2-byte signed integer */
typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
typedef INT8_TYPE i8; /* 1-byte signed integer */
/*
** SQLITE_MAX_U32 is a u64 constant that is the maximum u64 value
** that can be stored in a u32 without loss of data. The value
** is 0x00000000ffffffff. But because of quirks of some compilers, we
** have to specify the value in the less intuitive manner shown:
*/
#define SQLITE_MAX_U32 ((((u64)1)<<32)-1)
/*
** The datatype used to store estimates of the number of rows in a
** table or index. This is an unsigned integer type. For 99.9% of
** the world, a 32-bit integer is sufficient. But a 64-bit integer
** can be used at compile-time if desired.
*/
#ifdef SQLITE_64BIT_STATS
typedef u64 tRowcnt; /* 64-bit only if requested at compile-time */
#else
typedef u32 tRowcnt; /* 32-bit is the default */
#endif
/*
** Estimated quantities used for query planning are stored as 16-bit
** logarithms. For quantity X, the value stored is 10*log2(X). This
** gives a possible range of values of approximately 1.0e986 to 1e-986.
** But the allowed values are "grainy". Not every value is representable.
** For example, quantities 16 and 17 are both represented by a LogEst
** of 40. However, since LogEst quantities are suppose to be estimates,
** not exact values, this imprecision is not a problem.
**
** "LogEst" is short for "Logarithmic Estimate".
**
** Examples:
** 1 -> 0 20 -> 43 10000 -> 132
** 2 -> 10 25 -> 46 25000 -> 146
** 3 -> 16 100 -> 66 1000000 -> 199
** 4 -> 20 1000 -> 99 1048576 -> 200
** 10 -> 33 1024 -> 100 4294967296 -> 320
**
** The LogEst can be negative to indicate fractional values.
** Examples:
**
** 0.5 -> -10 0.1 -> -33 0.0625 -> -40
*/
typedef INT16_TYPE LogEst;
/*
** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer
*/
#ifndef SQLITE_PTRSIZE
# if defined(__SIZEOF_POINTER__)
# define SQLITE_PTRSIZE __SIZEOF_POINTER__
# elif defined(i386) || defined(__i386__) || defined(_M_IX86) || \
defined(_M_ARM) || defined(__arm__) || defined(__x86) || \
(defined(__APPLE__) && defined(__POWERPC__)) || \
(defined(__TOS_AIX__) && !defined(__64BIT__))
# define SQLITE_PTRSIZE 4
# else
# define SQLITE_PTRSIZE 8
# endif
#endif
/* The uptr type is an unsigned integer large enough to hold a pointer
*/
#if defined(HAVE_STDINT_H)
typedef uintptr_t uptr;
#elif SQLITE_PTRSIZE==4
typedef u32 uptr;
#else
typedef u64 uptr;
#endif
/*
** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to
** something between S (inclusive) and E (exclusive).
**
** In other words, S is a buffer and E is a pointer to the first byte after
** the end of buffer S. This macro returns true if P points to something
** contained within the buffer S.
*/
#define SQLITE_WITHIN(P,S,E) (((uptr)(P)>=(uptr)(S))&&((uptr)(P)<(uptr)(E)))
/*
** Macros to determine whether the machine is big or little endian,
** and whether or not that determination is run-time or compile-time.
**
** For best performance, an attempt is made to guess at the byte-order
** using C-preprocessor macros. If that is unsuccessful, or if
** -DSQLITE_BYTEORDER=0 is set, then byte-order is determined
** at run-time.
*/
#ifndef SQLITE_BYTEORDER
# if defined(i386) || defined(__i386__) || defined(_M_IX86) || \
defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || \
defined(_M_AMD64) || defined(_M_ARM) || defined(__x86) || \
defined(__ARMEL__) || defined(__AARCH64EL__) || defined(_M_ARM64)
# define SQLITE_BYTEORDER 1234
# elif defined(sparc) || defined(__ppc__) || \
defined(__ARMEB__) || defined(__AARCH64EB__)
# define SQLITE_BYTEORDER 4321
# else
# define SQLITE_BYTEORDER 0
# endif
#endif
#if SQLITE_BYTEORDER==4321
# define SQLITE_BIGENDIAN 1
# define SQLITE_LITTLEENDIAN 0
# define SQLITE_UTF16NATIVE SQLITE_UTF16BE
#elif SQLITE_BYTEORDER==1234
# define SQLITE_BIGENDIAN 0
# define SQLITE_LITTLEENDIAN 1
# define SQLITE_UTF16NATIVE SQLITE_UTF16LE
#else
# ifdef SQLITE_AMALGAMATION
const int sqlite3one = 1;
# else
extern const int sqlite3one;
# endif
# define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
# define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
#endif
/*
** Constants for the largest and smallest possible 64-bit signed integers.
** These macros are designed to work correctly on both 32-bit and 64-bit
** compilers.
*/
#define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32))
#define LARGEST_UINT64 (0xffffffff|(((u64)0xffffffff)<<32))
#define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)
/*
** Round up a number to the next larger multiple of 8. This is used
** to force 8-byte alignment on 64-bit architectures.
**
** ROUND8() always does the rounding, for any argument.
**
** ROUND8P() assumes that the argument is already an integer number of
** pointers in size, and so it is a no-op on systems where the pointer
** size is 8.
*/
#define ROUND8(x) (((x)+7)&~7)
#if SQLITE_PTRSIZE==8
# define ROUND8P(x) (x)
#else
# define ROUND8P(x) (((x)+7)&~7)
#endif
/*
** Round down to the nearest multiple of 8
*/
#define ROUNDDOWN8(x) ((x)&~7)
/*
** Assert that the pointer X is aligned to an 8-byte boundary. This
** macro is used only within assert() to verify that the code gets
** all alignment restrictions correct.
**
** Except, if SQLITE_4_BYTE_ALIGNED_MALLOC is defined, then the
** underlying malloc() implementation might return us 4-byte aligned
** pointers. In that case, only verify 4-byte alignment.
*/
#ifdef SQLITE_4_BYTE_ALIGNED_MALLOC
# define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&3)==0)
#else
# define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&7)==0)
#endif
/*
** Disable MMAP on platforms where it is known to not work
*/
#if defined(__OpenBSD__) || defined(__QNXNTO__)
# undef SQLITE_MAX_MMAP_SIZE
# define SQLITE_MAX_MMAP_SIZE 0
#endif
/*
** Default maximum size of memory used by memory-mapped I/O in the VFS
*/
#ifdef __APPLE__
# include <TargetConditionals.h>
#endif
#ifndef SQLITE_MAX_MMAP_SIZE
# if defined(__linux__) \
|| defined(_WIN32) \
|| (defined(__APPLE__) && defined(__MACH__)) \
|| defined(__sun) \
|| defined(__FreeBSD__) \
|| defined(__DragonFly__)
# define SQLITE_MAX_MMAP_SIZE 0x7fff0000 /* 2147418112 */
# else
# define SQLITE_MAX_MMAP_SIZE 0
# endif
#endif
/*
** The default MMAP_SIZE is zero on all platforms. Or, even if a larger
** default MMAP_SIZE is specified at compile-time, make sure that it does
** not exceed the maximum mmap size.
*/
#ifndef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE 0
#endif
#if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE
# undef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE
#endif
/*
** TREETRACE_ENABLED will be either 1 or 0 depending on whether or not
** the Abstract Syntax Tree tracing logic is turned on.
*/
#if !defined(SQLITE_AMALGAMATION)
extern u32 sqlite3TreeTrace;
#endif
#if defined(SQLITE_DEBUG) \
&& (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_SELECTTRACE) \
|| defined(SQLITE_ENABLE_TREETRACE))
# define TREETRACE_ENABLED 1
# define SELECTTRACE(K,P,S,X) \
if(sqlite3TreeTrace&(K)) \
sqlite3DebugPrintf("%u/%d/%p: ",(S)->selId,(P)->addrExplain,(S)),\
sqlite3DebugPrintf X
#else
# define SELECTTRACE(K,P,S,X)
# define TREETRACE_ENABLED 0
#endif
/*
** Macros for "wheretrace"
*/
extern u32 sqlite3WhereTrace;
#if defined(SQLITE_DEBUG) \
&& (defined(SQLITE_TEST) || defined(SQLITE_ENABLE_WHERETRACE))
# define WHERETRACE(K,X) if(sqlite3WhereTrace&(K)) sqlite3DebugPrintf X
# define WHERETRACE_ENABLED 1
#else
# define WHERETRACE(K,X)
#endif
/*
** An instance of the following structure is used to store the busy-handler
** callback for a given sqlite handle.
**
** The sqlite.busyHandler member of the sqlite struct contains the busy
** callback for the database handle. Each pager opened via the sqlite
** handle is passed a pointer to sqlite.busyHandler. The busy-handler
** callback is currently invoked only from within pager.c.
*/
typedef struct BusyHandler BusyHandler;
struct BusyHandler {
int (*xBusyHandler)(void *,int); /* The busy callback */
void *pBusyArg; /* First arg to busy callback */
int nBusy; /* Incremented with each busy call */
};
/*
** Name of table that holds the database schema.
**
** The PREFERRED names are used whereever possible. But LEGACY is also
** used for backwards compatibility.
**
** 1. Queries can use either the PREFERRED or the LEGACY names
** 2. The sqlite3_set_authorizer() callback uses the LEGACY name
** 3. The PRAGMA table_list statement uses the PREFERRED name
**
** The LEGACY names are stored in the internal symbol hash table
** in support of (2). Names are translated using sqlite3PreferredTableName()
** for (3). The sqlite3FindTable() function takes care of translating
** names for (1).
**
** Note that "sqlite_temp_schema" can also be called "temp.sqlite_schema".
*/
#define LEGACY_SCHEMA_TABLE "sqlite_master"
#define LEGACY_TEMP_SCHEMA_TABLE "sqlite_temp_master"
#define PREFERRED_SCHEMA_TABLE "sqlite_schema"
#define PREFERRED_TEMP_SCHEMA_TABLE "sqlite_temp_schema"
/*
** The root-page of the schema table.
*/
#define SCHEMA_ROOT 1
/*
** The name of the schema table. The name is different for TEMP.
*/
#define SCHEMA_TABLE(x) \
((!OMIT_TEMPDB)&&(x==1)?LEGACY_TEMP_SCHEMA_TABLE:LEGACY_SCHEMA_TABLE)
/*
** A convenience macro that returns the number of elements in
** an array.
*/
#define ArraySize(X) ((int)(sizeof(X)/sizeof(X[0])))
/*
** Determine if the argument is a power of two
*/
#define IsPowerOfTwo(X) (((X)&((X)-1))==0)
/*
** The following value as a destructor means to use sqlite3DbFree().
** The sqlite3DbFree() routine requires two parameters instead of the
** one parameter that destructors normally want. So we have to introduce
** this magic value that the code knows to handle differently. Any
** pointer will work here as long as it is distinct from SQLITE_STATIC
** and SQLITE_TRANSIENT.
*/
#define SQLITE_DYNAMIC ((sqlite3_destructor_type)sqlite3OomClear)
/*
** When SQLITE_OMIT_WSD is defined, it means that the target platform does
** not support Writable Static Data (WSD) such as global and static variables.
** All variables must either be on the stack or dynamically allocated from
** the heap. When WSD is unsupported, the variable declarations scattered
** throughout the SQLite code must become constants instead. The SQLITE_WSD
** macro is used for this purpose. And instead of referencing the variable
** directly, we use its constant as a key to lookup the run-time allocated
** buffer that holds real variable. The constant is also the initializer
** for the run-time allocated buffer.
**
** In the usual case where WSD is supported, the SQLITE_WSD and GLOBAL
** macros become no-ops and have zero performance impact.
*/
#ifdef SQLITE_OMIT_WSD
#define SQLITE_WSD const
#define GLOBAL(t,v) (*(t*)sqlite3_wsd_find((void*)&(v), sizeof(v)))
#define sqlite3GlobalConfig GLOBAL(struct Sqlite3Config, sqlite3Config)
int sqlite3_wsd_init(int N, int J);
void *sqlite3_wsd_find(void *K, int L);
#else
#define SQLITE_WSD
#define GLOBAL(t,v) v
#define sqlite3GlobalConfig sqlite3Config
#endif
/*
** The following macros are used to suppress compiler warnings and to
** make it clear to human readers when a function parameter is deliberately
** left unused within the body of a function. This usually happens when
** a function is called via a function pointer. For example the
** implementation of an SQL aggregate step callback may not use the
** parameter indicating the number of arguments passed to the aggregate,
** if it knows that this is enforced elsewhere.
**
** When a function parameter is not used at all within the body of a function,
** it is generally named "NotUsed" or "NotUsed2" to make things even clearer.
** However, these macros may also be used to suppress warnings related to
** parameters that may or may not be used depending on compilation options.
** For example those parameters only used in assert() statements. In these
** cases the parameters are named as per the usual conventions.
*/
#define UNUSED_PARAMETER(x) (void)(x)
#define UNUSED_PARAMETER2(x,y) UNUSED_PARAMETER(x),UNUSED_PARAMETER(y)
/*
** Forward references to structures
*/
typedef struct AggInfo AggInfo;
typedef struct AuthContext AuthContext;
typedef struct AutoincInfo AutoincInfo;
typedef struct Bitvec Bitvec;
typedef struct CollSeq CollSeq;
typedef struct Column Column;
typedef struct Cte Cte;
typedef struct CteUse CteUse;
typedef struct Db Db;
typedef struct DbFixer DbFixer;
typedef struct Schema Schema;
typedef struct Expr Expr;
typedef struct ExprList ExprList;
typedef struct FKey FKey;
typedef struct FuncDestructor FuncDestructor;
typedef struct FuncDef FuncDef;
typedef struct FuncDefHash FuncDefHash;
typedef struct IdList IdList;
typedef struct Index Index;
typedef struct IndexSample IndexSample;
typedef struct KeyClass KeyClass;
typedef struct KeyInfo KeyInfo;
typedef struct Lookaside Lookaside;
typedef struct LookasideSlot LookasideSlot;
typedef struct Module Module;
typedef struct NameContext NameContext;
typedef struct OnOrUsing OnOrUsing;
typedef struct Parse Parse;
typedef struct ParseCleanup ParseCleanup;
typedef struct PreUpdate PreUpdate;
typedef struct PrintfArguments PrintfArguments;
typedef struct RenameToken RenameToken;
typedef struct Returning Returning;
typedef struct RowSet RowSet;
typedef struct Savepoint Savepoint;
typedef struct Select Select;
typedef struct SQLiteThread SQLiteThread;
typedef struct SelectDest SelectDest;
typedef struct SrcItem SrcItem;
typedef struct SrcList SrcList;
typedef struct sqlite3_str StrAccum; /* Internal alias for sqlite3_str */
typedef struct Table Table;
typedef struct TableLock TableLock;
typedef struct Token Token;
typedef struct TreeView TreeView;
typedef struct Trigger Trigger;
typedef struct TriggerPrg TriggerPrg;
typedef struct TriggerStep TriggerStep;
typedef struct UnpackedRecord UnpackedRecord;
typedef struct Upsert Upsert;
typedef struct VTable VTable;
typedef struct VtabCtx VtabCtx;
typedef struct Walker Walker;
typedef struct WhereInfo WhereInfo;
typedef struct Window Window;
typedef struct With With;
/*
** The bitmask datatype defined below is used for various optimizations.
**
** Changing this from a 64-bit to a 32-bit type limits the number of
** tables in a join to 32 instead of 64. But it also reduces the size
** of the library by 738 bytes on ix86.
*/
#ifdef SQLITE_BITMASK_TYPE
typedef SQLITE_BITMASK_TYPE Bitmask;
#else
typedef u64 Bitmask;
#endif
/*
** The number of bits in a Bitmask. "BMS" means "BitMask Size".
*/
#define BMS ((int)(sizeof(Bitmask)*8))
/*
** A bit in a Bitmask
*/
#define MASKBIT(n) (((Bitmask)1)<<(n))
#define MASKBIT64(n) (((u64)1)<<(n))
#define MASKBIT32(n) (((unsigned int)1)<<(n))
#define SMASKBIT32(n) ((n)<=31?((unsigned int)1)<<(n):0)
#define ALLBITS ((Bitmask)-1)
/* A VList object records a mapping between parameters/variables/wildcards
** in the SQL statement (such as $abc, @pqr, or :xyz) and the integer
** variable number associated with that parameter. See the format description
** on the sqlite3VListAdd() routine for more information. A VList is really
** just an array of integers.
*/
typedef int VList;
/*
** Defer sourcing vdbe.h and btree.h until after the "u8" and
** "BusyHandler" typedefs. vdbe.h also requires a few of the opaque
** pointer types (i.e. FuncDef) defined above.
*/
#include "pager.h"
#include "btree.h"
#include "vdbe.h"
#include "pcache.h"
#include "os.h"
#include "mutex.h"
/* The SQLITE_EXTRA_DURABLE compile-time option used to set the default
** synchronous setting to EXTRA. It is no longer supported.
*/
#ifdef SQLITE_EXTRA_DURABLE
# warning Use SQLITE_DEFAULT_SYNCHRONOUS=3 instead of SQLITE_EXTRA_DURABLE
# define SQLITE_DEFAULT_SYNCHRONOUS 3
#endif
/*
** Default synchronous levels.
**
** Note that (for historcal reasons) the PAGER_SYNCHRONOUS_* macros differ
** from the SQLITE_DEFAULT_SYNCHRONOUS value by 1.
**
** PAGER_SYNCHRONOUS DEFAULT_SYNCHRONOUS
** OFF 1 0
** NORMAL 2 1
** FULL 3 2
** EXTRA 4 3
**
** The "PRAGMA synchronous" statement also uses the zero-based numbers.
** In other words, the zero-based numbers are used for all external interfaces
** and the one-based values are used internally.
*/
#ifndef SQLITE_DEFAULT_SYNCHRONOUS
# define SQLITE_DEFAULT_SYNCHRONOUS 2
#endif
#ifndef SQLITE_DEFAULT_WAL_SYNCHRONOUS
# define SQLITE_DEFAULT_WAL_SYNCHRONOUS SQLITE_DEFAULT_SYNCHRONOUS
#endif
/*
** Each database file to be accessed by the system is an instance
** of the following structure. There are normally two of these structures
** in the sqlite.aDb[] array. aDb[0] is the main database file and
** aDb[1] is the database file used to hold temporary tables. Additional
** databases may be attached.
*/
struct Db {
char *zDbSName; /* Name of this database. (schema name, not filename) */
Btree *pBt; /* The B*Tree structure for this database file */
u8 safety_level; /* How aggressive at syncing data to disk */
u8 bSyncSet; /* True if "PRAGMA synchronous=N" has been run */
Schema *pSchema; /* Pointer to database schema (possibly shared) */
};
/*
** An instance of the following structure stores a database schema.
**
** Most Schema objects are associated with a Btree. The exception is
** the Schema for the TEMP databaes (sqlite3.aDb[1]) which is free-standing.
** In shared cache mode, a single Schema object can be shared by multiple
** Btrees that refer to the same underlying BtShared object.
**
** Schema objects are automatically deallocated when the last Btree that
** references them is destroyed. The TEMP Schema is manually freed by
** sqlite3_close().
*
** A thread must be holding a mutex on the corresponding Btree in order
** to access Schema content. This implies that the thread must also be
** holding a mutex on the sqlite3 connection pointer that owns the Btree.
** For a TEMP Schema, only the connection mutex is required.
*/
struct Schema {
int schema_cookie; /* Database schema version number for this file */
int iGeneration; /* Generation counter. Incremented with each change */
Hash tblHash; /* All tables indexed by name */
Hash idxHash; /* All (named) indices indexed by name */
Hash trigHash; /* All triggers indexed by name */
Hash fkeyHash; /* All foreign keys by referenced table name */
Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
u8 file_format; /* Schema format version for this file */
u8 enc; /* Text encoding used by this database */
u16 schemaFlags; /* Flags associated with this schema */
int cache_size; /* Number of pages to use in the cache */
};
/*
** These macros can be used to test, set, or clear bits in the
** Db.pSchema->flags field.
*/
#define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))==(P))
#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->schemaFlags&(P))!=0)
#define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags|=(P)
#define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->schemaFlags&=~(P)
/*
** Allowed values for the DB.pSchema->flags field.
**
** The DB_SchemaLoaded flag is set after the database schema has been
** read into internal hash tables.
**
** DB_UnresetViews means that one or more views have column names that
** have been filled out. If the schema changes, these column names might
** changes and so the view will need to be reset.
*/
#define DB_SchemaLoaded 0x0001 /* The schema has been loaded */
#define DB_UnresetViews 0x0002 /* Some views have defined column names */
#define DB_ResetWanted 0x0008 /* Reset the schema when nSchemaLock==0 */
/*
** The number of different kinds of things that can be limited
** using the sqlite3_limit() interface.
*/
#define SQLITE_N_LIMIT (SQLITE_LIMIT_WORKER_THREADS+1)
/*
** Lookaside malloc is a set of fixed-size buffers that can be used
** to satisfy small transient memory allocation requests for objects
** associated with a particular database connection. The use of
** lookaside malloc provides a significant performance enhancement
** (approx 10%) by avoiding numerous malloc/free requests while parsing
** SQL statements.
**
** The Lookaside structure holds configuration information about the
** lookaside malloc subsystem. Each available memory allocation in
** the lookaside subsystem is stored on a linked list of LookasideSlot
** objects.
**
** Lookaside allocations are only allowed for objects that are associated
** with a particular database connection. Hence, schema information cannot
** be stored in lookaside because in shared cache mode the schema information
** is shared by multiple database connections. Therefore, while parsing
** schema information, the Lookaside.bEnabled flag is cleared so that
** lookaside allocations are not used to construct the schema objects.
**
** New lookaside allocations are only allowed if bDisable==0. When
** bDisable is greater than zero, sz is set to zero which effectively
** disables lookaside without adding a new test for the bDisable flag
** in a performance-critical path. sz should be set by to szTrue whenever
** bDisable changes back to zero.
**
** Lookaside buffers are initially held on the pInit list. As they are
** used and freed, they are added back to the pFree list. New allocations
** come off of pFree first, then pInit as a fallback. This dual-list
** allows use to compute a high-water mark - the maximum number of allocations
** outstanding at any point in the past - by subtracting the number of
** allocations on the pInit list from the total number of allocations.
**
** Enhancement on 2019-12-12: Two-size-lookaside
** The default lookaside configuration is 100 slots of 1200 bytes each.
** The larger slot sizes are important for performance, but they waste
** a lot of space, as most lookaside allocations are less than 128 bytes.
** The two-size-lookaside enhancement breaks up the lookaside allocation
** into two pools: One of 128-byte slots and the other of the default size
** (1200-byte) slots. Allocations are filled from the small-pool first,
** failing over to the full-size pool if that does not work. Thus more
** lookaside slots are available while also using less memory.
** This enhancement can be omitted by compiling with
** SQLITE_OMIT_TWOSIZE_LOOKASIDE.
*/
struct Lookaside {
u32 bDisable; /* Only operate the lookaside when zero */
u16 sz; /* Size of each buffer in bytes */
u16 szTrue; /* True value of sz, even if disabled */
u8 bMalloced; /* True if pStart obtained from sqlite3_malloc() */
u32 nSlot; /* Number of lookaside slots allocated */
u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */
LookasideSlot *pInit; /* List of buffers not previously used */
LookasideSlot *pFree; /* List of available buffers */
#ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE
LookasideSlot *pSmallInit; /* List of small buffers not prediously used */
LookasideSlot *pSmallFree; /* List of available small buffers */
void *pMiddle; /* First byte past end of full-size buffers and
** the first byte of LOOKASIDE_SMALL buffers */
#endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */
void *pStart; /* First byte of available memory space */
void *pEnd; /* First byte past end of available space */
};
struct LookasideSlot {
LookasideSlot *pNext; /* Next buffer in the list of free buffers */
};
#define DisableLookaside db->lookaside.bDisable++;db->lookaside.sz=0
#define EnableLookaside db->lookaside.bDisable--;\
db->lookaside.sz=db->lookaside.bDisable?0:db->lookaside.szTrue
/* Size of the smaller allocations in two-size lookside */
#ifdef SQLITE_OMIT_TWOSIZE_LOOKASIDE
# define LOOKASIDE_SMALL 0
#else
# define LOOKASIDE_SMALL 128
#endif
/*
** A hash table for built-in function definitions. (Application-defined
** functions use a regular table table from hash.h.)
**
** Hash each FuncDef structure into one of the FuncDefHash.a[] slots.
** Collisions are on the FuncDef.u.pHash chain. Use the SQLITE_FUNC_HASH()
** macro to compute a hash on the function name.
*/
#define SQLITE_FUNC_HASH_SZ 23
struct FuncDefHash {
FuncDef *a[SQLITE_FUNC_HASH_SZ]; /* Hash table for functions */
};
#define SQLITE_FUNC_HASH(C,L) (((C)+(L))%SQLITE_FUNC_HASH_SZ)
#ifdef SQLITE_USER_AUTHENTICATION
/*
** Information held in the "sqlite3" database connection object and used
** to manage user authentication.
*/
typedef struct sqlite3_userauth sqlite3_userauth;
struct sqlite3_userauth {
u8 authLevel; /* Current authentication level */
int nAuthPW; /* Size of the zAuthPW in bytes */
char *zAuthPW; /* Password used to authenticate */
char *zAuthUser; /* User name used to authenticate */
};
/* Allowed values for sqlite3_userauth.authLevel */
#define UAUTH_Unknown 0 /* Authentication not yet checked */
#define UAUTH_Fail 1 /* User authentication failed */
#define UAUTH_User 2 /* Authenticated as a normal user */
#define UAUTH_Admin 3 /* Authenticated as an administrator */
/* Functions used only by user authorization logic */
int sqlite3UserAuthTable(const char*);
int sqlite3UserAuthCheckLogin(sqlite3*,const char*,u8*);
void sqlite3UserAuthInit(sqlite3*);
void sqlite3CryptFunc(sqlite3_context*,int,sqlite3_value**);
#endif /* SQLITE_USER_AUTHENTICATION */
/*
** typedef for the authorization callback function.
*/
#ifdef SQLITE_USER_AUTHENTICATION
typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*,
const char*, const char*);
#else
typedef int (*sqlite3_xauth)(void*,int,const char*,const char*,const char*,
const char*);
#endif
#ifndef SQLITE_OMIT_DEPRECATED
/* This is an extra SQLITE_TRACE macro that indicates "legacy" tracing
** in the style of sqlite3_trace()
*/
#define SQLITE_TRACE_LEGACY 0x40 /* Use the legacy xTrace */
#define SQLITE_TRACE_XPROFILE 0x80 /* Use the legacy xProfile */
#else
#define SQLITE_TRACE_LEGACY 0
#define SQLITE_TRACE_XPROFILE 0
#endif /* SQLITE_OMIT_DEPRECATED */
#define SQLITE_TRACE_NONLEGACY_MASK 0x0f /* Normal flags */
/*
** Maximum number of sqlite3.aDb[] entries. This is the number of attached
** databases plus 2 for "main" and "temp".
*/
#define SQLITE_MAX_DB (SQLITE_MAX_ATTACHED+2)
/*
** Each database connection is an instance of the following structure.
*/
struct sqlite3 {
sqlite3_vfs *pVfs; /* OS Interface */
struct Vdbe *pVdbe; /* List of active virtual machines */
CollSeq *pDfltColl; /* BINARY collseq for the database encoding */
sqlite3_mutex *mutex; /* Connection mutex */
Db *aDb; /* All backends */
int nDb; /* Number of backends currently in use */
u32 mDbFlags; /* flags recording internal state */
u64 flags; /* flags settable by pragmas. See below */
i64 lastRowid; /* ROWID of most recent insert (see above) */
i64 szMmap; /* Default mmap_size setting */
u32 nSchemaLock; /* Do not reset the schema when non-zero */
unsigned int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */
int errCode; /* Most recent error code (SQLITE_*) */
int errByteOffset; /* Byte offset of error in SQL statement */
int errMask; /* & result codes with this before returning */
int iSysErrno; /* Errno value from last system error */
u32 dbOptFlags; /* Flags to enable/disable optimizations */
u8 enc; /* Text encoding */
u8 autoCommit; /* The auto-commit flag. */
u8 temp_store; /* 1: file 2: memory 0: default */
u8 mallocFailed; /* True if we have seen a malloc failure */
u8 bBenignMalloc; /* Do not require OOMs if true */
u8 dfltLockMode; /* Default locking-mode for attached dbs */
signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */
u8 suppressErr; /* Do not issue error messages if true */
u8 vtabOnConflict; /* Value to return for s3_vtab_on_conflict() */
u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */
u8 mTrace; /* zero or more SQLITE_TRACE flags */
u8 noSharedCache; /* True if no shared-cache backends */
u8 nSqlExec; /* Number of pending OP_SqlExec opcodes */
u8 eOpenState; /* Current condition of the connection */
int nextPagesize; /* Pagesize after VACUUM if >0 */
i64 nChange; /* Value returned by sqlite3_changes() */
i64 nTotalChange; /* Value returned by sqlite3_total_changes() */
int aLimit[SQLITE_N_LIMIT]; /* Limits */
int nMaxSorterMmap; /* Maximum size of regions mapped by sorter */
struct sqlite3InitInfo { /* Information used during initialization */
Pgno newTnum; /* Rootpage of table being initialized */
u8 iDb; /* Which db file is being initialized */
u8 busy; /* TRUE if currently initializing */
unsigned orphanTrigger : 1; /* Last statement is orphaned TEMP trigger */
unsigned imposterTable : 1; /* Building an imposter table */
unsigned reopenMemdb : 1; /* ATTACH is really a reopen using MemDB */
const char **azInit; /* "type", "name", and "tbl_name" columns */
} init;
int nVdbeActive; /* Number of VDBEs currently running */
int nVdbeRead; /* Number of active VDBEs that read or write */
int nVdbeWrite; /* Number of active VDBEs that read and write */
int nVdbeExec; /* Number of nested calls to VdbeExec() */
int nVDestroy; /* Number of active OP_VDestroy operations */
int nExtension; /* Number of loaded extensions */
void **aExtension; /* Array of shared library handles */
union {
void (*xLegacy)(void*,const char*); /* mTrace==SQLITE_TRACE_LEGACY */
int (*xV2)(u32,void*,void*,void*); /* All other mTrace values */
} trace;
void *pTraceArg; /* Argument to the trace function */
#ifndef SQLITE_OMIT_DEPRECATED
void (*xProfile)(void*,const char*,u64); /* Profiling function */
void *pProfileArg; /* Argument to profile function */
#endif
void *pCommitArg; /* Argument to xCommitCallback() */
int (*xCommitCallback)(void*); /* Invoked at every commit. */
void *pRollbackArg; /* Argument to xRollbackCallback() */
void (*xRollbackCallback)(void*); /* Invoked at every commit. */
void *pUpdateArg;
void (*xUpdateCallback)(void*,int, const char*,const char*,sqlite_int64);
void *pAutovacPagesArg; /* Client argument to autovac_pages */
void (*xAutovacDestr)(void*); /* Destructor for pAutovacPAgesArg */
unsigned int (*xAutovacPages)(void*,const char*,u32,u32,u32);
Parse *pParse; /* Current parse */
#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
void *pPreUpdateArg; /* First argument to xPreUpdateCallback */
void (*xPreUpdateCallback)( /* Registered using sqlite3_preupdate_hook() */
void*,sqlite3*,int,char const*,char const*,sqlite3_int64,sqlite3_int64
);
PreUpdate *pPreUpdate; /* Context for active pre-update callback */
#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
#ifndef SQLITE_OMIT_WAL
int (*xWalCallback)(void *, sqlite3 *, const char *, int);
void *pWalArg;
#endif
void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
void *pCollNeededArg;
sqlite3_value *pErr; /* Most recent error message */
union {
volatile int isInterrupted; /* True if sqlite3_interrupt has been called */
double notUsed1; /* Spacer */
} u1;
Lookaside lookaside; /* Lookaside malloc configuration */
#ifndef SQLITE_OMIT_AUTHORIZATION
sqlite3_xauth xAuth; /* Access authorization function */
void *pAuthArg; /* 1st argument to the access auth function */
#endif
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
int (*xProgress)(void *); /* The progress callback */
void *pProgressArg; /* Argument to the progress callback */
unsigned nProgressOps; /* Number of opcodes for progress callback */
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
int nVTrans; /* Allocated size of aVTrans */
Hash aModule; /* populated by sqlite3_create_module() */
VtabCtx *pVtabCtx; /* Context for active vtab connect/create */
VTable **aVTrans; /* Virtual tables with open transactions */
VTable *pDisconnect; /* Disconnect these in next sqlite3_prepare() */
#endif
Hash aFunc; /* Hash table of connection functions */
Hash aCollSeq; /* All collating sequences */
BusyHandler busyHandler; /* Busy callback */
Db aDbStatic[2]; /* Static space for the 2 default backends */
Savepoint *pSavepoint; /* List of active savepoints */
int nAnalysisLimit; /* Number of index rows to ANALYZE */
int busyTimeout; /* Busy handler timeout, in msec */
int nSavepoint; /* Number of non-transaction savepoints */
int nStatement; /* Number of nested statement-transactions */
i64 nDeferredCons; /* Net deferred constraints this transaction. */
i64 nDeferredImmCons; /* Net deferred immediate constraints */
int *pnBytesFreed; /* If not NULL, increment this in DbFree() */
#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
/* The following variables are all protected by the STATIC_MAIN
** mutex, not by sqlite3.mutex. They are used by code in notify.c.
**
** When X.pUnlockConnection==Y, that means that X is waiting for Y to
** unlock so that it can proceed.
**
** When X.pBlockingConnection==Y, that means that something that X tried
** tried to do recently failed with an SQLITE_LOCKED error due to locks
** held by Y.
*/
sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */
sqlite3 *pUnlockConnection; /* Connection to watch for unlock */
void *pUnlockArg; /* Argument to xUnlockNotify */
void (*xUnlockNotify)(void **, int); /* Unlock notify callback */
sqlite3 *pNextBlocked; /* Next in list of all blocked connections */
#endif
#ifdef SQLITE_USER_AUTHENTICATION
sqlite3_userauth auth; /* User authentication information */
#endif
};
/*
** A macro to discover the encoding of a database.
*/
#define SCHEMA_ENC(db) ((db)->aDb[0].pSchema->enc)
#define ENC(db) ((db)->enc)
/*
** A u64 constant where the lower 32 bits are all zeros. Only the
** upper 32 bits are included in the argument. Necessary because some
** C-compilers still do not accept LL integer literals.
*/
#define HI(X) ((u64)(X)<<32)
/*
** Possible values for the sqlite3.flags.
**
** Value constraints (enforced via assert()):
** SQLITE_FullFSync == PAGER_FULLFSYNC
** SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC
** SQLITE_CacheSpill == PAGER_CACHE_SPILL
*/
#define SQLITE_WriteSchema 0x00000001 /* OK to update SQLITE_SCHEMA */
#define SQLITE_LegacyFileFmt 0x00000002 /* Create new databases in format 1 */
#define SQLITE_FullColNames 0x00000004 /* Show full column names on SELECT */
#define SQLITE_FullFSync 0x00000008 /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync 0x00000010 /* Use full fsync for checkpoint */
#define SQLITE_CacheSpill 0x00000020 /* OK to spill pager cache */
#define SQLITE_ShortColNames 0x00000040 /* Show short columns names */
#define SQLITE_TrustedSchema 0x00000080 /* Allow unsafe functions and
** vtabs in the schema definition */
#define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */
/* result set is empty */
#define SQLITE_IgnoreChecks 0x00000200 /* Do not enforce check constraints */
#define SQLITE_ReadUncommit 0x00000400 /* READ UNCOMMITTED in shared-cache */
#define SQLITE_NoCkptOnClose 0x00000800 /* No checkpoint on close()/DETACH */
#define SQLITE_ReverseOrder 0x00001000 /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers 0x00002000 /* Enable recursive triggers */
#define SQLITE_ForeignKeys 0x00004000 /* Enforce foreign key constraints */
#define SQLITE_AutoIndex 0x00008000 /* Enable automatic indexes */
#define SQLITE_LoadExtension 0x00010000 /* Enable load_extension */
#define SQLITE_LoadExtFunc 0x00020000 /* Enable load_extension() SQL func */
#define SQLITE_EnableTrigger 0x00040000 /* True to enable triggers */
#define SQLITE_DeferFKs 0x00080000 /* Defer all FK constraints */
#define SQLITE_QueryOnly 0x00100000 /* Disable database changes */
#define SQLITE_CellSizeCk 0x00200000 /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer 0x00400000 /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG 0x00800000 /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP 0x01000000 /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase 0x02000000 /* Reset the database */
#define SQLITE_LegacyAlter 0x04000000 /* Legacy ALTER TABLE behaviour */
#define SQLITE_NoSchemaError 0x08000000 /* Do not report schema parse errors*/
#define SQLITE_Defensive 0x10000000 /* Input SQL is likely hostile */
#define SQLITE_DqsDDL 0x20000000 /* dbl-quoted strings allowed in DDL*/
#define SQLITE_DqsDML 0x40000000 /* dbl-quoted strings allowed in DML*/
#define SQLITE_EnableView 0x80000000 /* Enable the use of views */
#define SQLITE_CountRows HI(0x00001) /* Count rows changed by INSERT, */
/* DELETE, or UPDATE and return */
/* the count using a callback. */
#define SQLITE_CorruptRdOnly HI(0x00002) /* Prohibit writes due to error */
/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace HI(0x0100000) /* Debug print SQL as it executes */
#define SQLITE_VdbeListing HI(0x0200000) /* Debug listings of VDBE progs */
#define SQLITE_VdbeTrace HI(0x0400000) /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace HI(0x0800000) /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP HI(0x1000000) /* Debug EXPLAIN QUERY PLAN */
#define SQLITE_ParserTrace HI(0x2000000) /* PRAGMA parser_trace=ON */
#endif
/*
** Allowed values for sqlite3.mDbFlags
*/
#define DBFLAG_SchemaChange 0x0001 /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin 0x0002 /* Preference to built-in funcs */
#define DBFLAG_Vacuum 0x0004 /* Currently in a VACUUM */
#define DBFLAG_VacuumInto 0x0008 /* Currently running VACUUM INTO */
#define DBFLAG_SchemaKnownOk 0x0010 /* Schema is known to be valid */
#define DBFLAG_InternalFunc 0x0020 /* Allow use of internal functions */
#define DBFLAG_EncodingFixed 0x0040 /* No longer possible to change enc. */
/*
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x00000001 /* Query flattening */
#define SQLITE_WindowFunc 0x00000002 /* Use xInverse for window functions */
#define SQLITE_GroupByOrder 0x00000004 /* GROUPBY cover of ORDERBY */
#define SQLITE_FactorOutConst 0x00000008 /* Constant factoring */
#define SQLITE_DistinctOpt 0x00000010 /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan 0x00000020 /* Covering index scans */
#define SQLITE_OrderByIdxJoin 0x00000040 /* ORDER BY of joins via index */
#define SQLITE_Transitive 0x00000080 /* Transitive constraints */
#define SQLITE_OmitNoopJoin 0x00000100 /* Omit unused tables in joins */
#define SQLITE_CountOfView 0x00000200 /* The count-of-view optimization */
#define SQLITE_CursorHints 0x00000400 /* Add OP_CursorHint opcodes */
#define SQLITE_Stat4 0x00000800 /* Use STAT4 data */
/* TH3 expects this value ^^^^^^^^^^ to be 0x0000800. Don't change it */
#define SQLITE_PushDown 0x00001000 /* The push-down optimization */
#define SQLITE_SimplifyJoin 0x00002000 /* Convert LEFT JOIN to JOIN */
#define SQLITE_SkipScan 0x00004000 /* Skip-scans */
#define SQLITE_PropagateConst 0x00008000 /* The constant propagation opt */
#define SQLITE_MinMaxOpt 0x00010000 /* The min/max optimization */
#define SQLITE_SeekScan 0x00020000 /* The OP_SeekScan optimization */
#define SQLITE_OmitOrderBy 0x00040000 /* Omit pointless ORDER BY */
/* TH3 expects this value ^^^^^^^^^^ to be 0x40000. Coordinate any change */
#define SQLITE_BloomFilter 0x00080000 /* Use a Bloom filter on searches */
#define SQLITE_BloomPulldown 0x00100000 /* Run Bloom filters early */
#define SQLITE_BalancedMerge 0x00200000 /* Balance multi-way merges */
#define SQLITE_ReleaseReg 0x00400000 /* Use OP_ReleaseReg for testing */
#define SQLITE_FlttnUnionAll 0x00800000 /* Disable the UNION ALL flattener */
/* TH3 expects this value ^^^^^^^^^^ See flatten04.test */
#define SQLITE_AllOpts 0xffffffff /* All optimizations */
/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#define OptimizationDisabled(db, mask) (((db)->dbOptFlags&(mask))!=0)
#define OptimizationEnabled(db, mask) (((db)->dbOptFlags&(mask))==0)
/*
** Return true if it OK to factor constant expressions into the initialization
** code. The argument is a Parse object for the code generator.
*/
#define ConstFactorOk(P) ((P)->okConstFactor)
/* Possible values for the sqlite3.eOpenState field.
** The numbers are randomly selected such that a minimum of three bits must
** change to convert any number to another or to zero
*/
#define SQLITE_STATE_OPEN 0x76 /* Database is open */
#define SQLITE_STATE_CLOSED 0xce /* Database is closed */
#define SQLITE_STATE_SICK 0xba /* Error and awaiting close */
#define SQLITE_STATE_BUSY 0x6d /* Database currently in use */
#define SQLITE_STATE_ERROR 0xd5 /* An SQLITE_MISUSE error occurred */
#define SQLITE_STATE_ZOMBIE 0xa7 /* Close with last statement close */
/*
** Each SQL function is defined by an instance of the following
** structure. For global built-in functions (ex: substr(), max(), count())
** a pointer to this structure is held in the sqlite3BuiltinFunctions object.
** For per-connection application-defined functions, a pointer to this
** structure is held in the db->aHash hash table.
**
** The u.pHash field is used by the global built-ins. The u.pDestructor
** field is used by per-connection app-def functions.
*/
struct FuncDef {
i8 nArg; /* Number of arguments. -1 means unlimited */
u32 funcFlags; /* Some combination of SQLITE_FUNC_* */
void *pUserData; /* User data parameter */
FuncDef *pNext; /* Next function with same name */
void (*xSFunc)(sqlite3_context*,int,sqlite3_value**); /* func or agg-step */
void (*xFinalize)(sqlite3_context*); /* Agg finalizer */
void (*xValue)(sqlite3_context*); /* Current agg value */
void (*xInverse)(sqlite3_context*,int,sqlite3_value**); /* inverse agg-step */
const char *zName; /* SQL name of the function. */
union {
FuncDef *pHash; /* Next with a different name but the same hash */
FuncDestructor *pDestructor; /* Reference counted destructor function */
} u; /* pHash if SQLITE_FUNC_BUILTIN, pDestructor otherwise */
};
/*
** This structure encapsulates a user-function destructor callback (as
** configured using create_function_v2()) and a reference counter. When
** create_function_v2() is called to create a function with a destructor,
** a single object of this type is allocated. FuncDestructor.nRef is set to
** the number of FuncDef objects created (either 1 or 3, depending on whether
** or not the specified encoding is SQLITE_ANY). The FuncDef.pDestructor
** member of each of the new FuncDef objects is set to point to the allocated
** FuncDestructor.
**
** Thereafter, when one of the FuncDef objects is deleted, the reference
** count on this object is decremented. When it reaches 0, the destructor
** is invoked and the FuncDestructor structure freed.
*/
struct FuncDestructor {
int nRef;
void (*xDestroy)(void *);
void *pUserData;
};
/*
** Possible values for FuncDef.flags. Note that the _LENGTH and _TYPEOF
** values must correspond to OPFLAG_LENGTHARG and OPFLAG_TYPEOFARG. And
** SQLITE_FUNC_CONSTANT must be the same as SQLITE_DETERMINISTIC. There
** are assert() statements in the code to verify this.
**
** Value constraints (enforced via assert()):
** SQLITE_FUNC_MINMAX == NC_MinMaxAgg == SF_MinMaxAgg
** SQLITE_FUNC_ANYORDER == NC_OrderAgg == SF_OrderByReqd
** SQLITE_FUNC_LENGTH == OPFLAG_LENGTHARG
** SQLITE_FUNC_TYPEOF == OPFLAG_TYPEOFARG
** SQLITE_FUNC_CONSTANT == SQLITE_DETERMINISTIC from the API
** SQLITE_FUNC_DIRECT == SQLITE_DIRECTONLY from the API
** SQLITE_FUNC_UNSAFE == SQLITE_INNOCUOUS
** SQLITE_FUNC_ENCMASK depends on SQLITE_UTF* macros in the API
*/
#define SQLITE_FUNC_ENCMASK 0x0003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */
#define SQLITE_FUNC_LIKE 0x0004 /* Candidate for the LIKE optimization */
#define SQLITE_FUNC_CASE 0x0008 /* Case-sensitive LIKE-type function */
#define SQLITE_FUNC_EPHEM 0x0010 /* Ephemeral. Delete with VDBE */
#define SQLITE_FUNC_NEEDCOLL 0x0020 /* sqlite3GetFuncCollSeq() might be called*/
#define SQLITE_FUNC_LENGTH 0x0040 /* Built-in length() function */
#define SQLITE_FUNC_TYPEOF 0x0080 /* Built-in typeof() function */
#define SQLITE_FUNC_COUNT 0x0100 /* Built-in count(*) aggregate */
/* 0x0200 -- available for reuse */
#define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */
#define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */
#define SQLITE_FUNC_MINMAX 0x1000 /* True for min() and max() aggregates */
#define SQLITE_FUNC_SLOCHNG 0x2000 /* "Slow Change". Value constant during a
** single query - might change over time */
#define SQLITE_FUNC_TEST 0x4000 /* Built-in testing functions */
/* 0x8000 -- available for reuse */
#define SQLITE_FUNC_WINDOW 0x00010000 /* Built-in window-only function */
#define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */
#define SQLITE_FUNC_DIRECT 0x00080000 /* Not for use in TRIGGERs or VIEWs */
#define SQLITE_FUNC_SUBTYPE 0x00100000 /* Result likely to have sub-type */
#define SQLITE_FUNC_UNSAFE 0x00200000 /* Function has side effects */
#define SQLITE_FUNC_INLINE 0x00400000 /* Functions implemented in-line */
#define SQLITE_FUNC_BUILTIN 0x00800000 /* This is a built-in function */
#define SQLITE_FUNC_ANYORDER 0x08000000 /* count/min/max aggregate */
/* Identifier numbers for each in-line function */
#define INLINEFUNC_coalesce 0
#define INLINEFUNC_implies_nonnull_row 1
#define INLINEFUNC_expr_implies_expr 2
#define INLINEFUNC_expr_compare 3
#define INLINEFUNC_affinity 4
#define INLINEFUNC_iif 5
#define INLINEFUNC_sqlite_offset 6
#define INLINEFUNC_unlikely 99 /* Default case */
/*
** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are
** used to create the initializers for the FuncDef structures.
**
** FUNCTION(zName, nArg, iArg, bNC, xFunc)
** Used to create a scalar function definition of a function zName
** implemented by C function xFunc that accepts nArg arguments. The
** value passed as iArg is cast to a (void*) and made available
** as the user-data (sqlite3_user_data()) for the function. If
** argument bNC is true, then the SQLITE_FUNC_NEEDCOLL flag is set.
**
** VFUNCTION(zName, nArg, iArg, bNC, xFunc)
** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag.
**
** SFUNCTION(zName, nArg, iArg, bNC, xFunc)
** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and
** adds the SQLITE_DIRECTONLY flag.
**
** INLINE_FUNC(zName, nArg, iFuncId, mFlags)
** zName is the name of a function that is implemented by in-line
** byte code rather than by the usual callbacks. The iFuncId
** parameter determines the function id. The mFlags parameter is
** optional SQLITE_FUNC_ flags for this function.
**
** TEST_FUNC(zName, nArg, iFuncId, mFlags)
** zName is the name of a test-only function implemented by in-line
** byte code rather than by the usual callbacks. The iFuncId
** parameter determines the function id. The mFlags parameter is
** optional SQLITE_FUNC_ flags for this function.
**
** DFUNCTION(zName, nArg, iArg, bNC, xFunc)
** Like FUNCTION except it omits the SQLITE_FUNC_CONSTANT flag and
** adds the SQLITE_FUNC_SLOCHNG flag. Used for date & time functions
** and functions like sqlite_version() that can change, but not during
** a single query. The iArg is ignored. The user-data is always set
** to a NULL pointer. The bNC parameter is not used.
**
** MFUNCTION(zName, nArg, xPtr, xFunc)
** For math-library functions. xPtr is an arbitrary pointer.
**
** PURE_DATE(zName, nArg, iArg, bNC, xFunc)
** Used for "pure" date/time functions, this macro is like DFUNCTION
** except that it does set the SQLITE_FUNC_CONSTANT flags. iArg is
** ignored and the user-data for these functions is set to an
** arbitrary non-NULL pointer. The bNC parameter is not used.
**
** AGGREGATE(zName, nArg, iArg, bNC, xStep, xFinal)
** Used to create an aggregate function definition implemented by
** the C functions xStep and xFinal. The first four parameters
** are interpreted in the same way as the first 4 parameters to
** FUNCTION().
**
** WAGGREGATE(zName, nArg, iArg, xStep, xFinal, xValue, xInverse)
** Used to create an aggregate function definition implemented by
** the C functions xStep and xFinal. The first four parameters
** are interpreted in the same way as the first 4 parameters to
** FUNCTION().
**
** LIKEFUNC(zName, nArg, pArg, flags)
** Used to create a scalar function definition of a function zName
** that accepts nArg arguments and is implemented by a call to C
** function likeFunc. Argument pArg is cast to a (void *) and made
** available as the function user-data (sqlite3_user_data()). The
** FuncDef.flags variable is set to the value passed as the flags
** parameter.
*/
#define FUNCTION(zName, nArg, iArg, bNC, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define VFUNCTION(zName, nArg, iArg, bNC, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define SFUNCTION(zName, nArg, iArg, bNC, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_UTF8|SQLITE_DIRECTONLY|SQLITE_FUNC_UNSAFE, \
SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define MFUNCTION(zName, nArg, xPtr, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_FUNC_CONSTANT|SQLITE_UTF8, \
xPtr, 0, xFunc, 0, 0, 0, #zName, {0} }
#define JFUNCTION(zName, nArg, iArg, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_DETERMINISTIC|SQLITE_INNOCUOUS|\
SQLITE_FUNC_CONSTANT|SQLITE_UTF8, \
SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define INLINE_FUNC(zName, nArg, iArg, mFlags) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_UTF8|SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \
SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} }
#define TEST_FUNC(zName, nArg, iArg, mFlags) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_UTF8|SQLITE_FUNC_INTERNAL|SQLITE_FUNC_TEST| \
SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \
SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} }
#define DFUNCTION(zName, nArg, iArg, bNC, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_FUNC_SLOCHNG|SQLITE_UTF8, \
0, 0, xFunc, 0, 0, 0, #zName, {0} }
#define PURE_DATE(zName, nArg, iArg, bNC, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \
(void*)&sqlite3Config, 0, xFunc, 0, 0, 0, #zName, {0} }
#define FUNCTION2(zName, nArg, iArg, bNC, xFunc, extraFlags) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL)|extraFlags,\
SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define STR_FUNCTION(zName, nArg, pArg, bNC, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_FUNC_SLOCHNG|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \
pArg, 0, xFunc, 0, 0, 0, #zName, }
#define LIKEFUNC(zName, nArg, arg, flags) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_FUNC_CONSTANT|SQLITE_UTF8|flags, \
(void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} }
#define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \
{nArg, SQLITE_FUNC_BUILTIN|SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}}
#define INTERNAL_FUNCTION(zName, nArg, xFunc) \
{nArg, SQLITE_FUNC_BUILTIN|\
SQLITE_FUNC_INTERNAL|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \
0, 0, xFunc, 0, 0, 0, #zName, {0} }
/*
** All current savepoints are stored in a linked list starting at
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
*/
struct Savepoint {
char *zName; /* Savepoint name (nul-terminated) */
i64 nDeferredCons; /* Number of deferred fk violations */
i64 nDeferredImmCons; /* Number of deferred imm fk. */
Savepoint *pNext; /* Parent savepoint (if any) */
};
/*
** The following are used as the second parameter to sqlite3Savepoint(),
** and as the P1 argument to the OP_Savepoint instruction.
*/
#define SAVEPOINT_BEGIN 0
#define SAVEPOINT_RELEASE 1
#define SAVEPOINT_ROLLBACK 2
/*
** Each SQLite module (virtual table definition) is defined by an
** instance of the following structure, stored in the sqlite3.aModule
** hash table.
*/
struct Module {
const sqlite3_module *pModule; /* Callback pointers */
const char *zName; /* Name passed to create_module() */
int nRefModule; /* Number of pointers to this object */
void *pAux; /* pAux passed to create_module() */
void (*xDestroy)(void *); /* Module destructor function */
Table *pEpoTab; /* Eponymous table for this module */
};
/*
** Information about each column of an SQL table is held in an instance
** of the Column structure, in the Table.aCol[] array.
**
** Definitions:
**
** "table column index" This is the index of the column in the
** Table.aCol[] array, and also the index of
** the column in the original CREATE TABLE stmt.
**
** "storage column index" This is the index of the column in the
** record BLOB generated by the OP_MakeRecord
** opcode. The storage column index is less than
** or equal to the table column index. It is
** equal if and only if there are no VIRTUAL
** columns to the left.
**
** Notes on zCnName:
** The zCnName field stores the name of the column, the datatype of the
** column, and the collating sequence for the column, in that order, all in
** a single allocation. Each string is 0x00 terminated. The datatype
** is only included if the COLFLAG_HASTYPE bit of colFlags is set and the
** collating sequence name is only included if the COLFLAG_HASCOLL bit is
** set.
*/
struct Column {
char *zCnName; /* Name of this column */
unsigned notNull :4; /* An OE_ code for handling a NOT NULL constraint */
unsigned eCType :4; /* One of the standard types */
char affinity; /* One of the SQLITE_AFF_... values */
u8 szEst; /* Est size of value in this column. sizeof(INT)==1 */
u8 hName; /* Column name hash for faster lookup */
u16 iDflt; /* 1-based index of DEFAULT. 0 means "none" */
u16 colFlags; /* Boolean properties. See COLFLAG_ defines below */
};
/* Allowed values for Column.eCType.
**
** Values must match entries in the global constant arrays
** sqlite3StdTypeLen[] and sqlite3StdType[]. Each value is one more
** than the offset into these arrays for the corresponding name.
** Adjust the SQLITE_N_STDTYPE value if adding or removing entries.
*/
#define COLTYPE_CUSTOM 0 /* Type appended to zName */
#define COLTYPE_ANY 1
#define COLTYPE_BLOB 2
#define COLTYPE_INT 3
#define COLTYPE_INTEGER 4
#define COLTYPE_REAL 5
#define COLTYPE_TEXT 6
#define SQLITE_N_STDTYPE 6 /* Number of standard types */
/* Allowed values for Column.colFlags.
**
** Constraints:
** TF_HasVirtual == COLFLAG_VIRTUAL
** TF_HasStored == COLFLAG_STORED
** TF_HasHidden == COLFLAG_HIDDEN
*/
#define COLFLAG_PRIMKEY 0x0001 /* Column is part of the primary key */
#define COLFLAG_HIDDEN 0x0002 /* A hidden column in a virtual table */
#define COLFLAG_HASTYPE 0x0004 /* Type name follows column name */
#define COLFLAG_UNIQUE 0x0008 /* Column def contains "UNIQUE" or "PK" */
#define COLFLAG_SORTERREF 0x0010 /* Use sorter-refs with this column */
#define COLFLAG_VIRTUAL 0x0020 /* GENERATED ALWAYS AS ... VIRTUAL */
#define COLFLAG_STORED 0x0040 /* GENERATED ALWAYS AS ... STORED */
#define COLFLAG_NOTAVAIL 0x0080 /* STORED column not yet calculated */
#define COLFLAG_BUSY 0x0100 /* Blocks recursion on GENERATED columns */
#define COLFLAG_HASCOLL 0x0200 /* Has collating sequence name in zCnName */
#define COLFLAG_NOEXPAND 0x0400 /* Omit this column when expanding "*" */
#define COLFLAG_GENERATED 0x0060 /* Combo: _STORED, _VIRTUAL */
#define COLFLAG_NOINSERT 0x0062 /* Combo: _HIDDEN, _STORED, _VIRTUAL */
/*
** A "Collating Sequence" is defined by an instance of the following
** structure. Conceptually, a collating sequence consists of a name and
** a comparison routine that defines the order of that sequence.
**
** If CollSeq.xCmp is NULL, it means that the
** collating sequence is undefined. Indices built on an undefined
** collating sequence may not be read or written.
*/
struct CollSeq {
char *zName; /* Name of the collating sequence, UTF-8 encoded */
u8 enc; /* Text encoding handled by xCmp() */
void *pUser; /* First argument to xCmp() */
int (*xCmp)(void*,int, const void*, int, const void*);
void (*xDel)(void*); /* Destructor for pUser */
};
/*
** A sort order can be either ASC or DESC.
*/
#define SQLITE_SO_ASC 0 /* Sort in ascending order */
#define SQLITE_SO_DESC 1 /* Sort in ascending order */
#define SQLITE_SO_UNDEFINED -1 /* No sort order specified */
/*
** Column affinity types.
**
** These used to have mnemonic name like 'i' for SQLITE_AFF_INTEGER and
** 't' for SQLITE_AFF_TEXT. But we can save a little space and improve
** the speed a little by numbering the values consecutively.
**
** But rather than start with 0 or 1, we begin with 'A'. That way,
** when multiple affinity types are concatenated into a string and
** used as the P4 operand, they will be more readable.
**
** Note also that the numeric types are grouped together so that testing
** for a numeric type is a single comparison. And the BLOB type is first.
*/
#define SQLITE_AFF_NONE 0x40 /* '@' */
#define SQLITE_AFF_BLOB 0x41 /* 'A' */
#define SQLITE_AFF_TEXT 0x42 /* 'B' */
#define SQLITE_AFF_NUMERIC 0x43 /* 'C' */
#define SQLITE_AFF_INTEGER 0x44 /* 'D' */
#define SQLITE_AFF_REAL 0x45 /* 'E' */
#define sqlite3IsNumericAffinity(X) ((X)>=SQLITE_AFF_NUMERIC)
/*
** The SQLITE_AFF_MASK values masks off the significant bits of an
** affinity value.
*/
#define SQLITE_AFF_MASK 0x47
/*
** Additional bit values that can be ORed with an affinity without
** changing the affinity.
**
** The SQLITE_NOTNULL flag is a combination of NULLEQ and JUMPIFNULL.
** It causes an assert() to fire if either operand to a comparison
** operator is NULL. It is added to certain comparison operators to
** prove that the operands are always NOT NULL.
*/
#define SQLITE_JUMPIFNULL 0x10 /* jumps if either operand is NULL */
#define SQLITE_NULLEQ 0x80 /* NULL=NULL */
#define SQLITE_NOTNULL 0x90 /* Assert that operands are never NULL */
/*
** An object of this type is created for each virtual table present in
** the database schema.
**
** If the database schema is shared, then there is one instance of this
** structure for each database connection (sqlite3*) that uses the shared
** schema. This is because each database connection requires its own unique
** instance of the sqlite3_vtab* handle used to access the virtual table
** implementation. sqlite3_vtab* handles can not be shared between
** database connections, even when the rest of the in-memory database
** schema is shared, as the implementation often stores the database
** connection handle passed to it via the xConnect() or xCreate() method
** during initialization internally. This database connection handle may
** then be used by the virtual table implementation to access real tables
** within the database. So that they appear as part of the callers
** transaction, these accesses need to be made via the same database
** connection as that used to execute SQL operations on the virtual table.
**
** All VTable objects that correspond to a single table in a shared
** database schema are initially stored in a linked-list pointed to by
** the Table.pVTable member variable of the corresponding Table object.
** When an sqlite3_prepare() operation is required to access the virtual
** table, it searches the list for the VTable that corresponds to the
** database connection doing the preparing so as to use the correct
** sqlite3_vtab* handle in the compiled query.
**
** When an in-memory Table object is deleted (for example when the
** schema is being reloaded for some reason), the VTable objects are not
** deleted and the sqlite3_vtab* handles are not xDisconnect()ed
** immediately. Instead, they are moved from the Table.pVTable list to
** another linked list headed by the sqlite3.pDisconnect member of the
** corresponding sqlite3 structure. They are then deleted/xDisconnected
** next time a statement is prepared using said sqlite3*. This is done
** to avoid deadlock issues involving multiple sqlite3.mutex mutexes.
** Refer to comments above function sqlite3VtabUnlockList() for an
** explanation as to why it is safe to add an entry to an sqlite3.pDisconnect
** list without holding the corresponding sqlite3.mutex mutex.
**
** The memory for objects of this type is always allocated by
** sqlite3DbMalloc(), using the connection handle stored in VTable.db as
** the first argument.
*/
struct VTable {
sqlite3 *db; /* Database connection associated with this table */
Module *pMod; /* Pointer to module implementation */
sqlite3_vtab *pVtab; /* Pointer to vtab instance */
int nRef; /* Number of pointers to this structure */
u8 bConstraint; /* True if constraints are supported */
u8 eVtabRisk; /* Riskiness of allowing hacker access */
int iSavepoint; /* Depth of the SAVEPOINT stack */
VTable *pNext; /* Next in linked list (see above) */
};
/* Allowed values for VTable.eVtabRisk
*/
#define SQLITE_VTABRISK_Low 0
#define SQLITE_VTABRISK_Normal 1
#define SQLITE_VTABRISK_High 2
/*
** The schema for each SQL table, virtual table, and view is represented
** in memory by an instance of the following structure.
*/
struct Table {
char *zName; /* Name of the table or view */
Column *aCol; /* Information about each column */
Index *pIndex; /* List of SQL indexes on this table. */
char *zColAff; /* String defining the affinity of each column */
ExprList *pCheck; /* All CHECK constraints */
/* ... also used as column name list in a VIEW */
Pgno tnum; /* Root BTree page for this table */
u32 nTabRef; /* Number of pointers to this Table */
u32 tabFlags; /* Mask of TF_* values */
i16 iPKey; /* If not negative, use aCol[iPKey] as the rowid */
i16 nCol; /* Number of columns in this table */
i16 nNVCol; /* Number of columns that are not VIRTUAL */
LogEst nRowLogEst; /* Estimated rows in table - from sqlite_stat1 table */
LogEst szTabRow; /* Estimated size of each table row in bytes */
#ifdef SQLITE_ENABLE_COSTMULT
LogEst costMult; /* Cost multiplier for using this table */
#endif
u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
u8 eTabType; /* 0: normal, 1: virtual, 2: view */
union {
struct { /* Used by ordinary tables: */
int addColOffset; /* Offset in CREATE TABLE stmt to add a new column */
FKey *pFKey; /* Linked list of all foreign keys in this table */
ExprList *pDfltList; /* DEFAULT clauses on various columns.
** Or the AS clause for generated columns. */
} tab;
struct { /* Used by views: */
Select *pSelect; /* View definition */
} view;
struct { /* Used by virtual tables only: */
int nArg; /* Number of arguments to the module */
char **azArg; /* 0: module 1: schema 2: vtab name 3...: args */
VTable *p; /* List of VTable objects. */
} vtab;
} u;
Trigger *pTrigger; /* List of triggers on this object */
Schema *pSchema; /* Schema that contains this table */
};
/*
** Allowed values for Table.tabFlags.
**
** TF_OOOHidden applies to tables or view that have hidden columns that are
** followed by non-hidden columns. Example: "CREATE VIRTUAL TABLE x USING
** vtab1(a HIDDEN, b);". Since "b" is a non-hidden column but "a" is hidden,
** the TF_OOOHidden attribute would apply in this case. Such tables require
** special handling during INSERT processing. The "OOO" means "Out Of Order".
**
** Constraints:
**
** TF_HasVirtual == COLFLAG_VIRTUAL
** TF_HasStored == COLFLAG_STORED
** TF_HasHidden == COLFLAG_HIDDEN
*/
#define TF_Readonly 0x00000001 /* Read-only system table */
#define TF_HasHidden 0x00000002 /* Has one or more hidden columns */
#define TF_HasPrimaryKey 0x00000004 /* Table has a primary key */
#define TF_Autoincrement 0x00000008 /* Integer primary key is autoincrement */
#define TF_HasStat1 0x00000010 /* nRowLogEst set from sqlite_stat1 */
#define TF_HasVirtual 0x00000020 /* Has one or more VIRTUAL columns */
#define TF_HasStored 0x00000040 /* Has one or more STORED columns */
#define TF_HasGenerated 0x00000060 /* Combo: HasVirtual + HasStored */
#define TF_WithoutRowid 0x00000080 /* No rowid. PRIMARY KEY is the key */
#define TF_StatsUsed 0x00000100 /* Query planner decisions affected by
** Index.aiRowLogEst[] values */
#define TF_NoVisibleRowid 0x00000200 /* No user-visible "rowid" column */
#define TF_OOOHidden 0x00000400 /* Out-of-Order hidden columns */
#define TF_HasNotNull 0x00000800 /* Contains NOT NULL constraints */
#define TF_Shadow 0x00001000 /* True for a shadow table */
#define TF_HasStat4 0x00002000 /* STAT4 info available for this table */
#define TF_Ephemeral 0x00004000 /* An ephemeral table */
#define TF_Eponymous 0x00008000 /* An eponymous virtual table */
#define TF_Strict 0x00010000 /* STRICT mode */
/*
** Allowed values for Table.eTabType
*/
#define TABTYP_NORM 0 /* Ordinary table */
#define TABTYP_VTAB 1 /* Virtual table */
#define TABTYP_VIEW 2 /* A view */
#define IsView(X) ((X)->eTabType==TABTYP_VIEW)
#define IsOrdinaryTable(X) ((X)->eTabType==TABTYP_NORM)
/*
** Test to see whether or not a table is a virtual table. This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
# define IsVirtual(X) ((X)->eTabType==TABTYP_VTAB)
# define ExprIsVtab(X) \
((X)->op==TK_COLUMN && (X)->y.pTab!=0 && (X)->y.pTab->eTabType==TABTYP_VTAB)
#else
# define IsVirtual(X) 0
# define ExprIsVtab(X) 0
#endif
/*
** Macros to determine if a column is hidden. IsOrdinaryHiddenColumn()
** only works for non-virtual tables (ordinary tables and views) and is
** always false unless SQLITE_ENABLE_HIDDEN_COLUMNS is defined. The
** IsHiddenColumn() macro is general purpose.
*/
#if defined(SQLITE_ENABLE_HIDDEN_COLUMNS)
# define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0)
# define IsOrdinaryHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0)
#elif !defined(SQLITE_OMIT_VIRTUALTABLE)
# define IsHiddenColumn(X) (((X)->colFlags & COLFLAG_HIDDEN)!=0)
# define IsOrdinaryHiddenColumn(X) 0
#else
# define IsHiddenColumn(X) 0
# define IsOrdinaryHiddenColumn(X) 0
#endif
/* Does the table have a rowid */
#define HasRowid(X) (((X)->tabFlags & TF_WithoutRowid)==0)
#define VisibleRowid(X) (((X)->tabFlags & TF_NoVisibleRowid)==0)
/*
** Each foreign key constraint is an instance of the following structure.
**
** A foreign key is associated with two tables. The "from" table is
** the table that contains the REFERENCES clause that creates the foreign
** key. The "to" table is the table that is named in the REFERENCES clause.
** Consider this example:
**
** CREATE TABLE ex1(
** a INTEGER PRIMARY KEY,
** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
** );
**
** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
** Equivalent names:
**
** from-table == child-table
** to-table == parent-table
**
** Each REFERENCES clause generates an instance of the following structure
** which is attached to the from-table. The to-table need not exist when
** the from-table is created. The existence of the to-table is not checked.
**
** The list of all parents for child Table X is held at X.pFKey.
**
** A list of all children for a table named Z (which might not even exist)
** is held in Schema.fkeyHash with a hash key of Z.
*/
struct FKey {
Table *pFrom; /* Table containing the REFERENCES clause (aka: Child) */
FKey *pNextFrom; /* Next FKey with the same in pFrom. Next parent of pFrom */
char *zTo; /* Name of table that the key points to (aka: Parent) */
FKey *pNextTo; /* Next with the same zTo. Next child of zTo. */
FKey *pPrevTo; /* Previous with the same zTo */
int nCol; /* Number of columns in this key */
/* EV: R-30323-21917 */
u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
u8 aAction[2]; /* ON DELETE and ON UPDATE actions, respectively */
Trigger *apTrigger[2];/* Triggers for aAction[] actions */
struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
int iFrom; /* Index of column in pFrom */
char *zCol; /* Name of column in zTo. If NULL use PRIMARY KEY */
} aCol[1]; /* One entry for each of nCol columns */
};
/*
** SQLite supports many different ways to resolve a constraint
** error. ROLLBACK processing means that a constraint violation
** causes the operation in process to fail and for the current transaction
** to be rolled back. ABORT processing means the operation in process
** fails and any prior changes from that one operation are backed out,
** but the transaction is not rolled back. FAIL processing means that
** the operation in progress stops and returns an error code. But prior
** changes due to the same operation are not backed out and no rollback
** occurs. IGNORE means that the particular row that caused the constraint
** error is not inserted or updated. Processing continues and no error
** is returned. REPLACE means that preexisting database rows that caused
** a UNIQUE constraint violation are removed so that the new insert or
** update can proceed. Processing continues and no error is reported.
** UPDATE applies to insert operations only and means that the insert
** is omitted and the DO UPDATE clause of an upsert is run instead.
**
** RESTRICT, SETNULL, SETDFLT, and CASCADE actions apply only to foreign keys.
** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
** key is set to NULL. SETDFLT means that the foreign key is set
** to its default value. CASCADE means that a DELETE or UPDATE of the
** referenced table row is propagated into the row that holds the
** foreign key.
**
** The OE_Default value is a place holder that means to use whatever
** conflict resolution algorthm is required from context.
**
** The following symbolic values are used to record which type
** of conflict resolution action to take.
*/
#define OE_None 0 /* There is no constraint to check */
#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
#define OE_Abort 2 /* Back out changes but do no rollback transaction */
#define OE_Fail 3 /* Stop the operation but leave all prior changes */
#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
#define OE_Update 6 /* Process as a DO UPDATE in an upsert */
#define OE_Restrict 7 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
#define OE_SetNull 8 /* Set the foreign key value to NULL */
#define OE_SetDflt 9 /* Set the foreign key value to its default */
#define OE_Cascade 10 /* Cascade the changes */
#define OE_Default 11 /* Do whatever the default action is */
/*
** An instance of the following structure is passed as the first
** argument to sqlite3VdbeKeyCompare and is used to control the
** comparison of the two index keys.
**
** Note that aSortOrder[] and aColl[] have nField+1 slots. There
** are nField slots for the columns of an index then one extra slot
** for the rowid at the end.
*/
struct KeyInfo {
u32 nRef; /* Number of references to this KeyInfo object */
u8 enc; /* Text encoding - one of the SQLITE_UTF* values */
u16 nKeyField; /* Number of key columns in the index */
u16 nAllField; /* Total columns, including key plus others */
sqlite3 *db; /* The database connection */
u8 *aSortFlags; /* Sort order for each column. */
CollSeq *aColl[1]; /* Collating sequence for each term of the key */
};
/*
** Allowed bit values for entries in the KeyInfo.aSortFlags[] array.
*/
#define KEYINFO_ORDER_DESC 0x01 /* DESC sort order */
#define KEYINFO_ORDER_BIGNULL 0x02 /* NULL is larger than any other value */
/*
** This object holds a record which has been parsed out into individual
** fields, for the purposes of doing a comparison.
**
** A record is an object that contains one or more fields of data.
** Records are used to store the content of a table row and to store
** the key of an index. A blob encoding of a record is created by
** the OP_MakeRecord opcode of the VDBE and is disassembled by the
** OP_Column opcode.
**
** An instance of this object serves as a "key" for doing a search on
** an index b+tree. The goal of the search is to find the entry that
** is closed to the key described by this object. This object might hold
** just a prefix of the key. The number of fields is given by
** pKeyInfo->nField.
**
** The r1 and r2 fields are the values to return if this key is less than
** or greater than a key in the btree, respectively. These are normally
** -1 and +1 respectively, but might be inverted to +1 and -1 if the b-tree
** is in DESC order.
**
** The key comparison functions actually return default_rc when they find
** an equals comparison. default_rc can be -1, 0, or +1. If there are
** multiple entries in the b-tree with the same key (when only looking
** at the first pKeyInfo->nFields,) then default_rc can be set to -1 to
** cause the search to find the last match, or +1 to cause the search to
** find the first match.
**
** The key comparison functions will set eqSeen to true if they ever
** get and equal results when comparing this structure to a b-tree record.
** When default_rc!=0, the search might end up on the record immediately
** before the first match or immediately after the last match. The
** eqSeen field will indicate whether or not an exact match exists in the
** b-tree.
*/
struct UnpackedRecord {
KeyInfo *pKeyInfo; /* Collation and sort-order information */
Mem *aMem; /* Values */
union {
char *z; /* Cache of aMem[0].z for vdbeRecordCompareString() */
i64 i; /* Cache of aMem[0].u.i for vdbeRecordCompareInt() */
} u;
int n; /* Cache of aMem[0].n used by vdbeRecordCompareString() */
u16 nField; /* Number of entries in apMem[] */
i8 default_rc; /* Comparison result if keys are equal */
u8 errCode; /* Error detected by xRecordCompare (CORRUPT or NOMEM) */
i8 r1; /* Value to return if (lhs < rhs) */
i8 r2; /* Value to return if (lhs > rhs) */
u8 eqSeen; /* True if an equality comparison has been seen */
};
/*
** Each SQL index is represented in memory by an
** instance of the following structure.
**
** The columns of the table that are to be indexed are described
** by the aiColumn[] field of this structure. For example, suppose
** we have the following table and index:
**
** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
** CREATE INDEX Ex2 ON Ex1(c3,c1);
**
** In the Table structure describing Ex1, nCol==3 because there are
** three columns in the table. In the Index structure describing
** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
** The second column to be indexed (c1) has an index of 0 in
** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
**
** The Index.onError field determines whether or not the indexed columns
** must be unique and what to do if they are not. When Index.onError=OE_None,
** it means this is not a unique index. Otherwise it is a unique index
** and the value of Index.onError indicate the which conflict resolution
** algorithm to employ whenever an attempt is made to insert a non-unique
** element.
**
** While parsing a CREATE TABLE or CREATE INDEX statement in order to
** generate VDBE code (as opposed to parsing one read from an sqlite_schema
** table as part of parsing an existing database schema), transient instances
** of this structure may be created. In this case the Index.tnum variable is
** used to store the address of a VDBE instruction, not a database page
** number (it cannot - the database page is not allocated until the VDBE
** program is executed). See convertToWithoutRowidTable() for details.
*/
struct Index {
char *zName; /* Name of this index */
i16 *aiColumn; /* Which columns are used by this index. 1st is 0 */
LogEst *aiRowLogEst; /* From ANALYZE: Est. rows selected by each column */
Table *pTable; /* The SQL table being indexed */
char *zColAff; /* String defining the affinity of each column */
Index *pNext; /* The next index associated with the same table */
Schema *pSchema; /* Schema containing this index */
u8 *aSortOrder; /* for each column: True==DESC, False==ASC */
const char **azColl; /* Array of collation sequence names for index */
Expr *pPartIdxWhere; /* WHERE clause for partial indices */
ExprList *aColExpr; /* Column expressions */
Pgno tnum; /* DB Page containing root of this index */
LogEst szIdxRow; /* Estimated average row size in bytes */
u16 nKeyCol; /* Number of columns forming the key */
u16 nColumn; /* Number of columns stored in the index */
u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
unsigned idxType:2; /* 0:Normal 1:UNIQUE, 2:PRIMARY KEY, 3:IPK */
unsigned bUnordered:1; /* Use this index for == or IN queries only */
unsigned uniqNotNull:1; /* True if UNIQUE and NOT NULL for all columns */
unsigned isResized:1; /* True if resizeIndexObject() has been called */
unsigned isCovering:1; /* True if this is a covering index */
unsigned noSkipScan:1; /* Do not try to use skip-scan if true */
unsigned hasStat1:1; /* aiRowLogEst values come from sqlite_stat1 */
unsigned bNoQuery:1; /* Do not use this index to optimize queries */
unsigned bAscKeyBug:1; /* True if the bba7b69f9849b5bf bug applies */
unsigned bHasVCol:1; /* Index references one or more VIRTUAL columns */
#ifdef SQLITE_ENABLE_STAT4
int nSample; /* Number of elements in aSample[] */
int nSampleCol; /* Size of IndexSample.anEq[] and so on */
tRowcnt *aAvgEq; /* Average nEq values for keys not in aSample */
IndexSample *aSample; /* Samples of the left-most key */
tRowcnt *aiRowEst; /* Non-logarithmic stat1 data for this index */
tRowcnt nRowEst0; /* Non-logarithmic number of rows in the index */
#endif
Bitmask colNotIdxed; /* 0 for unindexed columns in pTab */
};
/*
** Allowed values for Index.idxType
*/
#define SQLITE_IDXTYPE_APPDEF 0 /* Created using CREATE INDEX */
#define SQLITE_IDXTYPE_UNIQUE 1 /* Implements a UNIQUE constraint */
#define SQLITE_IDXTYPE_PRIMARYKEY 2 /* Is the PRIMARY KEY for the table */
#define SQLITE_IDXTYPE_IPK 3 /* INTEGER PRIMARY KEY index */
/* Return true if index X is a PRIMARY KEY index */
#define IsPrimaryKeyIndex(X) ((X)->idxType==SQLITE_IDXTYPE_PRIMARYKEY)
/* Return true if index X is a UNIQUE index */
#define IsUniqueIndex(X) ((X)->onError!=OE_None)
/* The Index.aiColumn[] values are normally positive integer. But
** there are some negative values that have special meaning:
*/
#define XN_ROWID (-1) /* Indexed column is the rowid */
#define XN_EXPR (-2) /* Indexed column is an expression */
/*
** Each sample stored in the sqlite_stat4 table is represented in memory
** using a structure of this type. See documentation at the top of the
** analyze.c source file for additional information.
*/
struct IndexSample {
void *p; /* Pointer to sampled record */
int n; /* Size of record in bytes */
tRowcnt *anEq; /* Est. number of rows where the key equals this sample */
tRowcnt *anLt; /* Est. number of rows where key is less than this sample */
tRowcnt *anDLt; /* Est. number of distinct keys less than this sample */
};
/*
** Possible values to use within the flags argument to sqlite3GetToken().
*/
#define SQLITE_TOKEN_QUOTED 0x1 /* Token is a quoted identifier. */
#define SQLITE_TOKEN_KEYWORD 0x2 /* Token is a keyword. */
/*
** Each token coming out of the lexer is an instance of
** this structure. Tokens are also used as part of an expression.
**
** The memory that "z" points to is owned by other objects. Take care
** that the owner of the "z" string does not deallocate the string before
** the Token goes out of scope! Very often, the "z" points to some place
** in the middle of the Parse.zSql text. But it might also point to a
** static string.
*/
struct Token {
const char *z; /* Text of the token. Not NULL-terminated! */
unsigned int n; /* Number of characters in this token */
};
/*
** An instance of this structure contains information needed to generate
** code for a SELECT that contains aggregate functions.
**
** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a
** pointer to this structure. The Expr.iAgg field is the index in
** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate
** code for that node.
**
** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the
** original Select structure that describes the SELECT statement. These
** fields do not need to be freed when deallocating the AggInfo structure.
*/
struct AggInfo {
u8 directMode; /* Direct rendering mode means take data directly
** from source tables rather than from accumulators */
u8 useSortingIdx; /* In direct mode, reference the sorting index rather
** than the source table */
int sortingIdx; /* Cursor number of the sorting index */
int sortingIdxPTab; /* Cursor number of pseudo-table */
int nSortingColumn; /* Number of columns in the sorting index */
int mnReg, mxReg; /* Range of registers allocated for aCol and aFunc */
ExprList *pGroupBy; /* The group by clause */
struct AggInfo_col { /* For each column used in source tables */
Table *pTab; /* Source table */
Expr *pCExpr; /* The original expression */
int iTable; /* Cursor number of the source table */
int iMem; /* Memory location that acts as accumulator */
i16 iColumn; /* Column number within the source table */
i16 iSorterColumn; /* Column number in the sorting index */
} *aCol;
int nColumn; /* Number of used entries in aCol[] */
int nAccumulator; /* Number of columns that show through to the output.
** Additional columns are used only as parameters to
** aggregate functions */
struct AggInfo_func { /* For each aggregate function */
Expr *pFExpr; /* Expression encoding the function */
FuncDef *pFunc; /* The aggregate function implementation */
int iMem; /* Memory location that acts as accumulator */
int iDistinct; /* Ephemeral table used to enforce DISTINCT */
int iDistAddr; /* Address of OP_OpenEphemeral */
} *aFunc;
int nFunc; /* Number of entries in aFunc[] */
u32 selId; /* Select to which this AggInfo belongs */
};
/*
** The datatype ynVar is a signed integer, either 16-bit or 32-bit.
** Usually it is 16-bits. But if SQLITE_MAX_VARIABLE_NUMBER is greater
** than 32767 we have to make it 32-bit. 16-bit is preferred because
** it uses less memory in the Expr object, which is a big memory user
** in systems with lots of prepared statements. And few applications
** need more than about 10 or 20 variables. But some extreme users want
** to have prepared statements with over 32766 variables, and for them
** the option is available (at compile-time).
*/
#if SQLITE_MAX_VARIABLE_NUMBER<32767
typedef i16 ynVar;
#else
typedef int ynVar;
#endif
/*
** Each node of an expression in the parse tree is an instance
** of this structure.
**
** Expr.op is the opcode. The integer parser token codes are reused
** as opcodes here. For example, the parser defines TK_GE to be an integer
** code representing the ">=" operator. This same integer code is reused
** to represent the greater-than-or-equal-to operator in the expression
** tree.
**
** If the expression is an SQL literal (TK_INTEGER, TK_FLOAT, TK_BLOB,
** or TK_STRING), then Expr.u.zToken contains the text of the SQL literal. If
** the expression is a variable (TK_VARIABLE), then Expr.u.zToken contains the
** variable name. Finally, if the expression is an SQL function (TK_FUNCTION),
** then Expr.u.zToken contains the name of the function.
**
** Expr.pRight and Expr.pLeft are the left and right subexpressions of a
** binary operator. Either or both may be NULL.
**
** Expr.x.pList is a list of arguments if the expression is an SQL function,
** a CASE expression or an IN expression of the form "<lhs> IN (<y>, <z>...)".
** Expr.x.pSelect is used if the expression is a sub-select or an expression of
** the form "<lhs> IN (SELECT ...)". If the EP_xIsSelect bit is set in the
** Expr.flags mask, then Expr.x.pSelect is valid. Otherwise, Expr.x.pList is
** valid.
**
** An expression of the form ID or ID.ID refers to a column in a table.
** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
** the integer cursor number of a VDBE cursor pointing to that table and
** Expr.iColumn is the column number for the specific column. If the
** expression is used as a result in an aggregate SELECT, then the
** value is also stored in the Expr.iAgg column in the aggregate so that
** it can be accessed after all aggregates are computed.
**
** If the expression is an unbound variable marker (a question mark
** character '?' in the original SQL) then the Expr.iTable holds the index
** number for that variable.
**
** If the expression is a subquery then Expr.iColumn holds an integer
** register number containing the result of the subquery. If the
** subquery gives a constant result, then iTable is -1. If the subquery
** gives a different answer at different times during statement processing
** then iTable is the address of a subroutine that computes the subquery.
**
** If the Expr is of type OP_Column, and the table it is selecting from
** is a disk table or the "old.*" pseudo-table, then pTab points to the
** corresponding table definition.
**
** ALLOCATION NOTES:
**
** Expr objects can use a lot of memory space in database schema. To
** help reduce memory requirements, sometimes an Expr object will be
** truncated. And to reduce the number of memory allocations, sometimes
** two or more Expr objects will be stored in a single memory allocation,
** together with Expr.u.zToken strings.
**
** If the EP_Reduced and EP_TokenOnly flags are set when
** an Expr object is truncated. When EP_Reduced is set, then all
** the child Expr objects in the Expr.pLeft and Expr.pRight subtrees
** are contained within the same memory allocation. Note, however, that
** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately
** allocated, regardless of whether or not EP_Reduced is set.
*/
struct Expr {
u8 op; /* Operation performed by this node */
char affExpr; /* affinity, or RAISE type */
u8 op2; /* TK_REGISTER/TK_TRUTH: original value of Expr.op
** TK_COLUMN: the value of p5 for OP_Column
** TK_AGG_FUNCTION: nesting depth
** TK_FUNCTION: NC_SelfRef flag if needs OP_PureFunc */
#ifdef SQLITE_DEBUG
u8 vvaFlags; /* Verification flags. */
#endif
u32 flags; /* Various flags. EP_* See below */
union {
char *zToken; /* Token value. Zero terminated and dequoted */
int iValue; /* Non-negative integer value if EP_IntValue */
} u;
/* If the EP_TokenOnly flag is set in the Expr.flags mask, then no
** space is allocated for the fields below this point. An attempt to
** access them will result in a segfault or malfunction.
*********************************************************************/
Expr *pLeft; /* Left subnode */
Expr *pRight; /* Right subnode */
union {
ExprList *pList; /* op = IN, EXISTS, SELECT, CASE, FUNCTION, BETWEEN */
Select *pSelect; /* EP_xIsSelect and op = IN, EXISTS, SELECT */
} x;
/* If the EP_Reduced flag is set in the Expr.flags mask, then no
** space is allocated for the fields below this point. An attempt to
** access them will result in a segfault or malfunction.
*********************************************************************/
#if SQLITE_MAX_EXPR_DEPTH>0
int nHeight; /* Height of the tree headed by this node */
#endif
int iTable; /* TK_COLUMN: cursor number of table holding column
** TK_REGISTER: register number
** TK_TRIGGER: 1 -> new, 0 -> old
** EP_Unlikely: 134217728 times likelihood
** TK_IN: ephemerial table holding RHS
** TK_SELECT_COLUMN: Number of columns on the LHS
** TK_SELECT: 1st register of result vector */
ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid.
** TK_VARIABLE: variable number (always >= 1).
** TK_SELECT_COLUMN: column of the result vector */
i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
union {
int iJoin; /* If EP_OuterON or EP_InnerON, the right table */
int iOfst; /* else: start of token from start of statement */
} w;
AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
union {
Table *pTab; /* TK_COLUMN: Table containing column. Can be NULL
** for a column of an index on an expression */
Window *pWin; /* EP_WinFunc: Window/Filter defn for a function */
struct { /* TK_IN, TK_SELECT, and TK_EXISTS */
int iAddr; /* Subroutine entry address */
int regReturn; /* Register used to hold return address */
} sub;
} y;
};
/* The following are the meanings of bits in the Expr.flags field.
** Value restrictions:
**
** EP_Agg == NC_HasAgg == SF_HasAgg
** EP_Win == NC_HasWin
*/
#define EP_OuterON 0x000001 /* Originates in ON/USING clause of outer join */
#define EP_InnerON 0x000002 /* Originates in ON/USING of an inner join */
#define EP_Distinct 0x000004 /* Aggregate function with DISTINCT keyword */
#define EP_HasFunc 0x000008 /* Contains one or more functions of any kind */
#define EP_Agg 0x000010 /* Contains one or more aggregate functions */
#define EP_FixedCol 0x000020 /* TK_Column with a known fixed value */
#define EP_VarSelect 0x000040 /* pSelect is correlated, not constant */
#define EP_DblQuoted 0x000080 /* token.z was originally in "..." */
#define EP_InfixFunc 0x000100 /* True for an infix function: LIKE, GLOB, etc */
#define EP_Collate 0x000200 /* Tree contains a TK_COLLATE operator */
#define EP_Commuted 0x000400 /* Comparison operator has been commuted */
#define EP_IntValue 0x000800 /* Integer value contained in u.iValue */
#define EP_xIsSelect 0x001000 /* x.pSelect is valid (otherwise x.pList is) */
#define EP_Skip 0x002000 /* Operator does not contribute to affinity */
#define EP_Reduced 0x004000 /* Expr struct EXPR_REDUCEDSIZE bytes only */
#define EP_Win 0x008000 /* Contains window functions */
#define EP_TokenOnly 0x010000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */
#define EP_MemToken 0x020000 /* Need to sqlite3DbFree() Expr.zToken */
#define EP_IfNullRow 0x040000 /* The TK_IF_NULL_ROW opcode */
#define EP_Unlikely 0x080000 /* unlikely() or likelihood() function */
#define EP_ConstFunc 0x100000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
#define EP_CanBeNull 0x200000 /* Can be null despite NOT NULL constraint */
#define EP_Subquery 0x400000 /* Tree contains a TK_SELECT operator */
#define EP_Leaf 0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */
#define EP_WinFunc 0x1000000 /* TK_FUNCTION with Expr.y.pWin set */
#define EP_Subrtn 0x2000000 /* Uses Expr.y.sub. TK_IN, _SELECT, or _EXISTS */
#define EP_Quoted 0x4000000 /* TK_ID was originally quoted */
#define EP_Static 0x8000000 /* Held in memory not obtained from malloc() */
#define EP_IsTrue 0x10000000 /* Always has boolean value of TRUE */
#define EP_IsFalse 0x20000000 /* Always has boolean value of FALSE */
#define EP_FromDDL 0x40000000 /* Originates from sqlite_schema */
/* 0x80000000 // Available */
/* The EP_Propagate mask is a set of properties that automatically propagate
** upwards into parent nodes.
*/
#define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc)
/* Macros can be used to test, set, or clear bits in the
** Expr.flags field.
*/
#define ExprHasProperty(E,P) (((E)->flags&(P))!=0)
#define ExprHasAllProperty(E,P) (((E)->flags&(P))==(P))
#define ExprSetProperty(E,P) (E)->flags|=(P)
#define ExprClearProperty(E,P) (E)->flags&=~(P)
#define ExprAlwaysTrue(E) (((E)->flags&(EP_OuterON|EP_IsTrue))==EP_IsTrue)
#define ExprAlwaysFalse(E) (((E)->flags&(EP_OuterON|EP_IsFalse))==EP_IsFalse)
/* Macros used to ensure that the correct members of unions are accessed
** in Expr.
*/
#define ExprUseUToken(E) (((E)->flags&EP_IntValue)==0)
#define ExprUseUValue(E) (((E)->flags&EP_IntValue)!=0)
#define ExprUseXList(E) (((E)->flags&EP_xIsSelect)==0)
#define ExprUseXSelect(E) (((E)->flags&EP_xIsSelect)!=0)
#define ExprUseYTab(E) (((E)->flags&(EP_WinFunc|EP_Subrtn))==0)
#define ExprUseYWin(E) (((E)->flags&EP_WinFunc)!=0)
#define ExprUseYSub(E) (((E)->flags&EP_Subrtn)!=0)
/* Flags for use with Expr.vvaFlags
*/
#define EP_NoReduce 0x01 /* Cannot EXPRDUP_REDUCE this Expr */
#define EP_Immutable 0x02 /* Do not change this Expr node */
/* The ExprSetVVAProperty() macro is used for Verification, Validation,
** and Accreditation only. It works like ExprSetProperty() during VVA
** processes but is a no-op for delivery.
*/
#ifdef SQLITE_DEBUG
# define ExprSetVVAProperty(E,P) (E)->vvaFlags|=(P)
# define ExprHasVVAProperty(E,P) (((E)->vvaFlags&(P))!=0)
# define ExprClearVVAProperties(E) (E)->vvaFlags = 0
#else
# define ExprSetVVAProperty(E,P)
# define ExprHasVVAProperty(E,P) 0
# define ExprClearVVAProperties(E)
#endif
/*
** Macros to determine the number of bytes required by a normal Expr
** struct, an Expr struct with the EP_Reduced flag set in Expr.flags
** and an Expr struct with the EP_TokenOnly flag set.
*/
#define EXPR_FULLSIZE sizeof(Expr) /* Full size */
#define EXPR_REDUCEDSIZE offsetof(Expr,iTable) /* Common features */
#define EXPR_TOKENONLYSIZE offsetof(Expr,pLeft) /* Fewer features */
/*
** Flags passed to the sqlite3ExprDup() function. See the header comment
** above sqlite3ExprDup() for details.
*/
#define EXPRDUP_REDUCE 0x0001 /* Used reduced-size Expr nodes */
/*
** True if the expression passed as an argument was a function with
** an OVER() clause (a window function).
*/
#ifdef SQLITE_OMIT_WINDOWFUNC
# define IsWindowFunc(p) 0
#else
# define IsWindowFunc(p) ( \
ExprHasProperty((p), EP_WinFunc) && p->y.pWin->eFrmType!=TK_FILTER \
)
#endif
/*
** A list of expressions. Each expression may optionally have a
** name. An expr/name combination can be used in several ways, such
** as the list of "expr AS ID" fields following a "SELECT" or in the
** list of "ID = expr" items in an UPDATE. A list of expressions can
** also be used as the argument to a function, in which case the a.zName
** field is not used.
**
** In order to try to keep memory usage down, the Expr.a.zEName field
** is used for multiple purposes:
**
** eEName Usage
** ---------- -------------------------
** ENAME_NAME (1) the AS of result set column
** (2) COLUMN= of an UPDATE
**
** ENAME_TAB DB.TABLE.NAME used to resolve names
** of subqueries
**
** ENAME_SPAN Text of the original result set
** expression.
*/
struct ExprList {
int nExpr; /* Number of expressions on the list */
int nAlloc; /* Number of a[] slots allocated */
struct ExprList_item { /* For each expression in the list */
Expr *pExpr; /* The parse tree for this expression */
char *zEName; /* Token associated with this expression */
struct {
u8 sortFlags; /* Mask of KEYINFO_ORDER_* flags */
unsigned eEName :2; /* Meaning of zEName */
unsigned done :1; /* Indicates when processing is finished */
unsigned reusable :1; /* Constant expression is reusable */
unsigned bSorterRef :1; /* Defer evaluation until after sorting */
unsigned bNulls :1; /* True if explicit "NULLS FIRST/LAST" */
unsigned bUsed :1; /* This column used in a SF_NestedFrom subquery */
unsigned bUsingTerm:1; /* Term from the USING clause of a NestedFrom */
unsigned bNoExpand: 1; /* Term is an auxiliary in NestedFrom and should
** not be expanded by "*" in parent queries */
} fg;
union {
struct { /* Used by any ExprList other than Parse.pConsExpr */
u16 iOrderByCol; /* For ORDER BY, column number in result set */
u16 iAlias; /* Index into Parse.aAlias[] for zName */
} x;
int iConstExprReg; /* Register in which Expr value is cached. Used only
** by Parse.pConstExpr */
} u;
} a[1]; /* One slot for each expression in the list */
};
/*
** Allowed values for Expr.a.eEName
*/
#define ENAME_NAME 0 /* The AS clause of a result set */
#define ENAME_SPAN 1 /* Complete text of the result set expression */
#define ENAME_TAB 2 /* "DB.TABLE.NAME" for the result set */
/*
** An instance of this structure can hold a simple list of identifiers,
** such as the list "a,b,c" in the following statements:
**
** INSERT INTO t(a,b,c) VALUES ...;
** CREATE INDEX idx ON t(a,b,c);
** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
**
** The IdList.a.idx field is used when the IdList represents the list of
** column names after a table name in an INSERT statement. In the statement
**
** INSERT INTO t(a,b,c) ...
**
** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
*/
struct IdList {
int nId; /* Number of identifiers on the list */
u8 eU4; /* Which element of a.u4 is valid */
struct IdList_item {
char *zName; /* Name of the identifier */
union {
int idx; /* Index in some Table.aCol[] of a column named zName */
Expr *pExpr; /* Expr to implement a USING variable -- NOT USED */
} u4;
} a[1];
};
/*
** Allowed values for IdList.eType, which determines which value of the a.u4
** is valid.
*/
#define EU4_NONE 0 /* Does not use IdList.a.u4 */
#define EU4_IDX 1 /* Uses IdList.a.u4.idx */
#define EU4_EXPR 2 /* Uses IdList.a.u4.pExpr -- NOT CURRENTLY USED */
/*
** The SrcItem object represents a single term in the FROM clause of a query.
** The SrcList object is mostly an array of SrcItems.
**
** Union member validity:
**
** u1.zIndexedBy fg.isIndexedBy && !fg.isTabFunc
** u1.pFuncArg fg.isTabFunc && !fg.isIndexedBy
** u2.pIBIndex fg.isIndexedBy && !fg.isCte
** u2.pCteUse fg.isCte && !fg.isIndexedBy
*/
struct SrcItem {
Schema *pSchema; /* Schema to which this item is fixed */
char *zDatabase; /* Name of database holding this table */
char *zName; /* Name of the table */
char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
Table *pTab; /* An SQL table corresponding to zName */
Select *pSelect; /* A SELECT statement used in place of a table name */
int addrFillSub; /* Address of subroutine to manifest a subquery */
int regReturn; /* Register holding return address of addrFillSub */
int regResult; /* Registers holding results of a co-routine */
struct {
u8 jointype; /* Type of join between this table and the previous */
unsigned notIndexed :1; /* True if there is a NOT INDEXED clause */
unsigned isIndexedBy :1; /* True if there is an INDEXED BY clause */
unsigned isTabFunc :1; /* True if table-valued-function syntax */
unsigned isCorrelated :1; /* True if sub-query is correlated */
unsigned isMaterialized:1; /* This is a materialized view */
unsigned viaCoroutine :1; /* Implemented as a co-routine */
unsigned isRecursive :1; /* True for recursive reference in WITH */
unsigned fromDDL :1; /* Comes from sqlite_schema */
unsigned isCte :1; /* This is a CTE */
unsigned notCte :1; /* This item may not match a CTE */
unsigned isUsing :1; /* u3.pUsing is valid */
unsigned isOn :1; /* u3.pOn was once valid and non-NULL */
unsigned isSynthUsing :1; /* u3.pUsing is synthensized from NATURAL */
unsigned isNestedFrom :1; /* pSelect is a SF_NestedFrom subquery */
} fg;
int iCursor; /* The VDBE cursor number used to access this table */
union {
Expr *pOn; /* fg.isUsing==0 => The ON clause of a join */
IdList *pUsing; /* fg.isUsing==1 => The USING clause of a join */
} u3;
Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */
union {
char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */
ExprList *pFuncArg; /* Arguments to table-valued-function */
} u1;
union {
Index *pIBIndex; /* Index structure corresponding to u1.zIndexedBy */
CteUse *pCteUse; /* CTE Usage info info fg.isCte is true */
} u2;
};
/*
** The OnOrUsing object represents either an ON clause or a USING clause.
** It can never be both at the same time, but it can be neither.
*/
struct OnOrUsing {
Expr *pOn; /* The ON clause of a join */
IdList *pUsing; /* The USING clause of a join */
};
/*
** The following structure describes the FROM clause of a SELECT statement.
** Each table or subquery in the FROM clause is a separate element of
** the SrcList.a[] array.
**
** With the addition of multiple database support, the following structure
** can also be used to describe a particular table such as the table that
** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
** such a table must be a simple name: ID. But in SQLite, the table can
** now be identified by a database name, a dot, then the table name: ID.ID.
**
** The jointype starts out showing the join type between the current table
** and the next table on the list. The parser builds the list this way.
** But sqlite3SrcListShiftJoinType() later shifts the jointypes so that each
** jointype expresses the join between the table and the previous table.
**
** In the colUsed field, the high-order bit (bit 63) is set if the table
** contains more than 63 columns and the 64-th or later column is used.
*/
struct SrcList {
int nSrc; /* Number of tables or subqueries in the FROM clause */
u32 nAlloc; /* Number of entries allocated in a[] below */
SrcItem a[1]; /* One entry for each identifier on the list */
};
/*
** Permitted values of the SrcList.a.jointype field
*/
#define JT_INNER 0x01 /* Any kind of inner or cross join */
#define JT_CROSS 0x02 /* Explicit use of the CROSS keyword */
#define JT_NATURAL 0x04 /* True for a "natural" join */
#define JT_LEFT 0x08 /* Left outer join */
#define JT_RIGHT 0x10 /* Right outer join */
#define JT_OUTER 0x20 /* The "OUTER" keyword is present */
#define JT_LTORJ 0x40 /* One of the LEFT operands of a RIGHT JOIN
** Mnemonic: Left Table Of Right Join */
#define JT_ERROR 0x80 /* unknown or unsupported join type */
/*
** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin()
** and the WhereInfo.wctrlFlags member.
**
** Value constraints (enforced via assert()):
** WHERE_USE_LIMIT == SF_FixedLimit
*/
#define WHERE_ORDERBY_NORMAL 0x0000 /* No-op */
#define WHERE_ORDERBY_MIN 0x0001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX 0x0002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED 0x0004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_ONEPASS_MULTIROW 0x0008 /* ONEPASS is ok with multiple rows */
#define WHERE_DUPLICATES_OK 0x0010 /* Ok to return a row more than once */
#define WHERE_OR_SUBCLAUSE 0x0020 /* Processing a sub-WHERE as part of
** the OR optimization */
#define WHERE_GROUPBY 0x0040 /* pOrderBy is really a GROUP BY */
#define WHERE_DISTINCTBY 0x0080 /* pOrderby is really a DISTINCT clause */
#define WHERE_WANT_DISTINCT 0x0100 /* All output needs to be distinct */
#define WHERE_SORTBYGROUP 0x0200 /* Support sqlite3WhereIsSorted() */
#define WHERE_AGG_DISTINCT 0x0400 /* Query is "SELECT agg(DISTINCT ...)" */
#define WHERE_ORDERBY_LIMIT 0x0800 /* ORDERBY+LIMIT on the inner loop */
#define WHERE_RIGHT_JOIN 0x1000 /* Processing a RIGHT JOIN */
/* 0x2000 not currently used */
#define WHERE_USE_LIMIT 0x4000 /* Use the LIMIT in cost estimates */
/* 0x8000 not currently used */
/* Allowed return values from sqlite3WhereIsDistinct()
*/
#define WHERE_DISTINCT_NOOP 0 /* DISTINCT keyword not used */
#define WHERE_DISTINCT_UNIQUE 1 /* No duplicates */
#define WHERE_DISTINCT_ORDERED 2 /* All duplicates are adjacent */
#define WHERE_DISTINCT_UNORDERED 3 /* Duplicates are scattered */
/*
** A NameContext defines a context in which to resolve table and column
** names. The context consists of a list of tables (the pSrcList) field and
** a list of named expression (pEList). The named expression list may
** be NULL. The pSrc corresponds to the FROM clause of a SELECT or
** to the table being operated on by INSERT, UPDATE, or DELETE. The
** pEList corresponds to the result set of a SELECT and is NULL for
** other statements.
**
** NameContexts can be nested. When resolving names, the inner-most
** context is searched first. If no match is found, the next outer
** context is checked. If there is still no match, the next context
** is checked. This process continues until either a match is found
** or all contexts are check. When a match is found, the nRef member of
** the context containing the match is incremented.
**
** Each subquery gets a new NameContext. The pNext field points to the
** NameContext in the parent query. Thus the process of scanning the
** NameContext list corresponds to searching through successively outer
** subqueries looking for a match.
*/
struct NameContext {
Parse *pParse; /* The parser */
SrcList *pSrcList; /* One or more tables used to resolve names */
union {
ExprList *pEList; /* Optional list of result-set columns */
AggInfo *pAggInfo; /* Information about aggregates at this level */
Upsert *pUpsert; /* ON CONFLICT clause information from an upsert */
int iBaseReg; /* For TK_REGISTER when parsing RETURNING */
} uNC;
NameContext *pNext; /* Next outer name context. NULL for outermost */
int nRef; /* Number of names resolved by this context */
int nNcErr; /* Number of errors encountered while resolving names */
int ncFlags; /* Zero or more NC_* flags defined below */
Select *pWinSelect; /* SELECT statement for any window functions */
};
/*
** Allowed values for the NameContext, ncFlags field.
**
** Value constraints (all checked via assert()):
** NC_HasAgg == SF_HasAgg == EP_Agg
** NC_MinMaxAgg == SF_MinMaxAgg == SQLITE_FUNC_MINMAX
** NC_OrderAgg == SF_OrderByReqd == SQLITE_FUNC_ANYORDER
** NC_HasWin == EP_Win
**
*/
#define NC_AllowAgg 0x000001 /* Aggregate functions are allowed here */
#define NC_PartIdx 0x000002 /* True if resolving a partial index WHERE */
#define NC_IsCheck 0x000004 /* True if resolving a CHECK constraint */
#define NC_GenCol 0x000008 /* True for a GENERATED ALWAYS AS clause */
#define NC_HasAgg 0x000010 /* One or more aggregate functions seen */
#define NC_IdxExpr 0x000020 /* True if resolving columns of CREATE INDEX */
#define NC_SelfRef 0x00002e /* Combo: PartIdx, isCheck, GenCol, and IdxExpr */
#define NC_VarSelect 0x000040 /* A correlated subquery has been seen */
#define NC_UEList 0x000080 /* True if uNC.pEList is used */
#define NC_UAggInfo 0x000100 /* True if uNC.pAggInfo is used */
#define NC_UUpsert 0x000200 /* True if uNC.pUpsert is used */
#define NC_UBaseReg 0x000400 /* True if uNC.iBaseReg is used */
#define NC_MinMaxAgg 0x001000 /* min/max aggregates seen. See note above */
#define NC_Complex 0x002000 /* True if a function or subquery seen */
#define NC_AllowWin 0x004000 /* Window functions are allowed here */
#define NC_HasWin 0x008000 /* One or more window functions seen */
#define NC_IsDDL 0x010000 /* Resolving names in a CREATE statement */
#define NC_InAggFunc 0x020000 /* True if analyzing arguments to an agg func */
#define NC_FromDDL 0x040000 /* SQL text comes from sqlite_schema */
#define NC_NoSelect 0x080000 /* Do not descend into sub-selects */
#define NC_OrderAgg 0x8000000 /* Has an aggregate other than count/min/max */
/*
** An instance of the following object describes a single ON CONFLICT
** clause in an upsert.
**
** The pUpsertTarget field is only set if the ON CONFLICT clause includes
** conflict-target clause. (In "ON CONFLICT(a,b)" the "(a,b)" is the
** conflict-target clause.) The pUpsertTargetWhere is the optional
** WHERE clause used to identify partial unique indexes.
**
** pUpsertSet is the list of column=expr terms of the UPDATE statement.
** The pUpsertSet field is NULL for a ON CONFLICT DO NOTHING. The
** pUpsertWhere is the WHERE clause for the UPDATE and is NULL if the
** WHERE clause is omitted.
*/
struct Upsert {
ExprList *pUpsertTarget; /* Optional description of conflict target */
Expr *pUpsertTargetWhere; /* WHERE clause for partial index targets */
ExprList *pUpsertSet; /* The SET clause from an ON CONFLICT UPDATE */
Expr *pUpsertWhere; /* WHERE clause for the ON CONFLICT UPDATE */
Upsert *pNextUpsert; /* Next ON CONFLICT clause in the list */
u8 isDoUpdate; /* True for DO UPDATE. False for DO NOTHING */
/* Above this point is the parse tree for the ON CONFLICT clauses.
** The next group of fields stores intermediate data. */
void *pToFree; /* Free memory when deleting the Upsert object */
/* All fields above are owned by the Upsert object and must be freed
** when the Upsert is destroyed. The fields below are used to transfer
** information from the INSERT processing down into the UPDATE processing
** while generating code. The fields below are owned by the INSERT
** statement and will be freed by INSERT processing. */
Index *pUpsertIdx; /* UNIQUE constraint specified by pUpsertTarget */
SrcList *pUpsertSrc; /* Table to be updated */
int regData; /* First register holding array of VALUES */
int iDataCur; /* Index of the data cursor */
int iIdxCur; /* Index of the first index cursor */
};
/*
** An instance of the following structure contains all information
** needed to generate code for a single SELECT statement.
**
** See the header comment on the computeLimitRegisters() routine for a
** detailed description of the meaning of the iLimit and iOffset fields.
**
** addrOpenEphm[] entries contain the address of OP_OpenEphemeral opcodes.
** These addresses must be stored so that we can go back and fill in
** the P4_KEYINFO and P2 parameters later. Neither the KeyInfo nor
** the number of columns in P2 can be computed at the same time
** as the OP_OpenEphm instruction is coded because not
** enough information about the compound query is known at that point.
** The KeyInfo for addrOpenTran[0] and [1] contains collating sequences
** for the result set. The KeyInfo for addrOpenEphm[2] contains collating
** sequences for the ORDER BY clause.
*/
struct Select {
u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
LogEst nSelectRow; /* Estimated number of result rows */
u32 selFlags; /* Various SF_* values */
int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */
u32 selId; /* Unique identifier number for this SELECT */
int addrOpenEphm[2]; /* OP_OpenEphem opcodes related to this select */
ExprList *pEList; /* The fields of the result */
SrcList *pSrc; /* The FROM clause */
Expr *pWhere; /* The WHERE clause */
ExprList *pGroupBy; /* The GROUP BY clause */
Expr *pHaving; /* The HAVING clause */
ExprList *pOrderBy; /* The ORDER BY clause */
Select *pPrior; /* Prior select in a compound select statement */
Select *pNext; /* Next select to the left in a compound */
Expr *pLimit; /* LIMIT expression. NULL means not used. */
With *pWith; /* WITH clause attached to this select. Or NULL. */
#ifndef SQLITE_OMIT_WINDOWFUNC
Window *pWin; /* List of window functions */
Window *pWinDefn; /* List of named window definitions */
#endif
};
/*
** Allowed values for Select.selFlags. The "SF" prefix stands for
** "Select Flag".
**
** Value constraints (all checked via assert())
** SF_HasAgg == NC_HasAgg
** SF_MinMaxAgg == NC_MinMaxAgg == SQLITE_FUNC_MINMAX
** SF_OrderByReqd == NC_OrderAgg == SQLITE_FUNC_ANYORDER
** SF_FixedLimit == WHERE_USE_LIMIT
*/
#define SF_Distinct 0x0000001 /* Output should be DISTINCT */
#define SF_All 0x0000002 /* Includes the ALL keyword */
#define SF_Resolved 0x0000004 /* Identifiers have been resolved */
#define SF_Aggregate 0x0000008 /* Contains agg functions or a GROUP BY */
#define SF_HasAgg 0x0000010 /* Contains aggregate functions */
#define SF_UsesEphemeral 0x0000020 /* Uses the OpenEphemeral opcode */
#define SF_Expanded 0x0000040 /* sqlite3SelectExpand() called on this */
#define SF_HasTypeInfo 0x0000080 /* FROM subqueries have Table metadata */
#define SF_Compound 0x0000100 /* Part of a compound query */
#define SF_Values 0x0000200 /* Synthesized from VALUES clause */
#define SF_MultiValue 0x0000400 /* Single VALUES term with multiple rows */
#define SF_NestedFrom 0x0000800 /* Part of a parenthesized FROM clause */
#define SF_MinMaxAgg 0x0001000 /* Aggregate containing min() or max() */
#define SF_Recursive 0x0002000 /* The recursive part of a recursive CTE */
#define SF_FixedLimit 0x0004000 /* nSelectRow set by a constant LIMIT */
#define SF_MaybeConvert 0x0008000 /* Need convertCompoundSelectToSubquery() */
#define SF_Converted 0x0010000 /* By convertCompoundSelectToSubquery() */
#define SF_IncludeHidden 0x0020000 /* Include hidden columns in output */
#define SF_ComplexResult 0x0040000 /* Result contains subquery or function */
#define SF_WhereBegin 0x0080000 /* Really a WhereBegin() call. Debug Only */
#define SF_WinRewrite 0x0100000 /* Window function rewrite accomplished */
#define SF_View 0x0200000 /* SELECT statement is a view */
#define SF_NoopOrderBy 0x0400000 /* ORDER BY is ignored for this query */
#define SF_UFSrcCheck 0x0800000 /* Check pSrc as required by UPDATE...FROM */
#define SF_PushDown 0x1000000 /* SELECT has be modified by push-down opt */
#define SF_MultiPart 0x2000000 /* Has multiple incompatible PARTITIONs */
#define SF_CopyCte 0x4000000 /* SELECT statement is a copy of a CTE */
#define SF_OrderByReqd 0x8000000 /* The ORDER BY clause may not be omitted */
/* True if S exists and has SF_NestedFrom */
#define IsNestedFrom(S) ((S)!=0 && ((S)->selFlags&SF_NestedFrom)!=0)
/*
** The results of a SELECT can be distributed in several ways, as defined
** by one of the following macros. The "SRT" prefix means "SELECT Result
** Type".
**
** SRT_Union Store results as a key in a temporary index
** identified by pDest->iSDParm.
**
** SRT_Except Remove results from the temporary index pDest->iSDParm.
**
** SRT_Exists Store a 1 in memory cell pDest->iSDParm if the result
** set is not empty.
**
** SRT_Discard Throw the results away. This is used by SELECT
** statements within triggers whose only purpose is
** the side-effects of functions.
**
** SRT_Output Generate a row of output (using the OP_ResultRow
** opcode) for each row in the result set.
**
** SRT_Mem Only valid if the result is a single column.
** Store the first column of the first result row
** in register pDest->iSDParm then abandon the rest
** of the query. This destination implies "LIMIT 1".
**
** SRT_Set The result must be a single column. Store each
** row of result as the key in table pDest->iSDParm.
** Apply the affinity pDest->affSdst before storing
** results. Used to implement "IN (SELECT ...)".
**
** SRT_EphemTab Create an temporary table pDest->iSDParm and store
** the result there. The cursor is left open after
** returning. This is like SRT_Table except that
** this destination uses OP_OpenEphemeral to create
** the table first.
**
** SRT_Coroutine Generate a co-routine that returns a new row of
** results each time it is invoked. The entry point
** of the co-routine is stored in register pDest->iSDParm
** and the result row is stored in pDest->nDest registers
** starting with pDest->iSdst.
**
** SRT_Table Store results in temporary table pDest->iSDParm.
** SRT_Fifo This is like SRT_EphemTab except that the table
** is assumed to already be open. SRT_Fifo has
** the additional property of being able to ignore
** the ORDER BY clause.
**
** SRT_DistFifo Store results in a temporary table pDest->iSDParm.
** But also use temporary table pDest->iSDParm+1 as
** a record of all prior results and ignore any duplicate
** rows. Name means: "Distinct Fifo".
**
** SRT_Queue Store results in priority queue pDest->iSDParm (really
** an index). Append a sequence number so that all entries
** are distinct.
**
** SRT_DistQueue Store results in priority queue pDest->iSDParm only if
** the same record has never been stored before. The
** index at pDest->iSDParm+1 hold all prior stores.
**
** SRT_Upfrom Store results in the temporary table already opened by
** pDest->iSDParm. If (pDest->iSDParm<0), then the temp
** table is an intkey table - in this case the first
** column returned by the SELECT is used as the integer
** key. If (pDest->iSDParm>0), then the table is an index
** table. (pDest->iSDParm) is the number of key columns in
** each index record in this case.
*/
#define SRT_Union 1 /* Store result as keys in an index */
#define SRT_Except 2 /* Remove result from a UNION index */
#define SRT_Exists 3 /* Store 1 if the result is not empty */
#define SRT_Discard 4 /* Do not save the results anywhere */
#define SRT_DistFifo 5 /* Like SRT_Fifo, but unique results only */
#define SRT_DistQueue 6 /* Like SRT_Queue, but unique results only */
/* The DISTINCT clause is ignored for all of the above. Not that
** IgnorableDistinct() implies IgnorableOrderby() */
#define IgnorableDistinct(X) ((X->eDest)<=SRT_DistQueue)
#define SRT_Queue 7 /* Store result in an queue */
#define SRT_Fifo 8 /* Store result as data with an automatic rowid */
/* The ORDER BY clause is ignored for all of the above */
#define IgnorableOrderby(X) ((X->eDest)<=SRT_Fifo)
#define SRT_Output 9 /* Output each row of result */
#define SRT_Mem 10 /* Store result in a memory cell */
#define SRT_Set 11 /* Store results as keys in an index */
#define SRT_EphemTab 12 /* Create transient tab and store like SRT_Table */
#define SRT_Coroutine 13 /* Generate a single row of result */
#define SRT_Table 14 /* Store result as data with an automatic rowid */
#define SRT_Upfrom 15 /* Store result as data with rowid */
/*
** An instance of this object describes where to put of the results of
** a SELECT statement.
*/
struct SelectDest {
u8 eDest; /* How to dispose of the results. One of SRT_* above. */
int iSDParm; /* A parameter used by the eDest disposal method */
int iSDParm2; /* A second parameter for the eDest disposal method */
int iSdst; /* Base register where results are written */
int nSdst; /* Number of registers allocated */
char *zAffSdst; /* Affinity used when eDest==SRT_Set */
ExprList *pOrderBy; /* Key columns for SRT_Queue and SRT_DistQueue */
};
/*
** During code generation of statements that do inserts into AUTOINCREMENT
** tables, the following information is attached to the Table.u.autoInc.p
** pointer of each autoincrement table to record some side information that
** the code generator needs. We have to keep per-table autoincrement
** information in case inserts are done within triggers. Triggers do not
** normally coordinate their activities, but we do need to coordinate the
** loading and saving of autoincrement information.
*/
struct AutoincInfo {
AutoincInfo *pNext; /* Next info block in a list of them all */
Table *pTab; /* Table this info block refers to */
int iDb; /* Index in sqlite3.aDb[] of database holding pTab */
int regCtr; /* Memory register holding the rowid counter */
};
/*
** At least one instance of the following structure is created for each
** trigger that may be fired while parsing an INSERT, UPDATE or DELETE
** statement. All such objects are stored in the linked list headed at
** Parse.pTriggerPrg and deleted once statement compilation has been
** completed.
**
** A Vdbe sub-program that implements the body and WHEN clause of trigger
** TriggerPrg.pTrigger, assuming a default ON CONFLICT clause of
** TriggerPrg.orconf, is stored in the TriggerPrg.pProgram variable.
** The Parse.pTriggerPrg list never contains two entries with the same
** values for both pTrigger and orconf.
**
** The TriggerPrg.aColmask[0] variable is set to a mask of old.* columns
** accessed (or set to 0 for triggers fired as a result of INSERT
** statements). Similarly, the TriggerPrg.aColmask[1] variable is set to
** a mask of new.* columns used by the program.
*/
struct TriggerPrg {
Trigger *pTrigger; /* Trigger this program was coded from */
TriggerPrg *pNext; /* Next entry in Parse.pTriggerPrg list */
SubProgram *pProgram; /* Program implementing pTrigger/orconf */
int orconf; /* Default ON CONFLICT policy */
u32 aColmask[2]; /* Masks of old.*, new.* columns accessed */
};
/*
** The yDbMask datatype for the bitmask of all attached databases.
*/
#if SQLITE_MAX_ATTACHED>30
typedef unsigned char yDbMask[(SQLITE_MAX_ATTACHED+9)/8];
# define DbMaskTest(M,I) (((M)[(I)/8]&(1<<((I)&7)))!=0)
# define DbMaskZero(M) memset((M),0,sizeof(M))
# define DbMaskSet(M,I) (M)[(I)/8]|=(1<<((I)&7))
# define DbMaskAllZero(M) sqlite3DbMaskAllZero(M)
# define DbMaskNonZero(M) (sqlite3DbMaskAllZero(M)==0)
#else
typedef unsigned int yDbMask;
# define DbMaskTest(M,I) (((M)&(((yDbMask)1)<<(I)))!=0)
# define DbMaskZero(M) (M)=0
# define DbMaskSet(M,I) (M)|=(((yDbMask)1)<<(I))
# define DbMaskAllZero(M) (M)==0
# define DbMaskNonZero(M) (M)!=0
#endif
/*
** An instance of the ParseCleanup object specifies an operation that
** should be performed after parsing to deallocation resources obtained
** during the parse and which are no longer needed.
*/
struct ParseCleanup {
ParseCleanup *pNext; /* Next cleanup task */
void *pPtr; /* Pointer to object to deallocate */
void (*xCleanup)(sqlite3*,void*); /* Deallocation routine */
};
/*
** An SQL parser context. A copy of this structure is passed through
** the parser and down into all the parser action routine in order to
** carry around information that is global to the entire parse.
**
** The structure is divided into two parts. When the parser and code
** generate call themselves recursively, the first part of the structure
** is constant but the second part is reset at the beginning and end of
** each recursion.
**
** The nTableLock and aTableLock variables are only used if the shared-cache
** feature is enabled (if sqlite3Tsd()->useSharedData is true). They are
** used to store the set of table-locks required by the statement being
** compiled. Function sqlite3TableLock() is used to add entries to the
** list.
*/
struct Parse {
sqlite3 *db; /* The main database structure */
char *zErrMsg; /* An error message */
Vdbe *pVdbe; /* An engine for executing database bytecode */
int rc; /* Return code from execution */
u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
u8 checkSchema; /* Causes schema cookie check after an error */
u8 nested; /* Number of nested calls to the parser/code generator */
u8 nTempReg; /* Number of temporary registers in aTempReg[] */
u8 isMultiWrite; /* True if statement may modify/insert multiple rows */
u8 mayAbort; /* True if statement may throw an ABORT exception */
u8 hasCompound; /* Need to invoke convertCompoundSelectToSubquery() */
u8 okConstFactor; /* OK to factor out constants */
u8 disableLookaside; /* Number of times lookaside has been disabled */
u8 disableVtab; /* Disable all virtual tables for this parse */
u8 withinRJSubrtn; /* Nesting level for RIGHT JOIN body subroutines */
#if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST)
u8 earlyCleanup; /* OOM inside sqlite3ParserAddCleanup() */
#endif
int nRangeReg; /* Size of the temporary register block */
int iRangeReg; /* First register in temporary register block */
int nErr; /* Number of errors seen */
int nTab; /* Number of previously allocated VDBE cursors */
int nMem; /* Number of memory cells used so far */
int szOpAlloc; /* Bytes of memory space allocated for Vdbe.aOp[] */
int iSelfTab; /* Table associated with an index on expr, or negative
** of the base register during check-constraint eval */
int nLabel; /* The *negative* of the number of labels used */
int nLabelAlloc; /* Number of slots in aLabel */
int *aLabel; /* Space to hold the labels */
ExprList *pConstExpr;/* Constant expressions */
Token constraintName;/* Name of the constraint currently being parsed */
yDbMask writeMask; /* Start a write transaction on these databases */
yDbMask cookieMask; /* Bitmask of schema verified databases */
int regRowid; /* Register holding rowid of CREATE TABLE entry */
int regRoot; /* Register holding root page number for new objects */
int nMaxArg; /* Max args passed to user function by sub-program */
int nSelect; /* Number of SELECT stmts. Counter for Select.selId */
#ifndef SQLITE_OMIT_SHARED_CACHE
int nTableLock; /* Number of locks in aTableLock */
TableLock *aTableLock; /* Required table locks for shared-cache mode */
#endif
AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */
Parse *pToplevel; /* Parse structure for main program (or NULL) */
Table *pTriggerTab; /* Table triggers are being coded for */
TriggerPrg *pTriggerPrg; /* Linked list of coded triggers */
ParseCleanup *pCleanup; /* List of cleanup operations to run after parse */
union {
int addrCrTab; /* Address of OP_CreateBtree on CREATE TABLE */
Returning *pReturning; /* The RETURNING clause */
} u1;
u32 nQueryLoop; /* Est number of iterations of a query (10*log2(N)) */
u32 oldmask; /* Mask of old.* columns referenced */
u32 newmask; /* Mask of new.* columns referenced */
u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */
u8 bReturning; /* Coding a RETURNING trigger */
u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */
u8 disableTriggers; /* True to disable triggers */
/**************************************************************************
** Fields above must be initialized to zero. The fields that follow,
** down to the beginning of the recursive section, do not need to be
** initialized as they will be set before being used. The boundary is
** determined by offsetof(Parse,aTempReg).
**************************************************************************/
int aTempReg[8]; /* Holding area for temporary registers */
Parse *pOuterParse; /* Outer Parse object when nested */
Token sNameToken; /* Token with unqualified schema object name */
/************************************************************************
** Above is constant between recursions. Below is reset before and after
** each recursion. The boundary between these two regions is determined
** using offsetof(Parse,sLastToken) so the sLastToken field must be the
** first field in the recursive region.
************************************************************************/
Token sLastToken; /* The last token parsed */
ynVar nVar; /* Number of '?' variables seen in the SQL so far */
u8 iPkSortOrder; /* ASC or DESC for INTEGER PRIMARY KEY */
u8 explain; /* True if the EXPLAIN flag is found on the query */
u8 eParseMode; /* PARSE_MODE_XXX constant */
#ifndef SQLITE_OMIT_VIRTUALTABLE
int nVtabLock; /* Number of virtual tables to lock */
#endif
int nHeight; /* Expression tree height of current sub-select */
#ifndef SQLITE_OMIT_EXPLAIN
int addrExplain; /* Address of current OP_Explain opcode */
#endif
VList *pVList; /* Mapping between variable names and numbers */
Vdbe *pReprepare; /* VM being reprepared (sqlite3Reprepare()) */
const char *zTail; /* All SQL text past the last semicolon parsed */
Table *pNewTable; /* A table being constructed by CREATE TABLE */
Index *pNewIndex; /* An index being constructed by CREATE INDEX.
** Also used to hold redundant UNIQUE constraints
** during a RENAME COLUMN */
Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
#ifndef SQLITE_OMIT_VIRTUALTABLE
Token sArg; /* Complete text of a module argument */
Table **apVtabLock; /* Pointer to virtual tables needing locking */
#endif
With *pWith; /* Current WITH clause, or NULL */
#ifndef SQLITE_OMIT_ALTERTABLE
RenameToken *pRename; /* Tokens subject to renaming by ALTER TABLE */
#endif
};
/* Allowed values for Parse.eParseMode
*/
#define PARSE_MODE_NORMAL 0
#define PARSE_MODE_DECLARE_VTAB 1
#define PARSE_MODE_RENAME 2
#define PARSE_MODE_UNMAP 3
/*
** Sizes and pointers of various parts of the Parse object.
*/
#define PARSE_HDR(X) (((char*)(X))+offsetof(Parse,zErrMsg))
#define PARSE_HDR_SZ (offsetof(Parse,aTempReg)-offsetof(Parse,zErrMsg)) /* Recursive part w/o aColCache*/
#define PARSE_RECURSE_SZ offsetof(Parse,sLastToken) /* Recursive part */
#define PARSE_TAIL_SZ (sizeof(Parse)-PARSE_RECURSE_SZ) /* Non-recursive part */
#define PARSE_TAIL(X) (((char*)(X))+PARSE_RECURSE_SZ) /* Pointer to tail */
/*
** Return true if currently inside an sqlite3_declare_vtab() call.
*/
#ifdef SQLITE_OMIT_VIRTUALTABLE
#define IN_DECLARE_VTAB 0
#else
#define IN_DECLARE_VTAB (pParse->eParseMode==PARSE_MODE_DECLARE_VTAB)
#endif
#if defined(SQLITE_OMIT_ALTERTABLE)
#define IN_RENAME_OBJECT 0
#else
#define IN_RENAME_OBJECT (pParse->eParseMode>=PARSE_MODE_RENAME)
#endif
#if defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_OMIT_ALTERTABLE)
#define IN_SPECIAL_PARSE 0
#else
#define IN_SPECIAL_PARSE (pParse->eParseMode!=PARSE_MODE_NORMAL)
#endif
/*
** An instance of the following structure can be declared on a stack and used
** to save the Parse.zAuthContext value so that it can be restored later.
*/
struct AuthContext {
const char *zAuthContext; /* Put saved Parse.zAuthContext here */
Parse *pParse; /* The Parse structure */
};
/*
** Bitfield flags for P5 value in various opcodes.
**
** Value constraints (enforced via assert()):
** OPFLAG_LENGTHARG == SQLITE_FUNC_LENGTH
** OPFLAG_TYPEOFARG == SQLITE_FUNC_TYPEOF
** OPFLAG_BULKCSR == BTREE_BULKLOAD
** OPFLAG_SEEKEQ == BTREE_SEEK_EQ
** OPFLAG_FORDELETE == BTREE_FORDELETE
** OPFLAG_SAVEPOSITION == BTREE_SAVEPOSITION
** OPFLAG_AUXDELETE == BTREE_AUXDELETE
*/
#define OPFLAG_NCHANGE 0x01 /* OP_Insert: Set to update db->nChange */
/* Also used in P2 (not P5) of OP_Delete */
#define OPFLAG_NOCHNG 0x01 /* OP_VColumn nochange for UPDATE */
#define OPFLAG_EPHEM 0x01 /* OP_Column: Ephemeral output is ok */
#define OPFLAG_LASTROWID 0x20 /* Set to update db->lastRowid */
#define OPFLAG_ISUPDATE 0x04 /* This OP_Insert is an sql UPDATE */
#define OPFLAG_APPEND 0x08 /* This is likely to be an append */
#define OPFLAG_USESEEKRESULT 0x10 /* Try to avoid a seek in BtreeInsert() */
#define OPFLAG_ISNOOP 0x40 /* OP_Delete does pre-update-hook only */
#define OPFLAG_LENGTHARG 0x40 /* OP_Column only used for length() */
#define OPFLAG_TYPEOFARG 0x80 /* OP_Column only used for typeof() */
#define OPFLAG_BULKCSR 0x01 /* OP_Open** used to open bulk cursor */
#define OPFLAG_SEEKEQ 0x02 /* OP_Open** cursor uses EQ seek only */
#define OPFLAG_FORDELETE 0x08 /* OP_Open should use BTREE_FORDELETE */
#define OPFLAG_P2ISREG 0x10 /* P2 to OP_Open** is a register number */
#define OPFLAG_PERMUTE 0x01 /* OP_Compare: use the permutation */
#define OPFLAG_SAVEPOSITION 0x02 /* OP_Delete/Insert: save cursor pos */
#define OPFLAG_AUXDELETE 0x04 /* OP_Delete: index in a DELETE op */
#define OPFLAG_NOCHNG_MAGIC 0x6d /* OP_MakeRecord: serialtype 10 is ok */
#define OPFLAG_PREFORMAT 0x80 /* OP_Insert uses preformatted cell */
/*
** Each trigger present in the database schema is stored as an instance of
** struct Trigger.
**
** Pointers to instances of struct Trigger are stored in two ways.
** 1. In the "trigHash" hash table (part of the sqlite3* that represents the
** database). This allows Trigger structures to be retrieved by name.
** 2. All triggers associated with a single table form a linked list, using the
** pNext member of struct Trigger. A pointer to the first element of the
** linked list is stored as the "pTrigger" member of the associated
** struct Table.
**
** The "step_list" member points to the first element of a linked list
** containing the SQL statements specified as the trigger program.
*/
struct Trigger {
char *zName; /* The name of the trigger */
char *table; /* The table or view to which the trigger applies */
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
u8 bReturning; /* This trigger implements a RETURNING clause */
Expr *pWhen; /* The WHEN clause of the expression (may be NULL) */
IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
the <column-list> is stored here */
Schema *pSchema; /* Schema containing the trigger */
Schema *pTabSchema; /* Schema containing the table */
TriggerStep *step_list; /* Link list of trigger program steps */
Trigger *pNext; /* Next trigger associated with the table */
};
/*
** A trigger is either a BEFORE or an AFTER trigger. The following constants
** determine which.
**
** If there are multiple triggers, you might of some BEFORE and some AFTER.
** In that cases, the constants below can be ORed together.
*/
#define TRIGGER_BEFORE 1
#define TRIGGER_AFTER 2
/*
** An instance of struct TriggerStep is used to store a single SQL statement
** that is a part of a trigger-program.
**
** Instances of struct TriggerStep are stored in a singly linked list (linked
** using the "pNext" member) referenced by the "step_list" member of the
** associated struct Trigger instance. The first element of the linked list is
** the first step of the trigger-program.
**
** The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
** "SELECT" statement. The meanings of the other members is determined by the
** value of "op" as follows:
**
** (op == TK_INSERT)
** orconf -> stores the ON CONFLICT algorithm
** pSelect -> The content to be inserted - either a SELECT statement or
** a VALUES clause.
** zTarget -> Dequoted name of the table to insert into.
** pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
** statement, then this stores the column-names to be
** inserted into.
** pUpsert -> The ON CONFLICT clauses for an Upsert
**
** (op == TK_DELETE)
** zTarget -> Dequoted name of the table to delete from.
** pWhere -> The WHERE clause of the DELETE statement if one is specified.
** Otherwise NULL.
**
** (op == TK_UPDATE)
** zTarget -> Dequoted name of the table to update.
** pWhere -> The WHERE clause of the UPDATE statement if one is specified.
** Otherwise NULL.
** pExprList -> A list of the columns to update and the expressions to update
** them to. See sqlite3Update() documentation of "pChanges"
** argument.
**
** (op == TK_SELECT)
** pSelect -> The SELECT statement
**
** (op == TK_RETURNING)
** pExprList -> The list of expressions that follow the RETURNING keyword.
**
*/
struct TriggerStep {
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT,
** or TK_RETURNING */
u8 orconf; /* OE_Rollback etc. */
Trigger *pTrig; /* The trigger that this step is a part of */
Select *pSelect; /* SELECT statement or RHS of INSERT INTO SELECT ... */
char *zTarget; /* Target table for DELETE, UPDATE, INSERT */
SrcList *pFrom; /* FROM clause for UPDATE statement (if any) */
Expr *pWhere; /* The WHERE clause for DELETE or UPDATE steps */
ExprList *pExprList; /* SET clause for UPDATE, or RETURNING clause */
IdList *pIdList; /* Column names for INSERT */
Upsert *pUpsert; /* Upsert clauses on an INSERT */
char *zSpan; /* Original SQL text of this command */
TriggerStep *pNext; /* Next in the link-list */
TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */
};
/*
** Information about a RETURNING clause
*/
struct Returning {
Parse *pParse; /* The parse that includes the RETURNING clause */
ExprList *pReturnEL; /* List of expressions to return */
Trigger retTrig; /* The transient trigger that implements RETURNING */
TriggerStep retTStep; /* The trigger step */
int iRetCur; /* Transient table holding RETURNING results */
int nRetCol; /* Number of in pReturnEL after expansion */
int iRetReg; /* Register array for holding a row of RETURNING */
};
/*
** An objected used to accumulate the text of a string where we
** do not necessarily know how big the string will be in the end.
*/
struct sqlite3_str {
sqlite3 *db; /* Optional database for lookaside. Can be NULL */
char *zText; /* The string collected so far */
u32 nAlloc; /* Amount of space allocated in zText */
u32 mxAlloc; /* Maximum allowed allocation. 0 for no malloc usage */
u32 nChar; /* Length of the string so far */
u8 accError; /* SQLITE_NOMEM or SQLITE_TOOBIG */
u8 printfFlags; /* SQLITE_PRINTF flags below */
};
#define SQLITE_PRINTF_INTERNAL 0x01 /* Internal-use-only converters allowed */
#define SQLITE_PRINTF_SQLFUNC 0x02 /* SQL function arguments to VXPrintf */
#define SQLITE_PRINTF_MALLOCED 0x04 /* True if xText is allocated space */
#define isMalloced(X) (((X)->printfFlags & SQLITE_PRINTF_MALLOCED)!=0)
/*
** A pointer to this structure is used to communicate information
** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback.
*/
typedef struct {
sqlite3 *db; /* The database being initialized */
char **pzErrMsg; /* Error message stored here */
int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */
int rc; /* Result code stored here */
u32 mInitFlags; /* Flags controlling error messages */
u32 nInitRow; /* Number of rows processed */
Pgno mxPage; /* Maximum page number. 0 for no limit. */
} InitData;
/*
** Allowed values for mInitFlags
*/
#define INITFLAG_AlterMask 0x0003 /* Types of ALTER */
#define INITFLAG_AlterRename 0x0001 /* Reparse after a RENAME */
#define INITFLAG_AlterDrop 0x0002 /* Reparse after a DROP COLUMN */
#define INITFLAG_AlterAdd 0x0003 /* Reparse after an ADD COLUMN */
/* Tuning parameters are set using SQLITE_TESTCTRL_TUNE and are controlled
** on debug-builds of the CLI using ".testctrl tune ID VALUE". Tuning
** parameters are for temporary use during development, to help find
** optimial values for parameters in the query planner. The should not
** be used on trunk check-ins. They are a temporary mechanism available
** for transient development builds only.
**
** Tuning parameters are numbered starting with 1.
*/
#define SQLITE_NTUNE 6 /* Should be zero for all trunk check-ins */
#ifdef SQLITE_DEBUG
# define Tuning(X) (sqlite3Config.aTune[(X)-1])
#else
# define Tuning(X) 0
#endif
/*
** Structure containing global configuration data for the SQLite library.
**
** This structure also contains some state information.
*/
struct Sqlite3Config {
int bMemstat; /* True to enable memory status */
u8 bCoreMutex; /* True to enable core mutexing */
u8 bFullMutex; /* True to enable full mutexing */
u8 bOpenUri; /* True to interpret filenames as URIs */
u8 bUseCis; /* Use covering indices for full-scans */
u8 bSmallMalloc; /* Avoid large memory allocations if true */
u8 bExtraSchemaChecks; /* Verify type,name,tbl_name in schema */
int mxStrlen; /* Maximum string length */
int neverCorrupt; /* Database is always well-formed */
int szLookaside; /* Default lookaside buffer size */
int nLookaside; /* Default lookaside buffer count */
int nStmtSpill; /* Stmt-journal spill-to-disk threshold */
sqlite3_mem_methods m; /* Low-level memory allocation interface */
sqlite3_mutex_methods mutex; /* Low-level mutex interface */
sqlite3_pcache_methods2 pcache2; /* Low-level page-cache interface */
void *pHeap; /* Heap storage space */
int nHeap; /* Size of pHeap[] */
int mnReq, mxReq; /* Min and max heap requests sizes */
sqlite3_int64 szMmap; /* mmap() space per open file */
sqlite3_int64 mxMmap; /* Maximum value for szMmap */
void *pPage; /* Page cache memory */
int szPage; /* Size of each page in pPage[] */
int nPage; /* Number of pages in pPage[] */
int mxParserStack; /* maximum depth of the parser stack */
int sharedCacheEnabled; /* true if shared-cache mode enabled */
u32 szPma; /* Maximum Sorter PMA size */
/* The above might be initialized to non-zero. The following need to always
** initially be zero, however. */
int isInit; /* True after initialization has finished */
int inProgress; /* True while initialization in progress */
int isMutexInit; /* True after mutexes are initialized */
int isMallocInit; /* True after malloc is initialized */
int isPCacheInit; /* True after malloc is initialized */
int nRefInitMutex; /* Number of users of pInitMutex */
sqlite3_mutex *pInitMutex; /* Mutex used by sqlite3_initialize() */
void (*xLog)(void*,int,const char*); /* Function for logging */
void *pLogArg; /* First argument to xLog() */
#ifdef SQLITE_ENABLE_SQLLOG
void(*xSqllog)(void*,sqlite3*,const char*, int);
void *pSqllogArg;
#endif
#ifdef SQLITE_VDBE_COVERAGE
/* The following callback (if not NULL) is invoked on every VDBE branch
** operation. Set the callback using SQLITE_TESTCTRL_VDBE_COVERAGE.
*/
void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx); /* Callback */
void *pVdbeBranchArg; /* 1st argument */
#endif
#ifndef SQLITE_OMIT_DESERIALIZE
sqlite3_int64 mxMemdbSize; /* Default max memdb size */
#endif
#ifndef SQLITE_UNTESTABLE
int (*xTestCallback)(int); /* Invoked by sqlite3FaultSim() */
#endif
int bLocaltimeFault; /* True to fail localtime() calls */
int (*xAltLocaltime)(const void*,void*); /* Alternative localtime() routine */
int iOnceResetThreshold; /* When to reset OP_Once counters */
u32 szSorterRef; /* Min size in bytes to use sorter-refs */
unsigned int iPrngSeed; /* Alternative fixed seed for the PRNG */
/* vvvv--- must be last ---vvv */
#ifdef SQLITE_DEBUG
sqlite3_int64 aTune[SQLITE_NTUNE]; /* Tuning parameters */
#endif
};
/*
** This macro is used inside of assert() statements to indicate that
** the assert is only valid on a well-formed database. Instead of:
**
** assert( X );
**
** One writes:
**
** assert( X || CORRUPT_DB );
**
** CORRUPT_DB is true during normal operation. CORRUPT_DB does not indicate
** that the database is definitely corrupt, only that it might be corrupt.
** For most test cases, CORRUPT_DB is set to false using a special
** sqlite3_test_control(). This enables assert() statements to prove
** things that are always true for well-formed databases.
*/
#define CORRUPT_DB (sqlite3Config.neverCorrupt==0)
/*
** Context pointer passed down through the tree-walk.
*/
struct Walker {
Parse *pParse; /* Parser context. */
int (*xExprCallback)(Walker*, Expr*); /* Callback for expressions */
int (*xSelectCallback)(Walker*,Select*); /* Callback for SELECTs */
void (*xSelectCallback2)(Walker*,Select*);/* Second callback for SELECTs */
int walkerDepth; /* Number of subqueries */
u16 eCode; /* A small processing code */
union { /* Extra data for callback */
NameContext *pNC; /* Naming context */
int n; /* A counter */
int iCur; /* A cursor number */
SrcList *pSrcList; /* FROM clause */
struct CCurHint *pCCurHint; /* Used by codeCursorHint() */
struct RefSrcList *pRefSrcList; /* sqlite3ReferencesSrcList() */
int *aiCol; /* array of column indexes */
struct IdxCover *pIdxCover; /* Check for index coverage */
struct IdxExprTrans *pIdxTrans; /* Convert idxed expr to column */
ExprList *pGroupBy; /* GROUP BY clause */
Select *pSelect; /* HAVING to WHERE clause ctx */
struct WindowRewrite *pRewrite; /* Window rewrite context */
struct WhereConst *pConst; /* WHERE clause constants */
struct RenameCtx *pRename; /* RENAME COLUMN context */
struct Table *pTab; /* Table of generated column */
SrcItem *pSrcItem; /* A single FROM clause item */
DbFixer *pFix;
} u;
};
/*
** The following structure contains information used by the sqliteFix...
** routines as they walk the parse tree to make database references
** explicit.
*/
struct DbFixer {
Parse *pParse; /* The parsing context. Error messages written here */
Walker w; /* Walker object */
Schema *pSchema; /* Fix items to this schema */
u8 bTemp; /* True for TEMP schema entries */
const char *zDb; /* Make sure all objects are contained in this database */
const char *zType; /* Type of the container - used for error messages */
const Token *pName; /* Name of the container - used for error messages */
};
/* Forward declarations */
int sqlite3WalkExpr(Walker*, Expr*);
int sqlite3WalkExprList(Walker*, ExprList*);
int sqlite3WalkSelect(Walker*, Select*);
int sqlite3WalkSelectExpr(Walker*, Select*);
int sqlite3WalkSelectFrom(Walker*, Select*);
int sqlite3ExprWalkNoop(Walker*, Expr*);
int sqlite3SelectWalkNoop(Walker*, Select*);
int sqlite3SelectWalkFail(Walker*, Select*);
int sqlite3WalkerDepthIncrease(Walker*,Select*);
void sqlite3WalkerDepthDecrease(Walker*,Select*);
void sqlite3WalkWinDefnDummyCallback(Walker*,Select*);
#ifdef SQLITE_DEBUG
void sqlite3SelectWalkAssert2(Walker*, Select*);
#endif
#ifndef SQLITE_OMIT_CTE
void sqlite3SelectPopWith(Walker*, Select*);
#else
# define sqlite3SelectPopWith 0
#endif
/*
** Return code from the parse-tree walking primitives and their
** callbacks.
*/
#define WRC_Continue 0 /* Continue down into children */
#define WRC_Prune 1 /* Omit children but continue walking siblings */
#define WRC_Abort 2 /* Abandon the tree walk */
/*
** A single common table expression
*/
struct Cte {
char *zName; /* Name of this CTE */
ExprList *pCols; /* List of explicit column names, or NULL */
Select *pSelect; /* The definition of this CTE */
const char *zCteErr; /* Error message for circular references */
CteUse *pUse; /* Usage information for this CTE */
u8 eM10d; /* The MATERIALIZED flag */
};
/*
** Allowed values for the materialized flag (eM10d):
*/
#define M10d_Yes 0 /* AS MATERIALIZED */
#define M10d_Any 1 /* Not specified. Query planner's choice */
#define M10d_No 2 /* AS NOT MATERIALIZED */
/*
** An instance of the With object represents a WITH clause containing
** one or more CTEs (common table expressions).
*/
struct With {
int nCte; /* Number of CTEs in the WITH clause */
int bView; /* Belongs to the outermost Select of a view */
With *pOuter; /* Containing WITH clause, or NULL */
Cte a[1]; /* For each CTE in the WITH clause.... */
};
/*
** The Cte object is not guaranteed to persist for the entire duration
** of code generation. (The query flattener or other parser tree
** edits might delete it.) The following object records information
** about each Common Table Expression that must be preserved for the
** duration of the parse.
**
** The CteUse objects are freed using sqlite3ParserAddCleanup() rather
** than sqlite3SelectDelete(), which is what enables them to persist
** until the end of code generation.
*/
struct CteUse {
int nUse; /* Number of users of this CTE */
int addrM9e; /* Start of subroutine to compute materialization */
int regRtn; /* Return address register for addrM9e subroutine */
int iCur; /* Ephemeral table holding the materialization */
LogEst nRowEst; /* Estimated number of rows in the table */
u8 eM10d; /* The MATERIALIZED flag */
};
#ifdef SQLITE_DEBUG
/*
** An instance of the TreeView object is used for printing the content of
** data structures on sqlite3DebugPrintf() using a tree-like view.
*/
struct TreeView {
int iLevel; /* Which level of the tree we are on */
u8 bLine[100]; /* Draw vertical in column i if bLine[i] is true */
};
#endif /* SQLITE_DEBUG */
/*
** This object is used in various ways, most (but not all) related to window
** functions.
**
** (1) A single instance of this structure is attached to the
** the Expr.y.pWin field for each window function in an expression tree.
** This object holds the information contained in the OVER clause,
** plus additional fields used during code generation.
**
** (2) All window functions in a single SELECT form a linked-list
** attached to Select.pWin. The Window.pFunc and Window.pExpr
** fields point back to the expression that is the window function.
**
** (3) The terms of the WINDOW clause of a SELECT are instances of this
** object on a linked list attached to Select.pWinDefn.
**
** (4) For an aggregate function with a FILTER clause, an instance
** of this object is stored in Expr.y.pWin with eFrmType set to
** TK_FILTER. In this case the only field used is Window.pFilter.
**
** The uses (1) and (2) are really the same Window object that just happens
** to be accessible in two different ways. Use case (3) are separate objects.
*/
struct Window {
char *zName; /* Name of window (may be NULL) */
char *zBase; /* Name of base window for chaining (may be NULL) */
ExprList *pPartition; /* PARTITION BY clause */
ExprList *pOrderBy; /* ORDER BY clause */
u8 eFrmType; /* TK_RANGE, TK_GROUPS, TK_ROWS, or 0 */
u8 eStart; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */
u8 eEnd; /* UNBOUNDED, CURRENT, PRECEDING or FOLLOWING */
u8 bImplicitFrame; /* True if frame was implicitly specified */
u8 eExclude; /* TK_NO, TK_CURRENT, TK_TIES, TK_GROUP, or 0 */
Expr *pStart; /* Expression for "<expr> PRECEDING" */
Expr *pEnd; /* Expression for "<expr> FOLLOWING" */
Window **ppThis; /* Pointer to this object in Select.pWin list */
Window *pNextWin; /* Next window function belonging to this SELECT */
Expr *pFilter; /* The FILTER expression */
FuncDef *pWFunc; /* The function */
int iEphCsr; /* Partition buffer or Peer buffer */
int regAccum; /* Accumulator */
int regResult; /* Interim result */
int csrApp; /* Function cursor (used by min/max) */
int regApp; /* Function register (also used by min/max) */
int regPart; /* Array of registers for PARTITION BY values */
Expr *pOwner; /* Expression object this window is attached to */
int nBufferCol; /* Number of columns in buffer table */
int iArgCol; /* Offset of first argument for this function */
int regOne; /* Register containing constant value 1 */
int regStartRowid;
int regEndRowid;
u8 bExprArgs; /* Defer evaluation of window function arguments
** due to the SQLITE_SUBTYPE flag */
};
#ifndef SQLITE_OMIT_WINDOWFUNC
void sqlite3WindowDelete(sqlite3*, Window*);
void sqlite3WindowUnlinkFromSelect(Window*);
void sqlite3WindowListDelete(sqlite3 *db, Window *p);
Window *sqlite3WindowAlloc(Parse*, int, int, Expr*, int , Expr*, u8);
void sqlite3WindowAttach(Parse*, Expr*, Window*);
void sqlite3WindowLink(Select *pSel, Window *pWin);
int sqlite3WindowCompare(const Parse*, const Window*, const Window*, int);
void sqlite3WindowCodeInit(Parse*, Select*);
void sqlite3WindowCodeStep(Parse*, Select*, WhereInfo*, int, int);
int sqlite3WindowRewrite(Parse*, Select*);
void sqlite3WindowUpdate(Parse*, Window*, Window*, FuncDef*);
Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p);
Window *sqlite3WindowListDup(sqlite3 *db, Window *p);
void sqlite3WindowFunctions(void);
void sqlite3WindowChain(Parse*, Window*, Window*);
Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*);
#else
# define sqlite3WindowDelete(a,b)
# define sqlite3WindowFunctions()
# define sqlite3WindowAttach(a,b,c)
#endif
/*
** Assuming zIn points to the first byte of a UTF-8 character,
** advance zIn to point to the first byte of the next UTF-8 character.
*/
#define SQLITE_SKIP_UTF8(zIn) { \
if( (*(zIn++))>=0xc0 ){ \
while( (*zIn & 0xc0)==0x80 ){ zIn++; } \
} \
}
/*
** The SQLITE_*_BKPT macros are substitutes for the error codes with
** the same name but without the _BKPT suffix. These macros invoke
** routines that report the line-number on which the error originated
** using sqlite3_log(). The routines also provide a convenient place
** to set a debugger breakpoint.
*/
int sqlite3ReportError(int iErr, int lineno, const char *zType);
int sqlite3CorruptError(int);
int sqlite3MisuseError(int);
int sqlite3CantopenError(int);
#define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__)
#define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__)
#define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__)
#ifdef SQLITE_DEBUG
int sqlite3NomemError(int);
int sqlite3IoerrnomemError(int);
# define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__)
# define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__)
#else
# define SQLITE_NOMEM_BKPT SQLITE_NOMEM
# define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_ENABLE_CORRUPT_PGNO)
int sqlite3CorruptPgnoError(int,Pgno);
# define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptPgnoError(__LINE__,(P))
#else
# define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptError(__LINE__)
#endif
/*
** FTS3 and FTS4 both require virtual table support
*/
#if defined(SQLITE_OMIT_VIRTUALTABLE)
# undef SQLITE_ENABLE_FTS3
# undef SQLITE_ENABLE_FTS4
#endif
/*
** FTS4 is really an extension for FTS3. It is enabled using the
** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also call
** the SQLITE_ENABLE_FTS4 macro to serve as an alias for SQLITE_ENABLE_FTS3.
*/
#if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3)
# define SQLITE_ENABLE_FTS3 1
#endif
/*
** The ctype.h header is needed for non-ASCII systems. It is also
** needed by FTS3 when FTS3 is included in the amalgamation.
*/
#if !defined(SQLITE_ASCII) || \
(defined(SQLITE_ENABLE_FTS3) && defined(SQLITE_AMALGAMATION))
# include <ctype.h>
#endif
/*
** The following macros mimic the standard library functions toupper(),
** isspace(), isalnum(), isdigit() and isxdigit(), respectively. The
** sqlite versions only work for ASCII characters, regardless of locale.
*/
#ifdef SQLITE_ASCII
# define sqlite3Toupper(x) ((x)&~(sqlite3CtypeMap[(unsigned char)(x)]&0x20))
# define sqlite3Isspace(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x01)
# define sqlite3Isalnum(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x06)
# define sqlite3Isalpha(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x02)
# define sqlite3Isdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x04)
# define sqlite3Isxdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x08)
# define sqlite3Tolower(x) (sqlite3UpperToLower[(unsigned char)(x)])
# define sqlite3Isquote(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x80)
#else
# define sqlite3Toupper(x) toupper((unsigned char)(x))
# define sqlite3Isspace(x) isspace((unsigned char)(x))
# define sqlite3Isalnum(x) isalnum((unsigned char)(x))
# define sqlite3Isalpha(x) isalpha((unsigned char)(x))
# define sqlite3Isdigit(x) isdigit((unsigned char)(x))
# define sqlite3Isxdigit(x) isxdigit((unsigned char)(x))
# define sqlite3Tolower(x) tolower((unsigned char)(x))
# define sqlite3Isquote(x) ((x)=='"'||(x)=='\''||(x)=='['||(x)=='`')
#endif
int sqlite3IsIdChar(u8);
/*
** Internal function prototypes
*/
int sqlite3StrICmp(const char*,const char*);
int sqlite3Strlen30(const char*);
#define sqlite3Strlen30NN(C) (strlen(C)&0x3fffffff)
char *sqlite3ColumnType(Column*,char*);
#define sqlite3StrNICmp sqlite3_strnicmp
int sqlite3MallocInit(void);
void sqlite3MallocEnd(void);
void *sqlite3Malloc(u64);
void *sqlite3MallocZero(u64);
void *sqlite3DbMallocZero(sqlite3*, u64);
void *sqlite3DbMallocRaw(sqlite3*, u64);
void *sqlite3DbMallocRawNN(sqlite3*, u64);
char *sqlite3DbStrDup(sqlite3*,const char*);
char *sqlite3DbStrNDup(sqlite3*,const char*, u64);
char *sqlite3DbSpanDup(sqlite3*,const char*,const char*);
void *sqlite3Realloc(void*, u64);
void *sqlite3DbReallocOrFree(sqlite3 *, void *, u64);
void *sqlite3DbRealloc(sqlite3 *, void *, u64);
void sqlite3DbFree(sqlite3*, void*);
void sqlite3DbFreeNN(sqlite3*, void*);
int sqlite3MallocSize(const void*);
int sqlite3DbMallocSize(sqlite3*, const void*);
void *sqlite3PageMalloc(int);
void sqlite3PageFree(void*);
void sqlite3MemSetDefault(void);
#ifndef SQLITE_UNTESTABLE
void sqlite3BenignMallocHooks(void (*)(void), void (*)(void));
#endif
int sqlite3HeapNearlyFull(void);
/*
** On systems with ample stack space and that support alloca(), make
** use of alloca() to obtain space for large automatic objects. By default,
** obtain space from malloc().
**
** The alloca() routine never returns NULL. This will cause code paths
** that deal with sqlite3StackAlloc() failures to be unreachable.
*/
#ifdef SQLITE_USE_ALLOCA
# define sqlite3StackAllocRaw(D,N) alloca(N)
# define sqlite3StackAllocZero(D,N) memset(alloca(N), 0, N)
# define sqlite3StackFree(D,P)
#else
# define sqlite3StackAllocRaw(D,N) sqlite3DbMallocRaw(D,N)
# define sqlite3StackAllocZero(D,N) sqlite3DbMallocZero(D,N)
# define sqlite3StackFree(D,P) sqlite3DbFree(D,P)
#endif
/* Do not allow both MEMSYS5 and MEMSYS3 to be defined together. If they
** are, disable MEMSYS3
*/
#ifdef SQLITE_ENABLE_MEMSYS5
const sqlite3_mem_methods *sqlite3MemGetMemsys5(void);
#undef SQLITE_ENABLE_MEMSYS3
#endif
#ifdef SQLITE_ENABLE_MEMSYS3
const sqlite3_mem_methods *sqlite3MemGetMemsys3(void);
#endif
#ifndef SQLITE_MUTEX_OMIT
sqlite3_mutex_methods const *sqlite3DefaultMutex(void);
sqlite3_mutex_methods const *sqlite3NoopMutex(void);
sqlite3_mutex *sqlite3MutexAlloc(int);
int sqlite3MutexInit(void);
int sqlite3MutexEnd(void);
#endif
#if !defined(SQLITE_MUTEX_OMIT) && !defined(SQLITE_MUTEX_NOOP)
void sqlite3MemoryBarrier(void);
#else
# define sqlite3MemoryBarrier()
#endif
sqlite3_int64 sqlite3StatusValue(int);
void sqlite3StatusUp(int, int);
void sqlite3StatusDown(int, int);
void sqlite3StatusHighwater(int, int);
int sqlite3LookasideUsed(sqlite3*,int*);
/* Access to mutexes used by sqlite3_status() */
sqlite3_mutex *sqlite3Pcache1Mutex(void);
sqlite3_mutex *sqlite3MallocMutex(void);
#if defined(SQLITE_ENABLE_MULTITHREADED_CHECKS) && !defined(SQLITE_MUTEX_OMIT)
void sqlite3MutexWarnOnContention(sqlite3_mutex*);
#else
# define sqlite3MutexWarnOnContention(x)
#endif
#ifndef SQLITE_OMIT_FLOATING_POINT
# define EXP754 (((u64)0x7ff)<<52)
# define MAN754 ((((u64)1)<<52)-1)
# define IsNaN(X) (((X)&EXP754)==EXP754 && ((X)&MAN754)!=0)
int sqlite3IsNaN(double);
#else
# define IsNaN(X) 0
# define sqlite3IsNaN(X) 0
#endif
/*
** An instance of the following structure holds information about SQL
** functions arguments that are the parameters to the printf() function.
*/
struct PrintfArguments {
int nArg; /* Total number of arguments */
int nUsed; /* Number of arguments used so far */
sqlite3_value **apArg; /* The argument values */
};
char *sqlite3MPrintf(sqlite3*,const char*, ...);
char *sqlite3VMPrintf(sqlite3*,const char*, va_list);
#if defined(SQLITE_DEBUG) || defined(SQLITE_HAVE_OS_TRACE)
void sqlite3DebugPrintf(const char*, ...);
#endif
#if defined(SQLITE_TEST)
void *sqlite3TestTextToPtr(const char*);
#endif
#if defined(SQLITE_DEBUG)
void sqlite3TreeViewLine(TreeView*, const char *zFormat, ...);
void sqlite3TreeViewExpr(TreeView*, const Expr*, u8);
void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*);
void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*);
void sqlite3TreeViewBareIdList(TreeView*, const IdList*, const char*);
void sqlite3TreeViewIdList(TreeView*, const IdList*, u8, const char*);
void sqlite3TreeViewColumnList(TreeView*, const Column*, int, u8);
void sqlite3TreeViewSrcList(TreeView*, const SrcList*);
void sqlite3TreeViewSelect(TreeView*, const Select*, u8);
void sqlite3TreeViewWith(TreeView*, const With*, u8);
void sqlite3TreeViewUpsert(TreeView*, const Upsert*, u8);
#if TREETRACE_ENABLED
void sqlite3TreeViewDelete(const With*, const SrcList*, const Expr*,
const ExprList*,const Expr*, const Trigger*);
void sqlite3TreeViewInsert(const With*, const SrcList*,
const IdList*, const Select*, const ExprList*,
int, const Upsert*, const Trigger*);
void sqlite3TreeViewUpdate(const With*, const SrcList*, const ExprList*,
const Expr*, int, const ExprList*, const Expr*,
const Upsert*, const Trigger*);
#endif
#ifndef SQLITE_OMIT_TRIGGER
void sqlite3TreeViewTriggerStep(TreeView*, const TriggerStep*, u8, u8);
void sqlite3TreeViewTrigger(TreeView*, const Trigger*, u8, u8);
#endif
#ifndef SQLITE_OMIT_WINDOWFUNC
void sqlite3TreeViewWindow(TreeView*, const Window*, u8);
void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8);
#endif
void sqlite3ShowExpr(const Expr*);
void sqlite3ShowExprList(const ExprList*);
void sqlite3ShowIdList(const IdList*);
void sqlite3ShowSrcList(const SrcList*);
void sqlite3ShowSelect(const Select*);
void sqlite3ShowWith(const With*);
void sqlite3ShowUpsert(const Upsert*);
#ifndef SQLITE_OMIT_TRIGGER
void sqlite3ShowTriggerStep(const TriggerStep*);
void sqlite3ShowTriggerStepList(const TriggerStep*);
void sqlite3ShowTrigger(const Trigger*);
void sqlite3ShowTriggerList(const Trigger*);
#endif
#ifndef SQLITE_OMIT_WINDOWFUNC
void sqlite3ShowWindow(const Window*);
void sqlite3ShowWinFunc(const Window*);
#endif
#endif
void sqlite3SetString(char **, sqlite3*, const char*);
void sqlite3ErrorMsg(Parse*, const char*, ...);
int sqlite3ErrorToParser(sqlite3*,int);
void sqlite3Dequote(char*);
void sqlite3DequoteExpr(Expr*);
void sqlite3DequoteToken(Token*);
void sqlite3TokenInit(Token*,char*);
int sqlite3KeywordCode(const unsigned char*, int);
int sqlite3RunParser(Parse*, const char*);
void sqlite3FinishCoding(Parse*);
int sqlite3GetTempReg(Parse*);
void sqlite3ReleaseTempReg(Parse*,int);
int sqlite3GetTempRange(Parse*,int);
void sqlite3ReleaseTempRange(Parse*,int,int);
void sqlite3ClearTempRegCache(Parse*);
#ifdef SQLITE_DEBUG
int sqlite3NoTempsInRange(Parse*,int,int);
#endif
Expr *sqlite3ExprAlloc(sqlite3*,int,const Token*,int);
Expr *sqlite3Expr(sqlite3*,int,const char*);
void sqlite3ExprAttachSubtrees(sqlite3*,Expr*,Expr*,Expr*);
Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*);
void sqlite3PExprAddSelect(Parse*, Expr*, Select*);
Expr *sqlite3ExprAnd(Parse*,Expr*, Expr*);
Expr *sqlite3ExprSimplifiedAndOr(Expr*);
Expr *sqlite3ExprFunction(Parse*,ExprList*, const Token*, int);
void sqlite3ExprFunctionUsable(Parse*,const Expr*,const FuncDef*);
void sqlite3ExprAssignVarNumber(Parse*, Expr*, u32);
void sqlite3ExprDelete(sqlite3*, Expr*);
void sqlite3ExprDeferredDelete(Parse*, Expr*);
void sqlite3ExprUnmapAndDelete(Parse*, Expr*);
ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*);
ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*);
Select *sqlite3ExprListToValues(Parse*, int, ExprList*);
void sqlite3ExprListSetSortOrder(ExprList*,int,int);
void sqlite3ExprListSetName(Parse*,ExprList*,const Token*,int);
void sqlite3ExprListSetSpan(Parse*,ExprList*,const char*,const char*);
void sqlite3ExprListDelete(sqlite3*, ExprList*);
u32 sqlite3ExprListFlags(const ExprList*);
int sqlite3IndexHasDuplicateRootPage(Index*);
int sqlite3Init(sqlite3*, char**);
int sqlite3InitCallback(void*, int, char**, char**);
int sqlite3InitOne(sqlite3*, int, char**, u32);
void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
#ifndef SQLITE_OMIT_VIRTUALTABLE
Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName);
#endif
void sqlite3ResetAllSchemasOfConnection(sqlite3*);
void sqlite3ResetOneSchema(sqlite3*,int);
void sqlite3CollapseDatabaseArray(sqlite3*);
void sqlite3CommitInternalChanges(sqlite3*);
void sqlite3ColumnSetExpr(Parse*,Table*,Column*,Expr*);
Expr *sqlite3ColumnExpr(Table*,Column*);
void sqlite3ColumnSetColl(sqlite3*,Column*,const char*zColl);
const char *sqlite3ColumnColl(Column*);
void sqlite3DeleteColumnNames(sqlite3*,Table*);
void sqlite3GenerateColumnNames(Parse *pParse, Select *pSelect);
int sqlite3ColumnsFromExprList(Parse*,ExprList*,i16*,Column**);
void sqlite3SelectAddColumnTypeAndCollation(Parse*,Table*,Select*,char);
Table *sqlite3ResultSetOfSelect(Parse*,Select*,char);
void sqlite3OpenSchemaTable(Parse *, int);
Index *sqlite3PrimaryKeyIndex(Table*);
i16 sqlite3TableColumnToIndex(Index*, i16);
#ifdef SQLITE_OMIT_GENERATED_COLUMNS
# define sqlite3TableColumnToStorage(T,X) (X) /* No-op pass-through */
# define sqlite3StorageColumnToTable(T,X) (X) /* No-op pass-through */
#else
i16 sqlite3TableColumnToStorage(Table*, i16);
i16 sqlite3StorageColumnToTable(Table*, i16);
#endif
void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
#if SQLITE_ENABLE_HIDDEN_COLUMNS
void sqlite3ColumnPropertiesFromName(Table*, Column*);
#else
# define sqlite3ColumnPropertiesFromName(T,C) /* no-op */
#endif
void sqlite3AddColumn(Parse*,Token,Token);
void sqlite3AddNotNull(Parse*, int);
void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
void sqlite3AddCheckConstraint(Parse*, Expr*, const char*, const char*);
void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*);
void sqlite3AddCollateType(Parse*, Token*);
void sqlite3AddGenerated(Parse*,Expr*,Token*);
void sqlite3EndTable(Parse*,Token*,Token*,u32,Select*);
void sqlite3AddReturning(Parse*,ExprList*);
int sqlite3ParseUri(const char*,const char*,unsigned int*,
sqlite3_vfs**,char**,char **);
#define sqlite3CodecQueryParameters(A,B,C) 0
Btree *sqlite3DbNameToBtree(sqlite3*,const char*);
#ifdef SQLITE_UNTESTABLE
# define sqlite3FaultSim(X) SQLITE_OK
#else
int sqlite3FaultSim(int);
#endif
Bitvec *sqlite3BitvecCreate(u32);
int sqlite3BitvecTest(Bitvec*, u32);
int sqlite3BitvecTestNotNull(Bitvec*, u32);
int sqlite3BitvecSet(Bitvec*, u32);
void sqlite3BitvecClear(Bitvec*, u32, void*);
void sqlite3BitvecDestroy(Bitvec*);
u32 sqlite3BitvecSize(Bitvec*);
#ifndef SQLITE_UNTESTABLE
int sqlite3BitvecBuiltinTest(int,int*);
#endif
RowSet *sqlite3RowSetInit(sqlite3*);
void sqlite3RowSetDelete(void*);
void sqlite3RowSetClear(void*);
void sqlite3RowSetInsert(RowSet*, i64);
int sqlite3RowSetTest(RowSet*, int iBatch, i64);
int sqlite3RowSetNext(RowSet*, i64*);
void sqlite3CreateView(Parse*,Token*,Token*,Token*,ExprList*,Select*,int,int);
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
# define sqlite3ViewGetColumnNames(A,B) 0
#endif
#if SQLITE_MAX_ATTACHED>30
int sqlite3DbMaskAllZero(yDbMask);
#endif
void sqlite3DropTable(Parse*, SrcList*, int, int);
void sqlite3CodeDropTable(Parse*, Table*, int, int);
void sqlite3DeleteTable(sqlite3*, Table*);
void sqlite3FreeIndex(sqlite3*, Index*);
#ifndef SQLITE_OMIT_AUTOINCREMENT
void sqlite3AutoincrementBegin(Parse *pParse);
void sqlite3AutoincrementEnd(Parse *pParse);
#else
# define sqlite3AutoincrementBegin(X)
# define sqlite3AutoincrementEnd(X)
#endif
void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
void sqlite3ComputeGeneratedColumns(Parse*, int, Table*);
#endif
void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*);
IdList *sqlite3IdListAppend(Parse*, IdList*, Token*);
int sqlite3IdListIndex(IdList*,const char*);
SrcList *sqlite3SrcListEnlarge(Parse*, SrcList*, int, int);
SrcList *sqlite3SrcListAppendList(Parse *pParse, SrcList *p1, SrcList *p2);
SrcList *sqlite3SrcListAppend(Parse*, SrcList*, Token*, Token*);
SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*,
Token*, Select*, OnOrUsing*);
void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *);
void sqlite3SrcListFuncArgs(Parse*, SrcList*, ExprList*);
int sqlite3IndexedByLookup(Parse *, SrcItem *);
void sqlite3SrcListShiftJoinType(Parse*,SrcList*);
void sqlite3SrcListAssignCursors(Parse*, SrcList*);
void sqlite3IdListDelete(sqlite3*, IdList*);
void sqlite3ClearOnOrUsing(sqlite3*, OnOrUsing*);
void sqlite3SrcListDelete(sqlite3*, SrcList*);
Index *sqlite3AllocateIndexObject(sqlite3*,i16,int,char**);
void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
Expr*, int, int, u8);
void sqlite3DropIndex(Parse*, SrcList*, int);
int sqlite3Select(Parse*, Select*, SelectDest*);
Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*,
Expr*,ExprList*,u32,Expr*);
void sqlite3SelectDelete(sqlite3*, Select*);
Table *sqlite3SrcListLookup(Parse*, SrcList*);
int sqlite3IsReadOnly(Parse*, Table*, int);
void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY)
Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,char*);
#endif
void sqlite3CodeChangeCount(Vdbe*,int,const char*);
void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*);
void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*,
Upsert*);
WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,
ExprList*,Select*,u16,int);
void sqlite3WhereEnd(WhereInfo*);
LogEst sqlite3WhereOutputRowCount(WhereInfo*);
int sqlite3WhereIsDistinct(WhereInfo*);
int sqlite3WhereIsOrdered(WhereInfo*);
int sqlite3WhereOrderByLimitOptLabel(WhereInfo*);
void sqlite3WhereMinMaxOptEarlyOut(Vdbe*,WhereInfo*);
int sqlite3WhereIsSorted(WhereInfo*);
int sqlite3WhereContinueLabel(WhereInfo*);
int sqlite3WhereBreakLabel(WhereInfo*);
int sqlite3WhereOkOnePass(WhereInfo*, int*);
#define ONEPASS_OFF 0 /* Use of ONEPASS not allowed */
#define ONEPASS_SINGLE 1 /* ONEPASS valid for a single row update */
#define ONEPASS_MULTI 2 /* ONEPASS is valid for multiple rows */
int sqlite3WhereUsesDeferredSeek(WhereInfo*);
void sqlite3ExprCodeLoadIndexColumn(Parse*, Index*, int, int, int);
int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8);
void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);
void sqlite3ExprCodeMove(Parse*, int, int, int);
void sqlite3ExprCode(Parse*, Expr*, int);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
void sqlite3ExprCodeGeneratedColumn(Parse*, Table*, Column*, int);
#endif
void sqlite3ExprCodeCopy(Parse*, Expr*, int);
void sqlite3ExprCodeFactorable(Parse*, Expr*, int);
int sqlite3ExprCodeRunJustOnce(Parse*, Expr*, int);
int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
int sqlite3ExprCodeTarget(Parse*, Expr*, int);
int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int, u8);
#define SQLITE_ECEL_DUP 0x01 /* Deep, not shallow copies */
#define SQLITE_ECEL_FACTOR 0x02 /* Factor out constant terms */
#define SQLITE_ECEL_REF 0x04 /* Use ExprList.u.x.iOrderByCol */
#define SQLITE_ECEL_OMITREF 0x08 /* Omit if ExprList.u.x.iOrderByCol */
void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
void sqlite3ExprIfFalseDup(Parse*, Expr*, int, int);
Table *sqlite3FindTable(sqlite3*,const char*, const char*);
#define LOCATE_VIEW 0x01
#define LOCATE_NOERR 0x02
Table *sqlite3LocateTable(Parse*,u32 flags,const char*, const char*);
const char *sqlite3PreferredTableName(const char*);
Table *sqlite3LocateTableItem(Parse*,u32 flags,SrcItem *);
Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
void sqlite3Vacuum(Parse*,Token*,Expr*);
int sqlite3RunVacuum(char**, sqlite3*, int, sqlite3_value*);
char *sqlite3NameFromToken(sqlite3*, const Token*);
int sqlite3ExprCompare(const Parse*,const Expr*,const Expr*, int);
int sqlite3ExprCompareSkip(Expr*,Expr*,int);
int sqlite3ExprListCompare(const ExprList*,const ExprList*, int);
int sqlite3ExprImpliesExpr(const Parse*,const Expr*,const Expr*, int);
int sqlite3ExprImpliesNonNullRow(Expr*,int);
void sqlite3AggInfoPersistWalkerInit(Walker*,Parse*);
void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
int sqlite3ExprCoveredByIndex(Expr*, int iCur, Index *pIdx);
int sqlite3ReferencesSrcList(Parse*, Expr*, SrcList*);
Vdbe *sqlite3GetVdbe(Parse*);
#ifndef SQLITE_UNTESTABLE
void sqlite3PrngSaveState(void);
void sqlite3PrngRestoreState(void);
#endif
void sqlite3RollbackAll(sqlite3*,int);
void sqlite3CodeVerifySchema(Parse*, int);
void sqlite3CodeVerifyNamedSchema(Parse*, const char *zDb);
void sqlite3BeginTransaction(Parse*, int);
void sqlite3EndTransaction(Parse*,int);
void sqlite3Savepoint(Parse*, int, Token*);
void sqlite3CloseSavepoints(sqlite3 *);
void sqlite3LeaveMutexAndCloseZombie(sqlite3*);
u32 sqlite3IsTrueOrFalse(const char*);
int sqlite3ExprIdToTrueFalse(Expr*);
int sqlite3ExprTruthValue(const Expr*);
int sqlite3ExprIsConstant(Expr*);
int sqlite3ExprIsConstantNotJoin(Expr*);
int sqlite3ExprIsConstantOrFunction(Expr*, u8);
int sqlite3ExprIsConstantOrGroupBy(Parse*, Expr*, ExprList*);
int sqlite3ExprIsTableConstant(Expr*,int);
int sqlite3ExprIsTableConstraint(Expr*,const SrcItem*);
#ifdef SQLITE_ENABLE_CURSOR_HINTS
int sqlite3ExprContainsSubquery(Expr*);
#endif
int sqlite3ExprIsInteger(const Expr*, int*);
int sqlite3ExprCanBeNull(const Expr*);
int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(
Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int);
void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);
int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM
void sqlite3SetMakeRecordP5(Vdbe*,Table*);
#else
# define sqlite3SetMakeRecordP5(A,B)
#endif
void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int);
int sqlite3OpenTableAndIndices(Parse*, Table*, int, u8, int, u8*, int*, int*);
void sqlite3BeginWriteOperation(Parse*, int, int);
void sqlite3MultiWrite(Parse*);
void sqlite3MayAbort(Parse*);
void sqlite3HaltConstraint(Parse*, int, int, char*, i8, u8);
void sqlite3UniqueConstraint(Parse*, int, Index*);
void sqlite3RowidConstraint(Parse*, int, Table*);
Expr *sqlite3ExprDup(sqlite3*,const Expr*,int);
ExprList *sqlite3ExprListDup(sqlite3*,const ExprList*,int);
SrcList *sqlite3SrcListDup(sqlite3*,const SrcList*,int);
IdList *sqlite3IdListDup(sqlite3*,const IdList*);
Select *sqlite3SelectDup(sqlite3*,const Select*,int);
FuncDef *sqlite3FunctionSearch(int,const char*);
void sqlite3InsertBuiltinFuncs(FuncDef*,int);
FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,u8,u8);
void sqlite3QuoteValue(StrAccum*,sqlite3_value*);
void sqlite3RegisterBuiltinFunctions(void);
void sqlite3RegisterDateTimeFunctions(void);
void sqlite3RegisterJsonFunctions(void);
void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3*);
#if !defined(SQLITE_OMIT_VIRTUALTABLE) && !defined(SQLITE_OMIT_JSON)
int sqlite3JsonTableFunctions(sqlite3*);
#endif
int sqlite3SafetyCheckOk(sqlite3*);
int sqlite3SafetyCheckSickOrOk(sqlite3*);
void sqlite3ChangeCookie(Parse*, int);
With *sqlite3WithDup(sqlite3 *db, With *p);
#if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER)
void sqlite3MaterializeView(Parse*, Table*, Expr*, ExprList*,Expr*,int);
#endif
#ifndef SQLITE_OMIT_TRIGGER
void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
Expr*,int, int);
void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
void sqlite3DropTrigger(Parse*, SrcList*, int);
void sqlite3DropTriggerPtr(Parse*, Trigger*);
Trigger *sqlite3TriggersExist(Parse *, Table*, int, ExprList*, int *pMask);
Trigger *sqlite3TriggerList(Parse *, Table *);
void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *,
int, int, int);
void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int);
void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*);
TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*,
const char*,const char*);
TriggerStep *sqlite3TriggerInsertStep(Parse*,Token*, IdList*,
Select*,u8,Upsert*,
const char*,const char*);
TriggerStep *sqlite3TriggerUpdateStep(Parse*,Token*,SrcList*,ExprList*,
Expr*, u8, const char*,const char*);
TriggerStep *sqlite3TriggerDeleteStep(Parse*,Token*, Expr*,
const char*,const char*);
void sqlite3DeleteTrigger(sqlite3*, Trigger*);
void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int);
SrcList *sqlite3TriggerStepSrc(Parse*, TriggerStep*);
# define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p))
# define sqlite3IsToplevel(p) ((p)->pToplevel==0)
#else
# define sqlite3TriggersExist(B,C,D,E,F) 0
# define sqlite3DeleteTrigger(A,B)
# define sqlite3DropTriggerPtr(A,B)
# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I)
# define sqlite3CodeRowTriggerDirect(A,B,C,D,E,F)
# define sqlite3TriggerList(X, Y) 0
# define sqlite3ParseToplevel(p) p
# define sqlite3IsToplevel(p) 1
# define sqlite3TriggerColmask(A,B,C,D,E,F,G) 0
# define sqlite3TriggerStepSrc(A,B) 0
#endif
int sqlite3JoinType(Parse*, Token*, Token*, Token*);
int sqlite3ColumnIndex(Table *pTab, const char *zCol);
void sqlite3SrcItemColumnUsed(SrcItem*,int);
void sqlite3SetJoinExpr(Expr*,int,u32);
void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
void sqlite3DeferForeignKey(Parse*, int);
#ifndef SQLITE_OMIT_AUTHORIZATION
void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*);
int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
void sqlite3AuthContextPop(AuthContext*);
int sqlite3AuthReadCol(Parse*, const char *, const char *, int);
#else
# define sqlite3AuthRead(a,b,c,d)
# define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK
# define sqlite3AuthContextPush(a,b,c)
# define sqlite3AuthContextPop(a) ((void)(a))
#endif
int sqlite3DbIsNamed(sqlite3 *db, int iDb, const char *zName);
void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
void sqlite3Detach(Parse*, Expr*);
void sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
int sqlite3FixSrcList(DbFixer*, SrcList*);
int sqlite3FixSelect(DbFixer*, Select*);
int sqlite3FixExpr(DbFixer*, Expr*);
int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
int sqlite3RealSameAsInt(double,sqlite3_int64);
void sqlite3Int64ToText(i64,char*);
int sqlite3AtoF(const char *z, double*, int, u8);
int sqlite3GetInt32(const char *, int*);
int sqlite3GetUInt32(const char*, u32*);
int sqlite3Atoi(const char*);
#ifndef SQLITE_OMIT_UTF16
int sqlite3Utf16ByteLen(const void *pData, int nChar);
#endif
int sqlite3Utf8CharLen(const char *pData, int nByte);
u32 sqlite3Utf8Read(const u8**);
LogEst sqlite3LogEst(u64);
LogEst sqlite3LogEstAdd(LogEst,LogEst);
LogEst sqlite3LogEstFromDouble(double);
u64 sqlite3LogEstToInt(LogEst);
VList *sqlite3VListAdd(sqlite3*,VList*,const char*,int,int);
const char *sqlite3VListNumToName(VList*,int);
int sqlite3VListNameToNum(VList*,const char*,int);
/*
** Routines to read and write variable-length integers. These used to
** be defined locally, but now we use the varint routines in the util.c
** file.
*/
int sqlite3PutVarint(unsigned char*, u64);
u8 sqlite3GetVarint(const unsigned char *, u64 *);
u8 sqlite3GetVarint32(const unsigned char *, u32 *);
int sqlite3VarintLen(u64 v);
/*
** The common case is for a varint to be a single byte. They following
** macros handle the common case without a procedure call, but then call
** the procedure for larger varints.
*/
#define getVarint32(A,B) \
(u8)((*(A)<(u8)0x80)?((B)=(u32)*(A)),1:sqlite3GetVarint32((A),(u32 *)&(B)))
#define getVarint32NR(A,B) \
B=(u32)*(A);if(B>=0x80)sqlite3GetVarint32((A),(u32*)&(B))
#define putVarint32(A,B) \
(u8)(((u32)(B)<(u32)0x80)?(*(A)=(unsigned char)(B)),1:\
sqlite3PutVarint((A),(B)))
#define getVarint sqlite3GetVarint
#define putVarint sqlite3PutVarint
const char *sqlite3IndexAffinityStr(sqlite3*, Index*);
void sqlite3TableAffinity(Vdbe*, Table*, int);
char sqlite3CompareAffinity(const Expr *pExpr, char aff2);
int sqlite3IndexAffinityOk(const Expr *pExpr, char idx_affinity);
char sqlite3TableColumnAffinity(const Table*,int);
char sqlite3ExprAffinity(const Expr *pExpr);
int sqlite3Atoi64(const char*, i64*, int, u8);
int sqlite3DecOrHexToI64(const char*, i64*);
void sqlite3ErrorWithMsg(sqlite3*, int, const char*,...);
void sqlite3Error(sqlite3*,int);
void sqlite3ErrorClear(sqlite3*);
void sqlite3SystemError(sqlite3*,int);
void *sqlite3HexToBlob(sqlite3*, const char *z, int n);
u8 sqlite3HexToInt(int h);
int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
#if defined(SQLITE_NEED_ERR_NAME)
const char *sqlite3ErrName(int);
#endif
#ifndef SQLITE_OMIT_DESERIALIZE
int sqlite3MemdbInit(void);
#endif
const char *sqlite3ErrStr(int);
int sqlite3ReadSchema(Parse *pParse);
CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int);
int sqlite3IsBinary(const CollSeq*);
CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName);
void sqlite3SetTextEncoding(sqlite3 *db, u8);
CollSeq *sqlite3ExprCollSeq(Parse *pParse, const Expr *pExpr);
CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, const Expr *pExpr);
int sqlite3ExprCollSeqMatch(Parse*,const Expr*,const Expr*);
Expr *sqlite3ExprAddCollateToken(const Parse *pParse, Expr*, const Token*, int);
Expr *sqlite3ExprAddCollateString(const Parse*,Expr*,const char*);
Expr *sqlite3ExprSkipCollate(Expr*);
Expr *sqlite3ExprSkipCollateAndLikely(Expr*);
int sqlite3CheckCollSeq(Parse *, CollSeq *);
int sqlite3WritableSchema(sqlite3*);
int sqlite3CheckObjectName(Parse*, const char*,const char*,const char*);
void sqlite3VdbeSetChanges(sqlite3 *, i64);
int sqlite3AddInt64(i64*,i64);
int sqlite3SubInt64(i64*,i64);
int sqlite3MulInt64(i64*,i64);
int sqlite3AbsInt32(int);
#ifdef SQLITE_ENABLE_8_3_NAMES
void sqlite3FileSuffix3(const char*, char*);
#else
# define sqlite3FileSuffix3(X,Y)
#endif
u8 sqlite3GetBoolean(const char *z,u8);
const void *sqlite3ValueText(sqlite3_value*, u8);
int sqlite3ValueBytes(sqlite3_value*, u8);
void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8,
void(*)(void*));
void sqlite3ValueSetNull(sqlite3_value*);
void sqlite3ValueFree(sqlite3_value*);
#ifndef SQLITE_UNTESTABLE
void sqlite3ResultIntReal(sqlite3_context*);
#endif
sqlite3_value *sqlite3ValueNew(sqlite3 *);
#ifndef SQLITE_OMIT_UTF16
char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8);
#endif
int sqlite3ValueFromExpr(sqlite3 *, const Expr *, u8, u8, sqlite3_value **);
void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
extern const unsigned char sqlite3OpcodeProperty[];
extern const char sqlite3StrBINARY[];
extern const unsigned char sqlite3StdTypeLen[];
extern const char sqlite3StdTypeAffinity[];
extern const char sqlite3StdTypeMap[];
extern const char *sqlite3StdType[];
extern const unsigned char sqlite3UpperToLower[];
extern const unsigned char *sqlite3aLTb;
extern const unsigned char *sqlite3aEQb;
extern const unsigned char *sqlite3aGTb;
extern const unsigned char sqlite3CtypeMap[];
extern SQLITE_WSD struct Sqlite3Config sqlite3Config;
extern FuncDefHash sqlite3BuiltinFunctions;
#ifndef SQLITE_OMIT_WSD
extern int sqlite3PendingByte;
#endif
#endif /* SQLITE_AMALGAMATION */
#ifdef VDBE_PROFILE
extern sqlite3_uint64 sqlite3NProfileCnt;
#endif
void sqlite3RootPageMoved(sqlite3*, int, Pgno, Pgno);
void sqlite3Reindex(Parse*, Token*, Token*);
void sqlite3AlterFunctions(void);
void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*);
int sqlite3GetToken(const unsigned char *, int *);
void sqlite3NestedParse(Parse*, const char*, ...);
void sqlite3ExpirePreparedStatements(sqlite3*, int);
void sqlite3CodeRhsOfIN(Parse*, Expr*, int);
int sqlite3CodeSubselect(Parse*, Expr*);
void sqlite3SelectPrep(Parse*, Select*, NameContext*);
int sqlite3ExpandSubquery(Parse*, SrcItem*);
void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p);
int sqlite3MatchEName(
const struct ExprList_item*,
const char*,
const char*,
const char*
);
Bitmask sqlite3ExprColUsed(Expr*);
u8 sqlite3StrIHash(const char*);
int sqlite3ResolveExprNames(NameContext*, Expr*);
int sqlite3ResolveExprListNames(NameContext*, ExprList*);
void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);
int sqlite3ResolveSelfReference(Parse*,Table*,int,Expr*,ExprList*);
int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*);
void sqlite3ColumnDefault(Vdbe *, Table *, int, int);
void sqlite3AlterFinishAddColumn(Parse *, Token *);
void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
void sqlite3AlterDropColumn(Parse*, SrcList*, const Token*);
const void *sqlite3RenameTokenMap(Parse*, const void*, const Token*);
void sqlite3RenameTokenRemap(Parse*, const void *pTo, const void *pFrom);
void sqlite3RenameExprUnmap(Parse*, Expr*);
void sqlite3RenameExprlistUnmap(Parse*, ExprList*);
CollSeq *sqlite3GetCollSeq(Parse*, u8, CollSeq *, const char*);
char sqlite3AffinityType(const char*, Column*);
void sqlite3Analyze(Parse*, Token*, Token*);
int sqlite3InvokeBusyHandler(BusyHandler*);
int sqlite3FindDb(sqlite3*, Token*);
int sqlite3FindDbName(sqlite3 *, const char *);
int sqlite3AnalysisLoad(sqlite3*,int iDB);
void sqlite3DeleteIndexSamples(sqlite3*,Index*);
void sqlite3DefaultRowEst(Index*);
void sqlite3RegisterLikeFunctions(sqlite3*, int);
int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
void sqlite3SchemaClear(void *);
Schema *sqlite3SchemaGet(sqlite3 *, Btree *);
int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
KeyInfo *sqlite3KeyInfoAlloc(sqlite3*,int,int);
void sqlite3KeyInfoUnref(KeyInfo*);
KeyInfo *sqlite3KeyInfoRef(KeyInfo*);
KeyInfo *sqlite3KeyInfoOfIndex(Parse*, Index*);
KeyInfo *sqlite3KeyInfoFromExprList(Parse*, ExprList*, int, int);
const char *sqlite3SelectOpName(int);
int sqlite3HasExplicitNulls(Parse*, ExprList*);
#ifdef SQLITE_DEBUG
int sqlite3KeyInfoIsWriteable(KeyInfo*);
#endif
int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *,
void (*)(sqlite3_context*,int,sqlite3_value **),
void (*)(sqlite3_context*,int,sqlite3_value **),
void (*)(sqlite3_context*),
void (*)(sqlite3_context*),
void (*)(sqlite3_context*,int,sqlite3_value **),
FuncDestructor *pDestructor
);
void sqlite3NoopDestructor(void*);
void *sqlite3OomFault(sqlite3*);
void sqlite3OomClear(sqlite3*);
int sqlite3ApiExit(sqlite3 *db, int);
int sqlite3OpenTempDatabase(Parse *);
void sqlite3StrAccumInit(StrAccum*, sqlite3*, char*, int, int);
int sqlite3StrAccumEnlarge(StrAccum*, int);
char *sqlite3StrAccumFinish(StrAccum*);
void sqlite3StrAccumSetError(StrAccum*, u8);
void sqlite3ResultStrAccum(sqlite3_context*,StrAccum*);
void sqlite3SelectDestInit(SelectDest*,int,int);
Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int);
void sqlite3RecordErrorByteOffset(sqlite3*,const char*);
void sqlite3RecordErrorOffsetOfExpr(sqlite3*,const Expr*);
void sqlite3BackupRestart(sqlite3_backup *);
void sqlite3BackupUpdate(sqlite3_backup *, Pgno, const u8 *);
#ifndef SQLITE_OMIT_SUBQUERY
int sqlite3ExprCheckIN(Parse*, Expr*);
#else
# define sqlite3ExprCheckIN(x,y) SQLITE_OK
#endif
#ifdef SQLITE_ENABLE_STAT4
int sqlite3Stat4ProbeSetValue(
Parse*,Index*,UnpackedRecord**,Expr*,int,int,int*);
int sqlite3Stat4ValueFromExpr(Parse*, Expr*, u8, sqlite3_value**);
void sqlite3Stat4ProbeFree(UnpackedRecord*);
int sqlite3Stat4Column(sqlite3*, const void*, int, int, sqlite3_value**);
char sqlite3IndexColumnAffinity(sqlite3*, Index*, int);
#endif
/*
** The interface to the LEMON-generated parser
*/
#ifndef SQLITE_AMALGAMATION
void *sqlite3ParserAlloc(void*(*)(u64), Parse*);
void sqlite3ParserFree(void*, void(*)(void*));
#endif
void sqlite3Parser(void*, int, Token);
int sqlite3ParserFallback(int);
#ifdef YYTRACKMAXSTACKDEPTH
int sqlite3ParserStackPeak(void*);
#endif
void sqlite3AutoLoadExtensions(sqlite3*);
#ifndef SQLITE_OMIT_LOAD_EXTENSION
void sqlite3CloseExtensions(sqlite3*);
#else
# define sqlite3CloseExtensions(X)
#endif
#ifndef SQLITE_OMIT_SHARED_CACHE
void sqlite3TableLock(Parse *, int, Pgno, u8, const char *);
#else
#define sqlite3TableLock(v,w,x,y,z)
#endif
#ifdef SQLITE_TEST
int sqlite3Utf8To8(unsigned char*);
#endif
#ifdef SQLITE_OMIT_VIRTUALTABLE
# define sqlite3VtabClear(D,T)
# define sqlite3VtabSync(X,Y) SQLITE_OK
# define sqlite3VtabRollback(X)
# define sqlite3VtabCommit(X)
# define sqlite3VtabInSync(db) 0
# define sqlite3VtabLock(X)
# define sqlite3VtabUnlock(X)
# define sqlite3VtabModuleUnref(D,X)
# define sqlite3VtabUnlockList(X)
# define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK
# define sqlite3GetVTable(X,Y) ((VTable*)0)
#else
void sqlite3VtabClear(sqlite3 *db, Table*);
void sqlite3VtabDisconnect(sqlite3 *db, Table *p);
int sqlite3VtabSync(sqlite3 *db, Vdbe*);
int sqlite3VtabRollback(sqlite3 *db);
int sqlite3VtabCommit(sqlite3 *db);
void sqlite3VtabLock(VTable *);
void sqlite3VtabUnlock(VTable *);
void sqlite3VtabModuleUnref(sqlite3*,Module*);
void sqlite3VtabUnlockList(sqlite3*);
int sqlite3VtabSavepoint(sqlite3 *, int, int);
void sqlite3VtabImportErrmsg(Vdbe*, sqlite3_vtab*);
VTable *sqlite3GetVTable(sqlite3*, Table*);
Module *sqlite3VtabCreateModule(
sqlite3*,
const char*,
const sqlite3_module*,
void*,
void(*)(void*)
);
# define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0)
#endif
int sqlite3ReadOnlyShadowTables(sqlite3 *db);
#ifndef SQLITE_OMIT_VIRTUALTABLE
int sqlite3ShadowTableName(sqlite3 *db, const char *zName);
int sqlite3IsShadowTableOf(sqlite3*,Table*,const char*);
void sqlite3MarkAllShadowTablesOf(sqlite3*, Table*);
#else
# define sqlite3ShadowTableName(A,B) 0
# define sqlite3IsShadowTableOf(A,B,C) 0
# define sqlite3MarkAllShadowTablesOf(A,B)
#endif
int sqlite3VtabEponymousTableInit(Parse*,Module*);
void sqlite3VtabEponymousTableClear(sqlite3*,Module*);
void sqlite3VtabMakeWritable(Parse*,Table*);
void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*, int);
void sqlite3VtabFinishParse(Parse*, Token*);
void sqlite3VtabArgInit(Parse*);
void sqlite3VtabArgExtend(Parse*, Token*);
int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
int sqlite3VtabCallConnect(Parse*, Table*);
int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
int sqlite3VtabBegin(sqlite3 *, VTable *);
FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
#if (defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST)) \
&& !defined(SQLITE_OMIT_VIRTUALTABLE)
void sqlite3VtabUsesAllSchemas(sqlite3_index_info*);
#endif
sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*);
int sqlite3VdbeParameterIndex(Vdbe*, const char*, int);
int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *);
void sqlite3ParseObjectInit(Parse*,sqlite3*);
void sqlite3ParseObjectReset(Parse*);
void *sqlite3ParserAddCleanup(Parse*,void(*)(sqlite3*,void*),void*);
#ifdef SQLITE_ENABLE_NORMALIZE
char *sqlite3Normalize(Vdbe*, const char*);
#endif
int sqlite3Reprepare(Vdbe*);
void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
CollSeq *sqlite3ExprCompareCollSeq(Parse*,const Expr*);
CollSeq *sqlite3BinaryCompareCollSeq(Parse *, const Expr*, const Expr*);
int sqlite3TempInMemory(const sqlite3*);
const char *sqlite3JournalModename(int);
#ifndef SQLITE_OMIT_WAL
int sqlite3Checkpoint(sqlite3*, int, int, int*, int*);
int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int);
#endif
#ifndef SQLITE_OMIT_CTE
Cte *sqlite3CteNew(Parse*,Token*,ExprList*,Select*,u8);
void sqlite3CteDelete(sqlite3*,Cte*);
With *sqlite3WithAdd(Parse*,With*,Cte*);
void sqlite3WithDelete(sqlite3*,With*);
With *sqlite3WithPush(Parse*, With*, u8);
#else
# define sqlite3CteNew(P,T,E,S) ((void*)0)
# define sqlite3CteDelete(D,C)
# define sqlite3CteWithAdd(P,W,C) ((void*)0)
# define sqlite3WithDelete(x,y)
# define sqlite3WithPush(x,y,z) ((void*)0)
#endif
#ifndef SQLITE_OMIT_UPSERT
Upsert *sqlite3UpsertNew(sqlite3*,ExprList*,Expr*,ExprList*,Expr*,Upsert*);
void sqlite3UpsertDelete(sqlite3*,Upsert*);
Upsert *sqlite3UpsertDup(sqlite3*,Upsert*);
int sqlite3UpsertAnalyzeTarget(Parse*,SrcList*,Upsert*);
void sqlite3UpsertDoUpdate(Parse*,Upsert*,Table*,Index*,int);
Upsert *sqlite3UpsertOfIndex(Upsert*,Index*);
int sqlite3UpsertNextIsIPK(Upsert*);
#else
#define sqlite3UpsertNew(u,v,w,x,y,z) ((Upsert*)0)
#define sqlite3UpsertDelete(x,y)
#define sqlite3UpsertDup(x,y) ((Upsert*)0)
#define sqlite3UpsertOfIndex(x,y) ((Upsert*)0)
#define sqlite3UpsertNextIsIPK(x) 0
#endif
/* Declarations for functions in fkey.c. All of these are replaced by
** no-op macros if OMIT_FOREIGN_KEY is defined. In this case no foreign
** key functionality is available. If OMIT_TRIGGER is defined but
** OMIT_FOREIGN_KEY is not, only some of the functions are no-oped. In
** this case foreign keys are parsed, but no other functionality is
** provided (enforcement of FK constraints requires the triggers sub-system).
*/
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
void sqlite3FkCheck(Parse*, Table*, int, int, int*, int);
void sqlite3FkDropTable(Parse*, SrcList *, Table*);
void sqlite3FkActions(Parse*, Table*, ExprList*, int, int*, int);
int sqlite3FkRequired(Parse*, Table*, int*, int);
u32 sqlite3FkOldmask(Parse*, Table*);
FKey *sqlite3FkReferences(Table *);
void sqlite3FkClearTriggerCache(sqlite3*,int);
#else
#define sqlite3FkActions(a,b,c,d,e,f)
#define sqlite3FkCheck(a,b,c,d,e,f)
#define sqlite3FkDropTable(a,b,c)
#define sqlite3FkOldmask(a,b) 0
#define sqlite3FkRequired(a,b,c,d) 0
#define sqlite3FkReferences(a) 0
#define sqlite3FkClearTriggerCache(a,b)
#endif
#ifndef SQLITE_OMIT_FOREIGN_KEY
void sqlite3FkDelete(sqlite3 *, Table*);
int sqlite3FkLocateIndex(Parse*,Table*,FKey*,Index**,int**);
#else
#define sqlite3FkDelete(a,b)
#define sqlite3FkLocateIndex(a,b,c,d,e)
#endif
/*
** Available fault injectors. Should be numbered beginning with 0.
*/
#define SQLITE_FAULTINJECTOR_MALLOC 0
#define SQLITE_FAULTINJECTOR_COUNT 1
/*
** The interface to the code in fault.c used for identifying "benign"
** malloc failures. This is only present if SQLITE_UNTESTABLE
** is not defined.
*/
#ifndef SQLITE_UNTESTABLE
void sqlite3BeginBenignMalloc(void);
void sqlite3EndBenignMalloc(void);
#else
#define sqlite3BeginBenignMalloc()
#define sqlite3EndBenignMalloc()
#endif
/*
** Allowed return values from sqlite3FindInIndex()
*/
#define IN_INDEX_ROWID 1 /* Search the rowid of the table */
#define IN_INDEX_EPH 2 /* Search an ephemeral b-tree */
#define IN_INDEX_INDEX_ASC 3 /* Existing index ASCENDING */
#define IN_INDEX_INDEX_DESC 4 /* Existing index DESCENDING */
#define IN_INDEX_NOOP 5 /* No table available. Use comparisons */
/*
** Allowed flags for the 3rd parameter to sqlite3FindInIndex().
*/
#define IN_INDEX_NOOP_OK 0x0001 /* OK to return IN_INDEX_NOOP */
#define IN_INDEX_MEMBERSHIP 0x0002 /* IN operator used for membership test */
#define IN_INDEX_LOOP 0x0004 /* IN operator used as a loop */
int sqlite3FindInIndex(Parse *, Expr *, u32, int*, int*, int*);
int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int);
int sqlite3JournalSize(sqlite3_vfs *);
#if defined(SQLITE_ENABLE_ATOMIC_WRITE) \
|| defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
int sqlite3JournalCreate(sqlite3_file *);
#endif
int sqlite3JournalIsInMemory(sqlite3_file *p);
void sqlite3MemJournalOpen(sqlite3_file *);
void sqlite3ExprSetHeightAndFlags(Parse *pParse, Expr *p);
#if SQLITE_MAX_EXPR_DEPTH>0
int sqlite3SelectExprHeight(const Select *);
int sqlite3ExprCheckHeight(Parse*, int);
#else
#define sqlite3SelectExprHeight(x) 0
#define sqlite3ExprCheckHeight(x,y)
#endif
u32 sqlite3Get4byte(const u8*);
void sqlite3Put4byte(u8*, u32);
#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
void sqlite3ConnectionBlocked(sqlite3 *, sqlite3 *);
void sqlite3ConnectionUnlocked(sqlite3 *db);
void sqlite3ConnectionClosed(sqlite3 *db);
#else
#define sqlite3ConnectionBlocked(x,y)
#define sqlite3ConnectionUnlocked(x)
#define sqlite3ConnectionClosed(x)
#endif
#ifdef SQLITE_DEBUG
void sqlite3ParserTrace(FILE*, char *);
#endif
#if defined(YYCOVERAGE)
int sqlite3ParserCoverage(FILE*);
#endif
/*
** If the SQLITE_ENABLE IOTRACE exists then the global variable
** sqlite3IoTrace is a pointer to a printf-like routine used to
** print I/O tracing messages.
*/
#ifdef SQLITE_ENABLE_IOTRACE
# define IOTRACE(A) if( sqlite3IoTrace ){ sqlite3IoTrace A; }
void sqlite3VdbeIOTraceSql(Vdbe*);
SQLITE_API SQLITE_EXTERN void (SQLITE_CDECL *sqlite3IoTrace)(const char*,...);
#else
# define IOTRACE(A)
# define sqlite3VdbeIOTraceSql(X)
#endif
/*
** These routines are available for the mem2.c debugging memory allocator
** only. They are used to verify that different "types" of memory
** allocations are properly tracked by the system.
**
** sqlite3MemdebugSetType() sets the "type" of an allocation to one of
** the MEMTYPE_* macros defined below. The type must be a bitmask with
** a single bit set.
**
** sqlite3MemdebugHasType() returns true if any of the bits in its second
** argument match the type set by the previous sqlite3MemdebugSetType().
** sqlite3MemdebugHasType() is intended for use inside assert() statements.
**
** sqlite3MemdebugNoType() returns true if none of the bits in its second
** argument match the type set by the previous sqlite3MemdebugSetType().
**
** Perhaps the most important point is the difference between MEMTYPE_HEAP
** and MEMTYPE_LOOKASIDE. If an allocation is MEMTYPE_LOOKASIDE, that means
** it might have been allocated by lookaside, except the allocation was
** too large or lookaside was already full. It is important to verify
** that allocations that might have been satisfied by lookaside are not
** passed back to non-lookaside free() routines. Asserts such as the
** example above are placed on the non-lookaside free() routines to verify
** this constraint.
**
** All of this is no-op for a production build. It only comes into
** play when the SQLITE_MEMDEBUG compile-time option is used.
*/
#ifdef SQLITE_MEMDEBUG
void sqlite3MemdebugSetType(void*,u8);
int sqlite3MemdebugHasType(const void*,u8);
int sqlite3MemdebugNoType(const void*,u8);
#else
# define sqlite3MemdebugSetType(X,Y) /* no-op */
# define sqlite3MemdebugHasType(X,Y) 1
# define sqlite3MemdebugNoType(X,Y) 1
#endif
#define MEMTYPE_HEAP 0x01 /* General heap allocations */
#define MEMTYPE_LOOKASIDE 0x02 /* Heap that might have been lookaside */
#define MEMTYPE_PCACHE 0x04 /* Page cache allocations */
/*
** Threading interface
*/
#if SQLITE_MAX_WORKER_THREADS>0
int sqlite3ThreadCreate(SQLiteThread**,void*(*)(void*),void*);
int sqlite3ThreadJoin(SQLiteThread*, void**);
#endif
#if defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST)
int sqlite3DbpageRegister(sqlite3*);
#endif
#if defined(SQLITE_ENABLE_DBSTAT_VTAB) || defined(SQLITE_TEST)
int sqlite3DbstatRegister(sqlite3*);
#endif
int sqlite3ExprVectorSize(const Expr *pExpr);
int sqlite3ExprIsVector(const Expr *pExpr);
Expr *sqlite3VectorFieldSubexpr(Expr*, int);
Expr *sqlite3ExprForVectorField(Parse*,Expr*,int,int);
void sqlite3VectorErrorMsg(Parse*, Expr*);
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
const char **sqlite3CompileOptions(int *pnOpt);
#endif
#endif /* SQLITEINT_H */