| /* |
| ** 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_ |
| |
| /* |
| ** 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. |
| ** |
| ** 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 |
| |
| /* |
| ** Include the configuration header output by 'configure' if we're using the |
| ** autoconf-based build |
| */ |
| #ifdef _HAVE_SQLITE_CONFIG_H |
| #include "config.h" |
| #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 |
| |
| /* Needed for various definitions... */ |
| #ifndef _GNU_SOURCE |
| # define _GNU_SOURCE |
| #endif |
| |
| /* |
| ** Include standard header files as necessary |
| */ |
| #ifdef HAVE_STDINT_H |
| #include <stdint.h> |
| #endif |
| #ifdef HAVE_INTTYPES_H |
| #include <inttypes.h> |
| #endif |
| |
| /* |
| ** The number of samples of an index that SQLite takes in order to |
| ** construct a histogram of the table content when running ANALYZE |
| ** and with SQLITE_ENABLE_STAT2 |
| */ |
| #define SQLITE_INDEX_SAMPLES 10 |
| |
| /* |
| ** 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(__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)) |
| #elif 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)) |
| #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 |
| |
| /* |
| ** 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 libary 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. |
| */ |
| #if !defined(SQLITE_THREADSAFE) |
| #if defined(THREADSAFE) |
| # define SQLITE_THREADSAFE THREADSAFE |
| #else |
| # define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */ |
| #endif |
| #endif |
| |
| /* |
| ** The SQLITE_DEFAULT_MEMSTATUS macro must be defined as either 0 or 1. |
| ** It determines whether or not the features related to |
| ** SQLITE_CONFIG_MEMSTATUS are available by default or not. This value can |
| ** be overridden at runtime using the sqlite3_config() API. |
| */ |
| #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_MEMDEBUG // Debugging version of system malloc() |
| ** |
| ** (Historical note: There used to be several other options, but we've |
| ** pared it down to just these two.) |
| ** |
| ** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as |
| ** the default. |
| */ |
| #if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)>1 |
| # error "At most one of the following compile-time configuration options\ |
| is allows: SQLITE_SYSTEM_MALLOC, SQLITE_MEMDEBUG" |
| #endif |
| #if defined(SQLITE_SYSTEM_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. But Mac OS X is different. |
| ** The _XOPEN_SOURCE define causes problems for Mac OS X we are told, |
| ** so it is omitted there. See ticket #2673. |
| ** |
| ** Later we learn that _XOPEN_SOURCE is poorly or incorrectly |
| ** implemented on some systems. So we avoid defining it at all |
| ** if it is already defined or if it is unneeded because we are |
| ** not doing a threadsafe build. Ticket #2681. |
| ** |
| ** See also ticket #2741. |
| */ |
| #if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__) && SQLITE_THREADSAFE |
| # define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */ |
| #endif |
| |
| /* |
| ** The TCL headers are only needed when compiling the TCL bindings. |
| */ |
| #if defined(SQLITE_TCL) || defined(TCLSH) |
| # include <tcl.h> |
| #endif |
| |
| /* |
| ** Many people are failing to set -DNDEBUG=1 when compiling SQLite. |
| ** Setting NDEBUG makes the code smaller and run faster. So the following |
| ** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1 |
| ** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out |
| ** feature. |
| */ |
| #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) |
| # define NDEBUG 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. |
| ** |
| */ |
| #ifdef SQLITE_COVERAGE_TEST |
| void sqlite3Coverage(int); |
| # define testcase(X) if( X ){ sqlite3Coverage(__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 |
| |
| /* |
| ** 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 then specify will |
| ** not be counted as untested code. |
| */ |
| #if defined(SQLITE_COVERAGE_TEST) |
| # 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 |
| |
| /* |
| ** Return true (non-zero) if the input is a 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. GCC is able to |
| ** use these hints to generate better code, sometimes. |
| */ |
| #if defined(__GNUC__) && 0 |
| # define likely(X) __builtin_expect((X),1) |
| # define unlikely(X) __builtin_expect((X),0) |
| #else |
| # define likely(X) !!(X) |
| # define unlikely(X) !!(X) |
| #endif |
| |
| #include "sqlite3.h" |
| #include "hash.h" |
| #include "parse.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <assert.h> |
| #include <stddef.h> |
| |
| /* |
| ** 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 1 |
| #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 |
| |
| /* |
| ** 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 |
| |
| /* |
| ** 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) |
| |
| /* |
| ** Macros to determine whether the machine is big or little endian, |
| ** evaluated at runtime. |
| */ |
| #ifdef SQLITE_AMALGAMATION |
| const int sqlite3one = 1; |
| #else |
| extern const int sqlite3one; |
| #endif |
| #if defined(i386) || defined(__i386__) || defined(_M_IX86)\ |
| || defined(__x86_64) || defined(__x86_64__) |
| # define SQLITE_BIGENDIAN 0 |
| # define SQLITE_LITTLEENDIAN 1 |
| # define SQLITE_UTF16NATIVE SQLITE_UTF16LE |
| #else |
| # 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 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. |
| */ |
| #define ROUND8(x) (((x)+7)&~7) |
| |
| /* |
| ** 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() implemention 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 |
| |
| |
| /* |
| ** 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 (*xFunc)(void *,int); /* The busy callback */ |
| void *pArg; /* First arg to busy callback */ |
| int nBusy; /* Incremented with each busy call */ |
| }; |
| |
| /* |
| ** Name of the master database table. The master database table |
| ** is a special table that holds the names and attributes of all |
| ** user tables and indices. |
| */ |
| #define MASTER_NAME "sqlite_master" |
| #define TEMP_MASTER_NAME "sqlite_temp_master" |
| |
| /* |
| ** The root-page of the master database table. |
| */ |
| #define MASTER_ROOT 1 |
| |
| /* |
| ** The name of the schema table. |
| */ |
| #define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME) |
| |
| /* |
| ** A convenience macro that returns the number of elements in |
| ** an array. |
| */ |
| #define ArraySize(X) ((int)(sizeof(X)/sizeof(X[0]))) |
| |
| /* |
| ** The following value as a destructor means to use sqlite3DbFree(). |
| ** This is an internal extension to SQLITE_STATIC and SQLITE_TRANSIENT. |
| */ |
| #define SQLITE_DYNAMIC ((sqlite3_destructor_type)sqlite3DbFree) |
| |
| /* |
| ** 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 Db Db; |
| typedef struct Schema Schema; |
| typedef struct Expr Expr; |
| typedef struct ExprList ExprList; |
| typedef struct ExprSpan ExprSpan; |
| 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 Parse Parse; |
| typedef struct RowSet RowSet; |
| typedef struct Savepoint Savepoint; |
| typedef struct Select Select; |
| typedef struct SrcList SrcList; |
| typedef struct StrAccum StrAccum; |
| typedef struct Table Table; |
| typedef struct TableLock TableLock; |
| typedef struct Token Token; |
| typedef struct Trigger Trigger; |
| typedef struct TriggerPrg TriggerPrg; |
| typedef struct TriggerStep TriggerStep; |
| typedef struct UnpackedRecord UnpackedRecord; |
| typedef struct VTable VTable; |
| typedef struct Walker Walker; |
| typedef struct WherePlan WherePlan; |
| typedef struct WhereInfo WhereInfo; |
| typedef struct WhereLevel WhereLevel; |
| |
| /* |
| ** 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 "btree.h" |
| #include "vdbe.h" |
| #include "pager.h" |
| #include "pcache.h" |
| |
| #include "os.h" |
| #include "mutex.h" |
| |
| |
| /* |
| ** 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 *zName; /* Name of this database */ |
| Btree *pBt; /* The B*Tree structure for this database file */ |
| u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */ |
| u8 safety_level; /* How aggressive at syncing data to disk */ |
| 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, on 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 flags; /* 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->flags&(P))==(P)) |
| #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0) |
| #define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P) |
| #define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(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_Empty 0x0004 /* The file is empty (length 0 bytes) */ |
| |
| /* |
| ** The number of different kinds of things that can be limited |
| ** using the sqlite3_limit() interface. |
| */ |
| #define SQLITE_N_LIMIT (SQLITE_LIMIT_TRIGGER_DEPTH+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. |
| */ |
| struct Lookaside { |
| u16 sz; /* Size of each buffer in bytes */ |
| u8 bEnabled; /* False to disable new lookaside allocations */ |
| u8 bMalloced; /* True if pStart obtained from sqlite3_malloc() */ |
| int nOut; /* Number of buffers currently checked out */ |
| int mxOut; /* Highwater mark for nOut */ |
| int anStat[3]; /* 0: hits. 1: size misses. 2: full misses */ |
| LookasideSlot *pFree; /* List of available buffers */ |
| 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 */ |
| }; |
| |
| /* |
| ** A hash table for function definitions. |
| ** |
| ** Hash each FuncDef structure into one of the FuncDefHash.a[] slots. |
| ** Collisions are on the FuncDef.pHash chain. |
| */ |
| struct FuncDefHash { |
| FuncDef *a[23]; /* Hash table for functions */ |
| }; |
| |
| /* |
| ** Each database connection is an instance of the following structure. |
| ** |
| ** The sqlite.lastRowid records the last insert rowid generated by an |
| ** insert statement. Inserts on views do not affect its value. Each |
| ** trigger has its own context, so that lastRowid can be updated inside |
| ** triggers as usual. The previous value will be restored once the trigger |
| ** exits. Upon entering a before or instead of trigger, lastRowid is no |
| ** longer (since after version 2.8.12) reset to -1. |
| ** |
| ** The sqlite.nChange does not count changes within triggers and keeps no |
| ** context. It is reset at start of sqlite3_exec. |
| ** The sqlite.lsChange represents the number of changes made by the last |
| ** insert, update, or delete statement. It remains constant throughout the |
| ** length of a statement and is then updated by OP_SetCounts. It keeps a |
| ** context stack just like lastRowid so that the count of changes |
| ** within a trigger is not seen outside the trigger. Changes to views do not |
| ** affect the value of lsChange. |
| ** The sqlite.csChange keeps track of the number of current changes (since |
| ** the last statement) and is used to update sqlite_lsChange. |
| ** |
| ** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16 |
| ** store the most recent error code and, if applicable, string. The |
| ** internal function sqlite3Error() is used to set these variables |
| ** consistently. |
| */ |
| struct sqlite3 { |
| sqlite3_vfs *pVfs; /* OS Interface */ |
| int nDb; /* Number of backends currently in use */ |
| Db *aDb; /* All backends */ |
| int flags; /* Miscellaneous flags. See below */ |
| int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ |
| int errCode; /* Most recent error code (SQLITE_*) */ |
| int errMask; /* & result codes with this before returning */ |
| 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 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 */ |
| int nextPagesize; /* Pagesize after VACUUM if >0 */ |
| int nTable; /* Number of tables in the database */ |
| CollSeq *pDfltColl; /* The default collating sequence (BINARY) */ |
| i64 lastRowid; /* ROWID of most recent insert (see above) */ |
| u32 magic; /* Magic number for detect library misuse */ |
| int nChange; /* Value returned by sqlite3_changes() */ |
| int nTotalChange; /* Value returned by sqlite3_total_changes() */ |
| sqlite3_mutex *mutex; /* Connection mutex */ |
| int aLimit[SQLITE_N_LIMIT]; /* Limits */ |
| struct sqlite3InitInfo { /* Information used during initialization */ |
| int iDb; /* When back is being initialized */ |
| int newTnum; /* Rootpage of table being initialized */ |
| u8 busy; /* TRUE if currently initializing */ |
| u8 orphanTrigger; /* Last statement is orphaned TEMP trigger */ |
| } init; |
| int nExtension; /* Number of loaded extensions */ |
| void **aExtension; /* Array of shared library handles */ |
| struct Vdbe *pVdbe; /* List of active virtual machines */ |
| int activeVdbeCnt; /* Number of VDBEs currently executing */ |
| int writeVdbeCnt; /* Number of active VDBEs that are writing */ |
| int vdbeExecCnt; /* Number of nested calls to VdbeExec() */ |
| void (*xTrace)(void*,const char*); /* Trace function */ |
| void *pTraceArg; /* Argument to the trace function */ |
| void (*xProfile)(void*,const char*,u64); /* Profiling function */ |
| void *pProfileArg; /* Argument to profile function */ |
| 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); |
| #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 */ |
| char *zErrMsg; /* Most recent error message (UTF-8 encoded) */ |
| char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */ |
| union { |
| volatile int isInterrupted; /* True if sqlite3_interrupt has been called */ |
| double notUsed1; /* Spacer */ |
| } u1; |
| Lookaside lookaside; /* Lookaside malloc configuration */ |
| #ifndef SQLITE_OMIT_AUTHORIZATION |
| int (*xAuth)(void*,int,const char*,const char*,const char*,const char*); |
| /* 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 */ |
| int nProgressOps; /* Number of opcodes for progress callback */ |
| #endif |
| #ifndef SQLITE_OMIT_VIRTUALTABLE |
| Hash aModule; /* populated by sqlite3_create_module() */ |
| Table *pVTab; /* vtab with active Connect/Create method */ |
| VTable **aVTrans; /* Virtual tables with open transactions */ |
| int nVTrans; /* Allocated size of aVTrans */ |
| VTable *pDisconnect; /* Disconnect these in next sqlite3_prepare() */ |
| #endif |
| FuncDefHash aFunc; /* Hash table of connection functions */ |
| Hash aCollSeq; /* All collating sequences */ |
| BusyHandler busyHandler; /* Busy callback */ |
| int busyTimeout; /* Busy handler timeout, in msec */ |
| Db aDbStatic[2]; /* Static space for the 2 default backends */ |
| Savepoint *pSavepoint; /* List of active savepoints */ |
| int nSavepoint; /* Number of non-transaction savepoints */ |
| int nStatement; /* Number of nested statement-transactions */ |
| u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */ |
| i64 nDeferredCons; /* Net deferred constraints this transaction. */ |
| int *pnBytesFreed; /* If not NULL, increment this in DbFree() */ |
| |
| #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY |
| /* The following variables are all protected by the STATIC_MASTER |
| ** 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 |
| }; |
| |
| /* |
| ** A macro to discover the encoding of a database. |
| */ |
| #define ENC(db) ((db)->aDb[0].pSchema->enc) |
| |
| /* |
| ** Possible values for the sqlite3.flags. |
| */ |
| #define SQLITE_VdbeTrace 0x00000100 /* True to trace VDBE execution */ |
| #define SQLITE_InternChanges 0x00000200 /* Uncommitted Hash table changes */ |
| #define SQLITE_FullColNames 0x00000400 /* Show full column names on SELECT */ |
| #define SQLITE_ShortColNames 0x00000800 /* Show short columns names */ |
| #define SQLITE_CountRows 0x00001000 /* Count rows changed by INSERT, */ |
| /* DELETE, or UPDATE and return */ |
| /* the count using a callback. */ |
| #define SQLITE_NullCallback 0x00002000 /* Invoke the callback once if the */ |
| /* result set is empty */ |
| #define SQLITE_SqlTrace 0x00004000 /* Debug print SQL as it executes */ |
| #define SQLITE_VdbeListing 0x00008000 /* Debug listings of VDBE programs */ |
| #define SQLITE_WriteSchema 0x00010000 /* OK to update SQLITE_MASTER */ |
| #define SQLITE_NoReadlock 0x00020000 /* Readlocks are omitted when |
| ** accessing read-only databases */ |
| #define SQLITE_IgnoreChecks 0x00040000 /* Do not enforce check constraints */ |
| #define SQLITE_ReadUncommitted 0x0080000 /* For shared-cache mode */ |
| #define SQLITE_LegacyFileFmt 0x00100000 /* Create new databases in format 1 */ |
| #define SQLITE_FullFSync 0x00200000 /* Use full fsync on the backend */ |
| #define SQLITE_CkptFullFSync 0x00400000 /* Use full fsync for checkpoint */ |
| #define SQLITE_RecoveryMode 0x00800000 /* Ignore schema errors */ |
| #define SQLITE_ReverseOrder 0x01000000 /* Reverse unordered SELECTs */ |
| #define SQLITE_RecTriggers 0x02000000 /* Enable recursive triggers */ |
| #define SQLITE_ForeignKeys 0x04000000 /* Enforce foreign key constraints */ |
| #define SQLITE_AutoIndex 0x08000000 /* Enable automatic indexes */ |
| #define SQLITE_PreferBuiltin 0x10000000 /* Preference to built-in funcs */ |
| #define SQLITE_LoadExtension 0x20000000 /* Enable load_extension */ |
| #define SQLITE_EnableTrigger 0x40000000 /* True to enable triggers */ |
| |
| /* |
| ** Bits of the sqlite3.flags field that are used by the |
| ** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface. |
| ** These must be the low-order bits of the flags field. |
| */ |
| #define SQLITE_QueryFlattener 0x01 /* Disable query flattening */ |
| #define SQLITE_ColumnCache 0x02 /* Disable the column cache */ |
| #define SQLITE_IndexSort 0x04 /* Disable indexes for sorting */ |
| #define SQLITE_IndexSearch 0x08 /* Disable indexes for searching */ |
| #define SQLITE_IndexCover 0x10 /* Disable index covering table */ |
| #define SQLITE_GroupByOrder 0x20 /* Disable GROUPBY cover of ORDERBY */ |
| #define SQLITE_FactorOutConst 0x40 /* Disable factoring out constants */ |
| #define SQLITE_OptMask 0xff /* Mask of all disablable opts */ |
| |
| /* |
| ** Possible values for the sqlite.magic field. |
| ** The numbers are obtained at random and have no special meaning, other |
| ** than being distinct from one another. |
| */ |
| #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ |
| #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ |
| #define SQLITE_MAGIC_SICK 0x4b771290 /* Error and awaiting close */ |
| #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ |
| #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ |
| |
| /* |
| ** Each SQL function is defined by an instance of the following |
| ** structure. A pointer to this structure is stored in the sqlite.aFunc |
| ** hash table. When multiple functions have the same name, the hash table |
| ** points to a linked list of these structures. |
| */ |
| struct FuncDef { |
| i16 nArg; /* Number of arguments. -1 means unlimited */ |
| u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */ |
| u8 flags; /* Some combination of SQLITE_FUNC_* */ |
| void *pUserData; /* User data parameter */ |
| FuncDef *pNext; /* Next function with same name */ |
| void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */ |
| void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */ |
| void (*xFinalize)(sqlite3_context*); /* Aggregate finalizer */ |
| char *zName; /* SQL name of the function. */ |
| FuncDef *pHash; /* Next with a different name but the same hash */ |
| FuncDestructor *pDestructor; /* Reference counted destructor function */ |
| }; |
| |
| /* |
| ** 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 |
| */ |
| #define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */ |
| #define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */ |
| #define SQLITE_FUNC_EPHEM 0x04 /* Ephemeral. Delete with VDBE */ |
| #define SQLITE_FUNC_NEEDCOLL 0x08 /* sqlite3GetFuncCollSeq() might be called */ |
| #define SQLITE_FUNC_PRIVATE 0x10 /* Allowed for internal use only */ |
| #define SQLITE_FUNC_COUNT 0x20 /* Built-in count(*) aggregate */ |
| #define SQLITE_FUNC_COALESCE 0x40 /* Built-in coalesce() or ifnull() function */ |
| |
| /* |
| ** 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. |
| ** |
| ** 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(). |
| ** |
| ** 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_UTF8, bNC*SQLITE_FUNC_NEEDCOLL, \ |
| SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, #zName, 0, 0} |
| #define STR_FUNCTION(zName, nArg, pArg, bNC, xFunc) \ |
| {nArg, SQLITE_UTF8, bNC*SQLITE_FUNC_NEEDCOLL, \ |
| pArg, 0, xFunc, 0, 0, #zName, 0, 0} |
| #define LIKEFUNC(zName, nArg, arg, flags) \ |
| {nArg, SQLITE_UTF8, flags, (void *)arg, 0, likeFunc, 0, 0, #zName, 0, 0} |
| #define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal) \ |
| {nArg, SQLITE_UTF8, nc*SQLITE_FUNC_NEEDCOLL, \ |
| SQLITE_INT_TO_PTR(arg), 0, 0, xStep,xFinal,#zName,0,0} |
| |
| /* |
| ** 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 */ |
| 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() */ |
| void *pAux; /* pAux passed to create_module() */ |
| void (*xDestroy)(void *); /* Module destructor function */ |
| }; |
| |
| /* |
| ** information about each column of an SQL table is held in an instance |
| ** of this structure. |
| */ |
| struct Column { |
| char *zName; /* Name of this column */ |
| Expr *pDflt; /* Default value of this column */ |
| char *zDflt; /* Original text of the default value */ |
| char *zType; /* Data type for this column */ |
| char *zColl; /* Collating sequence. If NULL, use the default */ |
| u8 notNull; /* True if there is a NOT NULL constraint */ |
| u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */ |
| char affinity; /* One of the SQLITE_AFF_... values */ |
| #ifndef SQLITE_OMIT_VIRTUALTABLE |
| u8 isHidden; /* True if this column is 'hidden' */ |
| #endif |
| }; |
| |
| /* |
| ** 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. |
| ** |
| ** There may two separate implementations of the collation function, one |
| ** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that |
| ** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine |
| ** native byte order. When a collation sequence is invoked, SQLite selects |
| ** the version that will require the least expensive encoding |
| ** translations, if any. |
| ** |
| ** The CollSeq.pUser member variable is an extra parameter that passed in |
| ** as the first argument to the UTF-8 comparison function, xCmp. |
| ** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function, |
| ** xCmp16. |
| ** |
| ** If both CollSeq.xCmp and CollSeq.xCmp16 are 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() */ |
| u8 type; /* One of the SQLITE_COLL_... values below */ |
| void *pUser; /* First argument to xCmp() */ |
| int (*xCmp)(void*,int, const void*, int, const void*); |
| void (*xDel)(void*); /* Destructor for pUser */ |
| }; |
| |
| /* |
| ** Allowed values of CollSeq.type: |
| */ |
| #define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */ |
| #define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */ |
| #define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */ |
| #define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */ |
| |
| /* |
| ** 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 */ |
| |
| /* |
| ** 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. |
| */ |
| #define SQLITE_AFF_TEXT 'a' |
| #define SQLITE_AFF_NONE 'b' |
| #define SQLITE_AFF_NUMERIC 'c' |
| #define SQLITE_AFF_INTEGER 'd' |
| #define SQLITE_AFF_REAL '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 0x67 |
| |
| /* |
| ** Additional bit values that can be ORed with an affinity without |
| ** changing the affinity. |
| */ |
| #define SQLITE_JUMPIFNULL 0x08 /* jumps if either operand is NULL */ |
| #define SQLITE_STOREP2 0x10 /* Store result in reg[P2] rather than jump */ |
| #define SQLITE_NULLEQ 0x80 /* NULL=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 */ |
| VTable *pNext; /* Next in linked list (see above) */ |
| }; |
| |
| /* |
| ** Each SQL table is represented in memory by an instance of the |
| ** following structure. |
| ** |
| ** Table.zName is the name of the table. The case of the original |
| ** CREATE TABLE statement is stored, but case is not significant for |
| ** comparisons. |
| ** |
| ** Table.nCol is the number of columns in this table. Table.aCol is a |
| ** pointer to an array of Column structures, one for each column. |
| ** |
| ** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of |
| ** the column that is that key. Otherwise Table.iPKey is negative. Note |
| ** that the datatype of the PRIMARY KEY must be INTEGER for this field to |
| ** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of |
| ** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid |
| ** is generated for each row of the table. TF_HasPrimaryKey is set if |
| ** the table has any PRIMARY KEY, INTEGER or otherwise. |
| ** |
| ** Table.tnum is the page number for the root BTree page of the table in the |
| ** database file. If Table.iDb is the index of the database table backend |
| ** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that |
| ** holds temporary tables and indices. If TF_Ephemeral is set |
| ** then the table is stored in a file that is automatically deleted |
| ** when the VDBE cursor to the table is closed. In this case Table.tnum |
| ** refers VDBE cursor number that holds the table open, not to the root |
| ** page number. Transient tables are used to hold the results of a |
| ** sub-query that appears instead of a real table name in the FROM clause |
| ** of a SELECT statement. |
| */ |
| struct Table { |
| char *zName; /* Name of the table or view */ |
| int iPKey; /* If not negative, use aCol[iPKey] as the primary key */ |
| int nCol; /* Number of columns in this table */ |
| Column *aCol; /* Information about each column */ |
| Index *pIndex; /* List of SQL indexes on this table. */ |
| int tnum; /* Root BTree node for this table (see note above) */ |
| unsigned nRowEst; /* Estimated rows in table - from sqlite_stat1 table */ |
| Select *pSelect; /* NULL for tables. Points to definition if a view. */ |
| u16 nRef; /* Number of pointers to this Table */ |
| u8 tabFlags; /* Mask of TF_* values */ |
| u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ |
| FKey *pFKey; /* Linked list of all foreign keys in this table */ |
| char *zColAff; /* String defining the affinity of each column */ |
| #ifndef SQLITE_OMIT_CHECK |
| Expr *pCheck; /* The AND of all CHECK constraints */ |
| #endif |
| #ifndef SQLITE_OMIT_ALTERTABLE |
| int addColOffset; /* Offset in CREATE TABLE stmt to add a new column */ |
| #endif |
| #ifndef SQLITE_OMIT_VIRTUALTABLE |
| VTable *pVTable; /* List of VTable objects. */ |
| int nModuleArg; /* Number of arguments to the module */ |
| char **azModuleArg; /* Text of all module args. [0] is module name */ |
| #endif |
| Trigger *pTrigger; /* List of triggers stored in pSchema */ |
| Schema *pSchema; /* Schema that contains this table */ |
| Table *pNextZombie; /* Next on the Parse.pZombieTab list */ |
| }; |
| |
| /* |
| ** Allowed values for Tabe.tabFlags. |
| */ |
| #define TF_Readonly 0x01 /* Read-only system table */ |
| #define TF_Ephemeral 0x02 /* An ephemeral table */ |
| #define TF_HasPrimaryKey 0x04 /* Table has a primary key */ |
| #define TF_Autoincrement 0x08 /* Integer primary key is autoincrement */ |
| #define TF_Virtual 0x10 /* Is a virtual table */ |
| #define TF_NeedMetadata 0x20 /* aCol[].zType and aCol[].pColl missing */ |
| |
| |
| |
| /* |
| ** 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)->tabFlags & TF_Virtual)!=0) |
| # define IsHiddenColumn(X) ((X)->isHidden) |
| #else |
| # define IsVirtual(X) 0 |
| # define IsHiddenColumn(X) 0 |
| #endif |
| |
| /* |
| ** 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". |
| ** |
| ** 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. |
| */ |
| struct FKey { |
| Table *pFrom; /* Table containing the REFERENCES clause (aka: Child) */ |
| FKey *pNextFrom; /* Next foreign key in pFrom */ |
| char *zTo; /* Name of table that the key points to (aka: Parent) */ |
| FKey *pNextTo; /* Next foreign key on table named zTo */ |
| FKey *pPrevTo; /* Previous foreign key on table named 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 0 use PRIMARY KEY */ |
| } aCol[1]; /* One entry for each of nCol column s */ |
| }; |
| |
| /* |
| ** 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. |
| ** |
| ** RESTRICT, SETNULL, 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. CASCADE means that a DELETE or UPDATE of the |
| ** referenced table row is propagated into the row that holds the |
| ** foreign key. |
| ** |
| ** The following symbolic values are used to record which type |
| ** of 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_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ |
| #define OE_SetNull 7 /* Set the foreign key value to NULL */ |
| #define OE_SetDflt 8 /* Set the foreign key value to its default */ |
| #define OE_Cascade 9 /* Cascade the changes */ |
| |
| #define OE_Default 99 /* 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. |
| */ |
| struct KeyInfo { |
| sqlite3 *db; /* The database connection */ |
| u8 enc; /* Text encoding - one of the SQLITE_UTF* values */ |
| u16 nField; /* Number of entries in aColl[] */ |
| u8 *aSortOrder; /* Sort order for each column. May be NULL */ |
| CollSeq *aColl[1]; /* Collating sequence for each term of the key */ |
| }; |
| |
| /* |
| ** An instance of the following structure holds information about a |
| ** single index record that has already been parsed out into individual |
| ** values. |
| ** |
| ** 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. |
| ** |
| ** This structure holds a record that has already been disassembled |
| ** into its constituent fields. |
| */ |
| struct UnpackedRecord { |
| KeyInfo *pKeyInfo; /* Collation and sort-order information */ |
| u16 nField; /* Number of entries in apMem[] */ |
| u16 flags; /* Boolean settings. UNPACKED_... below */ |
| i64 rowid; /* Used by UNPACKED_PREFIX_SEARCH */ |
| Mem *aMem; /* Values */ |
| }; |
| |
| /* |
| ** Allowed values of UnpackedRecord.flags |
| */ |
| #define UNPACKED_NEED_FREE 0x0001 /* Memory is from sqlite3Malloc() */ |
| #define UNPACKED_NEED_DESTROY 0x0002 /* apMem[]s should all be destroyed */ |
| #define UNPACKED_IGNORE_ROWID 0x0004 /* Ignore trailing rowid on key1 */ |
| #define UNPACKED_INCRKEY 0x0008 /* Make this key an epsilon larger */ |
| #define UNPACKED_PREFIX_MATCH 0x0010 /* A prefix match is considered OK */ |
| #define UNPACKED_PREFIX_SEARCH 0x0020 /* A prefix match is considered OK */ |
| |
| /* |
| ** 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. |
| */ |
| struct Index { |
| char *zName; /* Name of this index */ |
| int nColumn; /* Number of columns in the table used by this index */ |
| int *aiColumn; /* Which columns are used by this index. 1st is 0 */ |
| unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */ |
| Table *pTable; /* The SQL table being indexed */ |
| int tnum; /* Page containing root of this index in database file */ |
| u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ |
| u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */ |
| u8 bUnordered; /* Use this index for == or IN queries only */ |
| 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; /* Array of size Index.nColumn. True==DESC, False==ASC */ |
| char **azColl; /* Array of collation sequence names for index */ |
| IndexSample *aSample; /* Array of SQLITE_INDEX_SAMPLES samples */ |
| }; |
| |
| /* |
| ** Each sample stored in the sqlite_stat2 table is represented in memory |
| ** using a structure of this type. |
| */ |
| struct IndexSample { |
| union { |
| char *z; /* Value if eType is SQLITE_TEXT or SQLITE_BLOB */ |
| double r; /* Value if eType is SQLITE_FLOAT or SQLITE_INTEGER */ |
| } u; |
| u8 eType; /* SQLITE_NULL, SQLITE_INTEGER ... etc. */ |
| u8 nByte; /* Size in byte of text or blob. */ |
| }; |
| |
| /* |
| ** Each token coming out of the lexer is an instance of |
| ** this structure. Tokens are also used as part of an expression. |
| ** |
| ** Note if Token.z==0 then Token.dyn and Token.n are undefined and |
| ** may contain random values. Do not make any assumptions about Token.dyn |
| ** and Token.n when Token.z==0. |
| */ |
| 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.iColumn 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 */ |
| ExprList *pGroupBy; /* The group by clause */ |
| int nSortingColumn; /* Number of columns in the sorting index */ |
| struct AggInfo_col { /* For each column used in source tables */ |
| Table *pTab; /* Source table */ |
| int iTable; /* Cursor number of the source table */ |
| int iColumn; /* Column number within the source table */ |
| int iSorterColumn; /* Column number in the sorting index */ |
| int iMem; /* Memory location that acts as accumulator */ |
| Expr *pExpr; /* The original expression */ |
| } *aCol; |
| int nColumn; /* Number of used entries in aCol[] */ |
| int nColumnAlloc; /* Number of slots allocated for 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 *pExpr; /* 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 */ |
| } *aFunc; |
| int nFunc; /* Number of entries in aFunc[] */ |
| int nFuncAlloc; /* Number of slots allocated for aFunc[] */ |
| }; |
| |
| /* |
| ** 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 32767 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.token contains the text of the SQL literal. If |
| ** the expression is a variable (TK_VARIABLE), then Expr.token contains the |
| ** variable name. Finally, if the expression is an SQL function (TK_FUNCTION), |
| ** then Expr.token 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.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 affinity; /* The affinity of the column or 0 if not a column */ |
| u16 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; /* Function arguments or in "<expr> IN (<expr-list)" */ |
| Select *pSelect; /* Used for sub-selects and "<expr> IN (<select>)" */ |
| } x; |
| CollSeq *pColl; /* The collation type of the column or 0 */ |
| |
| /* 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. |
| *********************************************************************/ |
| |
| int iTable; /* TK_COLUMN: cursor number of table holding column |
| ** TK_REGISTER: register number |
| ** TK_TRIGGER: 1 -> new, 0 -> old */ |
| ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid. |
| ** TK_VARIABLE: variable number (always >= 1). */ |
| i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ |
| i16 iRightJoinTable; /* If EP_FromJoin, the right table of the join */ |
| u8 flags2; /* Second set of flags. EP2_... */ |
| u8 op2; /* If a TK_REGISTER, the original value of Expr.op */ |
| AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ |
| Table *pTab; /* Table for TK_COLUMN expressions. */ |
| #if SQLITE_MAX_EXPR_DEPTH>0 |
| int nHeight; /* Height of the tree headed by this node */ |
| #endif |
| }; |
| |
| /* |
| ** The following are the meanings of bits in the Expr.flags field. |
| */ |
| #define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */ |
| #define EP_Agg 0x0002 /* Contains one or more aggregate functions */ |
| #define EP_Resolved 0x0004 /* IDs have been resolved to COLUMNs */ |
| #define EP_Error 0x0008 /* Expression contains one or more errors */ |
| #define EP_Distinct 0x0010 /* Aggregate function with DISTINCT keyword */ |
| #define EP_VarSelect 0x0020 /* pSelect is correlated, not constant */ |
| #define EP_DblQuoted 0x0040 /* token.z was originally in "..." */ |
| #define EP_InfixFunc 0x0080 /* True for an infix function: LIKE, GLOB, etc */ |
| #define EP_ExpCollate 0x0100 /* Collating sequence specified explicitly */ |
| #define EP_FixedDest 0x0200 /* Result needed in a specific register */ |
| #define EP_IntValue 0x0400 /* Integer value contained in u.iValue */ |
| #define EP_xIsSelect 0x0800 /* x.pSelect is valid (otherwise x.pList is) */ |
| |
| #define EP_Reduced 0x1000 /* Expr struct is EXPR_REDUCEDSIZE bytes only */ |
| #define EP_TokenOnly 0x2000 /* Expr struct is EXPR_TOKENONLYSIZE bytes only */ |
| #define EP_Static 0x4000 /* Held in memory not obtained from malloc() */ |
| |
| /* |
| ** The following are the meanings of bits in the Expr.flags2 field. |
| */ |
| #define EP2_MallocedToken 0x0001 /* Need to sqlite3DbFree() Expr.zToken */ |
| #define EP2_Irreducible 0x0002 /* Cannot EXPRDUP_REDUCE this Expr */ |
| |
| /* |
| ** The pseudo-routine sqlite3ExprSetIrreducible sets the EP2_Irreducible |
| ** flag on an expression structure. This flag is used for VV&A only. The |
| ** routine is implemented as a macro that only works when in debugging mode, |
| ** so as not to burden production code. |
| */ |
| #ifdef SQLITE_DEBUG |
| # define ExprSetIrreducible(X) (X)->flags2 |= EP2_Irreducible |
| #else |
| # define ExprSetIrreducible(X) |
| #endif |
| |
| /* |
| ** These macros can be used to test, set, or clear bits in the |
| ** Expr.flags field. |
| */ |
| #define ExprHasProperty(E,P) (((E)->flags&(P))==(P)) |
| #define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0) |
| #define ExprSetProperty(E,P) (E)->flags|=(P) |
| #define ExprClearProperty(E,P) (E)->flags&=~(P) |
| |
| /* |
| ** 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 */ |
| |
| /* |
| ** 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. |
| */ |
| struct ExprList { |
| int nExpr; /* Number of expressions on the list */ |
| int nAlloc; /* Number of entries allocated below */ |
| int iECursor; /* VDBE Cursor associated with this ExprList */ |
| struct ExprList_item { |
| Expr *pExpr; /* The list of expressions */ |
| char *zName; /* Token associated with this expression */ |
| char *zSpan; /* Original text of the expression */ |
| u8 sortOrder; /* 1 for DESC or 0 for ASC */ |
| u8 done; /* A flag to indicate when processing is finished */ |
| u16 iCol; /* For ORDER BY, column number in result set */ |
| u16 iAlias; /* Index into Parse.aAlias[] for zName */ |
| } *a; /* One entry for each expression */ |
| }; |
| |
| /* |
| ** An instance of this structure is used by the parser to record both |
| ** the parse tree for an expression and the span of input text for an |
| ** expression. |
| */ |
| struct ExprSpan { |
| Expr *pExpr; /* The expression parse tree */ |
| const char *zStart; /* First character of input text */ |
| const char *zEnd; /* One character past the end of input text */ |
| }; |
| |
| /* |
| ** 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 { |
| struct IdList_item { |
| char *zName; /* Name of the identifier */ |
| int idx; /* Index in some Table.aCol[] of a column named zName */ |
| } *a; |
| int nId; /* Number of identifiers on the list */ |
| int nAlloc; /* Number of entries allocated for a[] below */ |
| }; |
| |
| /* |
| ** 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. |
| */ |
| typedef u64 Bitmask; |
| |
| /* |
| ** The number of bits in a Bitmask. "BMS" means "BitMask Size". |
| */ |
| #define BMS ((int)(sizeof(Bitmask)*8)) |
| |
| /* |
| ** 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 { |
| i16 nSrc; /* Number of tables or subqueries in the FROM clause */ |
| i16 nAlloc; /* Number of entries allocated in a[] below */ |
| struct SrcList_item { |
| 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 */ |
| u8 isPopulated; /* Temporary table associated with SELECT is populated */ |
| u8 jointype; /* Type of join between this able and the previous */ |
| u8 notIndexed; /* True if there is a NOT INDEXED clause */ |
| #ifndef SQLITE_OMIT_EXPLAIN |
| u8 iSelectId; /* If pSelect!=0, the id of the sub-select in EQP */ |
| #endif |
| int iCursor; /* The VDBE cursor number used to access this table */ |
| Expr *pOn; /* The ON clause of a join */ |
| IdList *pUsing; /* The USING clause of a join */ |
| Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */ |
| char *zIndex; /* Identifier from "INDEXED BY <zIndex>" clause */ |
| Index *pIndex; /* Index structure corresponding to zIndex, if any */ |
| } a[1]; /* One entry for each identifier on the list */ |
| }; |
| |
| /* |
| ** Permitted values of the SrcList.a.jointype field |
| */ |
| #define JT_INNER 0x0001 /* Any kind of inner or cross join */ |
| #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ |
| #define JT_NATURAL 0x0004 /* True for a "natural" join */ |
| #define JT_LEFT 0x0008 /* Left outer join */ |
| #define JT_RIGHT 0x0010 /* Right outer join */ |
| #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ |
| #define JT_ERROR 0x0040 /* unknown or unsupported join type */ |
| |
| |
| /* |
| ** A WherePlan object holds information that describes a lookup |
| ** strategy. |
| ** |
| ** This object is intended to be opaque outside of the where.c module. |
| ** It is included here only so that that compiler will know how big it |
| ** is. None of the fields in this object should be used outside of |
| ** the where.c module. |
| ** |
| ** Within the union, pIdx is only used when wsFlags&WHERE_INDEXED is true. |
| ** pTerm is only used when wsFlags&WHERE_MULTI_OR is true. And pVtabIdx |
| ** is only used when wsFlags&WHERE_VIRTUALTABLE is true. It is never the |
| ** case that more than one of these conditions is true. |
| */ |
| struct WherePlan { |
| u32 wsFlags; /* WHERE_* flags that describe the strategy */ |
| u32 nEq; /* Number of == constraints */ |
| double nRow; /* Estimated number of rows (for EQP) */ |
| union { |
| Index *pIdx; /* Index when WHERE_INDEXED is true */ |
| struct WhereTerm *pTerm; /* WHERE clause term for OR-search */ |
| sqlite3_index_info *pVtabIdx; /* Virtual table index to use */ |
| } u; |
| }; |
| |
| /* |
| ** For each nested loop in a WHERE clause implementation, the WhereInfo |
| ** structure contains a single instance of this structure. This structure |
| ** is intended to be private the the where.c module and should not be |
| ** access or modified by other modules. |
| ** |
| ** The pIdxInfo field is used to help pick the best index on a |
| ** virtual table. The pIdxInfo pointer contains indexing |
| ** information for the i-th table in the FROM clause before reordering. |
| ** All the pIdxInfo pointers are freed by whereInfoFree() in where.c. |
| ** All other information in the i-th WhereLevel object for the i-th table |
| ** after FROM clause ordering. |
| */ |
| struct WhereLevel { |
| WherePlan plan; /* query plan for this element of the FROM clause */ |
| int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */ |
| int iTabCur; /* The VDBE cursor used to access the table */ |
| int iIdxCur; /* The VDBE cursor used to access pIdx */ |
| int addrBrk; /* Jump here to break out of the loop */ |
| int addrNxt; /* Jump here to start the next IN combination */ |
| int addrCont; /* Jump here to continue with the next loop cycle */ |
| int addrFirst; /* First instruction of interior of the loop */ |
| u8 iFrom; /* Which entry in the FROM clause */ |
| u8 op, p5; /* Opcode and P5 of the opcode that ends the loop */ |
| int p1, p2; /* Operands of the opcode used to ends the loop */ |
| union { /* Information that depends on plan.wsFlags */ |
| struct { |
| int nIn; /* Number of entries in aInLoop[] */ |
| struct InLoop { |
| int iCur; /* The VDBE cursor used by this IN operator */ |
| int addrInTop; /* Top of the IN loop */ |
| } *aInLoop; /* Information about each nested IN operator */ |
| } in; /* Used when plan.wsFlags&WHERE_IN_ABLE */ |
| } u; |
| |
| /* The following field is really not part of the current level. But |
| ** we need a place to cache virtual table index information for each |
| ** virtual table in the FROM clause and the WhereLevel structure is |
| ** a convenient place since there is one WhereLevel for each FROM clause |
| ** element. |
| */ |
| sqlite3_index_info *pIdxInfo; /* Index info for n-th source table */ |
| }; |
| |
| /* |
| ** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin() |
| ** and the WhereInfo.wctrlFlags member. |
| */ |
| #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_DUPLICATES_OK 0x0008 /* Ok to return a row more than once */ |
| #define WHERE_OMIT_OPEN 0x0010 /* Table cursors are already open */ |
| #define WHERE_OMIT_CLOSE 0x0020 /* Omit close of table & index cursors */ |
| #define WHERE_FORCE_TABLE 0x0040 /* Do not use an index-only search */ |
| #define WHERE_ONETABLE_ONLY 0x0080 /* Only code the 1st table in pTabList */ |
| |
| /* |
| ** The WHERE clause processing routine has two halves. The |
| ** first part does the start of the WHERE loop and the second |
| ** half does the tail of the WHERE loop. An instance of |
| ** this structure is returned by the first half and passed |
| ** into the second half to give some continuity. |
| */ |
| struct WhereInfo { |
| Parse *pParse; /* Parsing and code generating context */ |
| u16 wctrlFlags; /* Flags originally passed to sqlite3WhereBegin() */ |
| u8 okOnePass; /* Ok to use one-pass algorithm for UPDATE or DELETE */ |
| u8 untestedTerms; /* Not all WHERE terms resolved by outer loop */ |
| SrcList *pTabList; /* List of tables in the join */ |
| int iTop; /* The very beginning of the WHERE loop */ |
| int iContinue; /* Jump here to continue with next record */ |
| int iBreak; /* Jump here to break out of the loop */ |
| int nLevel; /* Number of nested loop */ |
| struct WhereClause *pWC; /* Decomposition of the WHERE clause */ |
| double savedNQueryLoop; /* pParse->nQueryLoop outside the WHERE loop */ |
| double nRowOut; /* Estimated number of output rows */ |
| WhereLevel a[1]; /* Information about each nest loop in WHERE */ |
| }; |
| |
| /* |
| ** 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 */ |
| ExprList *pEList; /* Optional list of named expressions */ |
| int nRef; /* Number of names resolved by this context */ |
| int nErr; /* Number of errors encountered while resolving names */ |
| u8 allowAgg; /* Aggregate functions allowed here */ |
| u8 hasAgg; /* True if aggregates are seen */ |
| u8 isCheck; /* True if resolving names in a CHECK constraint */ |
| int nDepth; /* Depth of subquery recursion. 1 for no recursion */ |
| AggInfo *pAggInfo; /* Information about aggregates at this level */ |
| NameContext *pNext; /* Next outer name context. NULL for outermost */ |
| }; |
| |
| /* |
| ** An instance of the following structure contains all information |
| ** needed to generate code for a single SELECT statement. |
| ** |
| ** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0. |
| ** If there is a LIMIT clause, the parser sets nLimit to the value of the |
| ** limit and nOffset to the value of the offset (or 0 if there is not |
| ** offset). But later on, nLimit and nOffset become the memory locations |
| ** in the VDBE that record the limit and offset counters. |
| ** |
| ** 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 addrOpenTran[2] contains collating |
| ** sequences for the ORDER BY clause. |
| */ |
| struct Select { |
| ExprList *pEList; /* The fields of the result */ |
| u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ |
| char affinity; /* MakeRecord with this affinity for SRT_Set */ |
| u16 selFlags; /* Various SF_* values */ |
| 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 */ |
| Select *pRightmost; /* Right-most select in a compound select statement */ |
| Expr *pLimit; /* LIMIT expression. NULL means not used. */ |
| Expr *pOffset; /* OFFSET expression. NULL means not used. */ |
| int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ |
| int addrOpenEphm[3]; /* OP_OpenEphem opcodes related to this select */ |
| double nSelectRow; /* Estimated number of result rows */ |
| }; |
| |
| /* |
| ** Allowed values for Select.selFlags. The "SF" prefix stands for |
| ** "Select Flag". |
| */ |
| #define SF_Distinct 0x0001 /* Output should be DISTINCT */ |
| #define SF_Resolved 0x0002 /* Identifiers have been resolved */ |
| #define SF_Aggregate 0x0004 /* Contains aggregate functions */ |
| #define SF_UsesEphemeral 0x0008 /* Uses the OpenEphemeral opcode */ |
| #define SF_Expanded 0x0010 /* sqlite3SelectExpand() called on this */ |
| #define SF_HasTypeInfo 0x0020 /* FROM subqueries have Table metadata */ |
| |
| |
| /* |
| ** The results of a select can be distributed in several ways. The |
| ** "SRT" prefix means "SELECT Result Type". |
| */ |
| #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 */ |
| |
| /* The ORDER BY clause is ignored for all of the above */ |
| #define IgnorableOrderby(X) ((X->eDest)<=SRT_Discard) |
| |
| #define SRT_Output 5 /* Output each row of result */ |
| #define SRT_Mem 6 /* Store result in a memory cell */ |
| #define SRT_Set 7 /* Store results as keys in an index */ |
| #define SRT_Table 8 /* Store result as data with an automatic rowid */ |
| #define SRT_EphemTab 9 /* Create transient tab and store like SRT_Table */ |
| #define SRT_Coroutine 10 /* Generate a single row of result */ |
| |
| /* |
| ** A structure used to customize the behavior of sqlite3Select(). See |
| ** comments above sqlite3Select() for details. |
| */ |
| typedef struct SelectDest SelectDest; |
| struct SelectDest { |
| u8 eDest; /* How to dispose of the results */ |
| u8 affinity; /* Affinity used when eDest==SRT_Set */ |
| int iParm; /* A parameter used by the eDest disposal method */ |
| int iMem; /* Base register where results are written */ |
| int nMem; /* Number of registers allocated */ |
| }; |
| |
| /* |
| ** 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 down 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 */ |
| }; |
| |
| /* |
| ** Size of the column cache |
| */ |
| #ifndef SQLITE_N_COLCACHE |
| # define SQLITE_N_COLCACHE 10 |
| #endif |
| |
| /* |
| ** 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 */ |
| int orconf; /* Default ON CONFLICT policy */ |
| SubProgram *pProgram; /* Program implementing pTrigger/orconf */ |
| u32 aColmask[2]; /* Masks of old.*, new.* columns accessed */ |
| TriggerPrg *pNext; /* Next entry in Parse.pTriggerPrg list */ |
| }; |
| |
| /* |
| ** The yDbMask datatype for the bitmask of all attached databases. |
| */ |
| #if SQLITE_MAX_ATTACHED>30 |
| typedef sqlite3_uint64 yDbMask; |
| #else |
| typedef unsigned int yDbMask; |
| #endif |
| |
| /* |
| ** 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 */ |
| int rc; /* Return code from execution */ |
| char *zErrMsg; /* An error message */ |
| Vdbe *pVdbe; /* An engine for executing database bytecode */ |
| u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ |
| u8 nameClash; /* A permanent table name clashes with temp table name */ |
| u8 checkSchema; /* Causes schema cookie check after an error */ |
| u8 nested; /* Number of nested calls to the parser/code generator */ |
| u8 parseError; /* True after a parsing error. Ticket #1794 */ |
| u8 nTempReg; /* Number of temporary registers in aTempReg[] */ |
| u8 nTempInUse; /* Number of aTempReg[] currently checked out */ |
| int aTempReg[8]; /* Holding area for temporary registers */ |
| 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 nSet; /* Number of sets used so far */ |
| int ckBase; /* Base register of data during check constraints */ |
| int iCacheLevel; /* ColCache valid when aColCache[].iLevel<=iCacheLevel */ |
| int iCacheCnt; /* Counter used to generate aColCache[].lru values */ |
| u8 nColCache; /* Number of entries in the column cache */ |
| u8 iColCache; /* Next entry of the cache to replace */ |
| struct yColCache { |
| int iTable; /* Table cursor number */ |
| int iColumn; /* Table column number */ |
| u8 tempReg; /* iReg is a temp register that needs to be freed */ |
| int iLevel; /* Nesting level */ |
| int iReg; /* Reg with value of this column. 0 means none. */ |
| int lru; /* Least recently used entry has the smallest value */ |
| } aColCache[SQLITE_N_COLCACHE]; /* One for each column cache entry */ |
| yDbMask writeMask; /* Start a write transaction on these databases */ |
| yDbMask cookieMask; /* Bitmask of schema verified databases */ |
| u8 isMultiWrite; /* True if statement may affect/insert multiple rows */ |
| u8 mayAbort; /* True if statement may throw an ABORT exception */ |
| int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */ |
| int cookieValue[SQLITE_MAX_ATTACHED+2]; /* Values of cookies to verify */ |
| #ifndef SQLITE_OMIT_SHARED_CACHE |
| int nTableLock; /* Number of locks in aTableLock */ |
| TableLock *aTableLock; /* Required table locks for shared-cache mode */ |
| #endif |
| int regRowid; /* Register holding rowid of CREATE TABLE entry */ |
| int regRoot; /* Register holding root page number for new objects */ |
| AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */ |
| int nMaxArg; /* Max args passed to user function by sub-program */ |
| |
| /* Information used while coding trigger programs. */ |
| Parse *pToplevel; /* Parse structure for main program (or NULL) */ |
| Table *pTriggerTab; /* Table triggers are being coded for */ |
| u32 oldmask; /* Mask of old.* columns referenced */ |
| u32 newmask; /* Mask of new.* columns referenced */ |
| u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */ |
| u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */ |
| u8 disableTriggers; /* True to disable triggers */ |
| double nQueryLoop; /* Estimated number of iterations of a query */ |
| |
| /* Above is constant between recursions. Below is reset before and after |
| ** each recursion */ |
| |
| int nVar; /* Number of '?' variables seen in the SQL so far */ |
| int nVarExpr; /* Number of used slots in apVarExpr[] */ |
| int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */ |
| Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */ |
| Vdbe *pReprepare; /* VM being reprepared (sqlite3Reprepare()) */ |
| int nAlias; /* Number of aliased result set columns */ |
| int nAliasAlloc; /* Number of allocated slots for aAlias[] */ |
| int *aAlias; /* Register used to hold aliased result */ |
| u8 explain; /* True if the EXPLAIN flag is found on the query */ |
| Token sNameToken; /* Token with unqualified schema object name */ |
| Token sLastToken; /* The last token parsed */ |
| const char *zTail; /* All SQL text past the last semicolon parsed */ |
| Table *pNewTable; /* A table being constructed by CREATE TABLE */ |
| 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 */ |
| u8 declareVtab; /* True if inside sqlite3_declare_vtab() */ |
| int nVtabLock; /* Number of virtual tables to lock */ |
| Table **apVtabLock; /* Pointer to virtual tables needing locking */ |
| #endif |
| int nHeight; /* Expression tree height of current sub-select */ |
| Table *pZombieTab; /* List of Table objects to delete after code gen */ |
| TriggerPrg *pTriggerPrg; /* Linked list of coded triggers */ |
| |
| #ifndef SQLITE_OMIT_EXPLAIN |
| int iSelectId; |
| int iNextSelectId; |
| #endif |
| }; |
| |
| #ifdef SQLITE_OMIT_VIRTUALTABLE |
| #define IN_DECLARE_VTAB 0 |
| #else |
| #define IN_DECLARE_VTAB (pParse->declareVtab) |
| #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 OP_Insert and OP_Delete |
| */ |
| #define OPFLAG_NCHANGE 0x01 /* Set to update db->nChange */ |
| #define OPFLAG_LASTROWID 0x02 /* 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_CLEARCACHE 0x20 /* Clear pseudo-table cache in OP_Column */ |
| |
| /* |
| * 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 */ |
| 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 -> If this is an INSERT INTO ... SELECT ... statement, then |
| * this stores a pointer to the SELECT statement. Otherwise NULL. |
| * target -> A token holding the quoted name of the table to insert into. |
| * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then |
| * this stores values to be inserted. Otherwise NULL. |
| * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... |
| * statement, then this stores the column-names to be |
| * inserted into. |
| * |
| * (op == TK_DELETE) |
| * target -> A token holding the quoted name of the table to delete from. |
| * pWhere -> The WHERE clause of the DELETE statement if one is specified. |
| * Otherwise NULL. |
| * |
| * (op == TK_UPDATE) |
| * target -> A token holding the quoted name of the table to update rows of. |
| * 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. |
| * |
| */ |
| struct TriggerStep { |
| u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */ |
| u8 orconf; /* OE_Rollback etc. */ |
| Trigger *pTrig; /* The trigger that this step is a part of */ |
| Select *pSelect; /* SELECT statment or RHS of INSERT INTO .. SELECT ... */ |
| Token target; /* Target table for DELETE, UPDATE, INSERT */ |
| Expr *pWhere; /* The WHERE clause for DELETE or UPDATE steps */ |
| ExprList *pExprList; /* SET clause for UPDATE. VALUES clause for INSERT */ |
| IdList *pIdList; /* Column names for INSERT */ |
| TriggerStep *pNext; /* Next in the link-list */ |
| TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */ |
| }; |
| |
| /* |
| ** The following structure contains information used by the sqliteFix... |
| ** routines as they walk the parse tree to make database references |
| ** explicit. |
| */ |
| typedef struct DbFixer DbFixer; |
| struct DbFixer { |
| Parse *pParse; /* The parsing context. Error messages written here */ |
| 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 */ |
| }; |
| |
| /* |
| ** 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 StrAccum { |
| sqlite3 *db; /* Optional database for lookaside. Can be NULL */ |
| char *zBase; /* A base allocation. Not from malloc. */ |
| char *zText; /* The string collected so far */ |
| int nChar; /* Length of the string so far */ |
| int nAlloc; /* Amount of space allocated in zText */ |
| int mxAlloc; /* Maximum allowed string length */ |
| u8 mallocFailed; /* Becomes true if any memory allocation fails */ |
| u8 useMalloc; /* 0: none, 1: sqlite3DbMalloc, 2: sqlite3_malloc */ |
| u8 tooBig; /* Becomes true if string size exceeds limits */ |
| }; |
| |
| /* |
| ** 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 */ |
| int iDb; /* 0 for main database. 1 for TEMP, 2.. for ATTACHed */ |
| char **pzErrMsg; /* Error message stored here */ |
| int rc; /* Result code stored here */ |
| } InitData; |
| |
| /* |
| ** 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 */ |
| int bCoreMutex; /* True to enable core mutexing */ |
| int bFullMutex; /* True to enable full mutexing */ |
| int mxStrlen; /* Maximum string length */ |
| int szLookaside; /* Default lookaside buffer size */ |
| int nLookaside; /* Default lookaside buffer count */ |
| sqlite3_mem_methods m; /* Low-level memory allocation interface */ |
| sqlite3_mutex_methods mutex; /* Low-level mutex interface */ |
| sqlite3_pcache_methods pcache; /* Low-level page-cache interface */ |
| void *pHeap; /* Heap storage space */ |
| int nHeap; /* Size of pHeap[] */ |
| int mnReq, mxReq; /* Min and max heap requests sizes */ |
| void *pScratch; /* Scratch memory */ |
| int szScratch; /* Size of each scratch buffer */ |
| int nScratch; /* Number of scratch buffers */ |
| 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 */ |
| /* 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 */ |
| sqlite3_mutex *pInitMutex; /* Mutex used by sqlite3_initialize() */ |
| int nRefInitMutex; /* Number of users of pInitMutex */ |
| void (*xLog)(void*,int,const char*); /* Function for logging */ |
| void *pLogArg; /* First argument to xLog() */ |
| }; |
| |
| /* |
| ** Context pointer passed down through the tree-walk. |
| */ |
| struct Walker { |
| int (*xExprCallback)(Walker*, Expr*); /* Callback for expressions */ |
| int (*xSelectCallback)(Walker*,Select*); /* Callback for SELECTs */ |
| Parse *pParse; /* Parser context. */ |
| union { /* Extra data for callback */ |
| NameContext *pNC; /* Naming context */ |
| int i; /* Integer value */ |
| } u; |
| }; |
| |
| /* Forward declarations */ |
| int sqlite3WalkExpr(Walker*, Expr*); |
| int sqlite3WalkExprList(Walker*, ExprList*); |
| int sqlite3WalkSelect(Walker*, Select*); |
| int sqlite3WalkSelectExpr(Walker*, Select*); |
| int sqlite3WalkSelectFrom(Walker*, Select*); |
| |
| /* |
| ** 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 */ |
| |
| /* |
| ** 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 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__) |
| |
| |
| /* |
| ** FTS4 is really an extension for FTS3. It is enabled using the |
| ** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also all |
| ** the SQLITE_ENABLE_FTS4 macro to serve as an alisse for SQLITE_ENABLE_FTS3. |
| */ |
| #if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3) |
| # define SQLITE_ENABLE_FTS3 |
| #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 CoreServices.h and CoreFoundation.h headers are needed for excluding a |
| ** -journal file from Time Machine backups when its associated database has |
| ** previously been excluded by the client code. |
| */ |
| #if defined(__APPLE__) |
| #include <CoreServices/CoreServices.h> |
| #include <CoreFoundation/CoreFoundation.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)]) |
| #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)) |
| #endif |
| |
| /* |
| ** Internal function prototypes |
| */ |
| int sqlite3StrICmp(const char *, const char *); |
| int sqlite3Strlen30(const char*); |
| #define sqlite3StrNICmp sqlite3_strnicmp |
| |
| int sqlite3MallocInit(void); |
| void sqlite3MallocEnd(void); |
| void *sqlite3Malloc(int); |
| void *sqlite3MallocZero(int); |
| void *sqlite3DbMallocZero(sqlite3*, int); |
| void *sqlite3DbMallocRaw(sqlite3*, int); |
| char *sqlite3DbStrDup(sqlite3*,const char*); |
| char *sqlite3DbStrNDup(sqlite3*,const char*, int); |
| void *sqlite3Realloc(void*, int); |
| void *sqlite3DbReallocOrFree(sqlite3 *, void *, int); |
| void *sqlite3DbRealloc(sqlite3 *, void *, int); |
| void sqlite3DbFree(sqlite3*, void*); |
| int sqlite3MallocSize(void*); |
| int sqlite3DbMallocSize(sqlite3*, void*); |
| void *sqlite3ScratchMalloc(int); |
| void sqlite3ScratchFree(void*); |
| void *sqlite3PageMalloc(int); |
| void sqlite3PageFree(void*); |
| void sqlite3MemSetDefault(void); |
| void sqlite3BenignMallocHooks(void (*)(void), void (*)(void)); |
| 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 |
| |
| #ifdef SQLITE_ENABLE_MEMSYS3 |
| const sqlite3_mem_methods *sqlite3MemGetMemsys3(void); |
| #endif |
| #ifdef SQLITE_ENABLE_MEMSYS5 |
| const sqlite3_mem_methods *sqlite3MemGetMemsys5(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 |
| |
| int sqlite3StatusValue(int); |
| void sqlite3StatusAdd(int, int); |
| void sqlite3StatusSet(int, int); |
| |
| #ifndef SQLITE_OMIT_FLOATING_POINT |
| int sqlite3IsNaN(double); |
| #else |
| # define sqlite3IsNaN(X) 0 |
| #endif |
| |
| void sqlite3VXPrintf(StrAccum*, int, const char*, va_list); |
| #ifndef SQLITE_OMIT_TRACE |
| void sqlite3XPrintf(StrAccum*, const char*, ...); |
| #endif |
| char *sqlite3MPrintf(sqlite3*,const char*, ...); |
| char *sqlite3VMPrintf(sqlite3*,const char*, va_list); |
| char *sqlite3MAppendf(sqlite3*,char*,const char*,...); |
| #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) |
| void sqlite3DebugPrintf(const char*, ...); |
| #endif |
| #if defined(SQLITE_TEST) |
| void *sqlite3TestTextToPtr(const char*); |
| #endif |
| void sqlite3SetString(char **, sqlite3*, const char*, ...); |
| void sqlite3ErrorMsg(Parse*, const char*, ...); |
| int sqlite3Dequote(char*); |
| int sqlite3KeywordCode(const unsigned char*, int); |
| int sqlite3RunParser(Parse*, const char*, char **); |
| void sqlite3FinishCoding(Parse*); |
| int sqlite3GetTempReg(Parse*); |
| void sqlite3ReleaseTempReg(Parse*,int); |
| int sqlite3GetTempRange(Parse*,int); |
| void sqlite3ReleaseTempRange(Parse*,int,int); |
| 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*, const Token*); |
| Expr *sqlite3ExprAnd(sqlite3*,Expr*, Expr*); |
| Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*); |
| void sqlite3ExprAssignVarNumber(Parse*, Expr*); |
| void sqlite3ExprDelete(sqlite3*, Expr*); |
| ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*); |
| void sqlite3ExprListSetName(Parse*,ExprList*,Token*,int); |
| void sqlite3ExprListSetSpan(Parse*,ExprList*,ExprSpan*); |
| void sqlite3ExprListDelete(sqlite3*, ExprList*); |
| int sqlite3Init(sqlite3*, char**); |
| int sqlite3InitCallback(void*, int, char**, char**); |
| void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); |
| void sqlite3ResetInternalSchema(sqlite3*, int); |
| void sqlite3BeginParse(Parse*,int); |
| void sqlite3CommitInternalChanges(sqlite3*); |
| Table *sqlite3ResultSetOfSelect(Parse*,Select*); |
| void sqlite3OpenMasterTable(Parse *, int); |
| void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int); |
| void sqlite3AddColumn(Parse*,Token*); |
| void sqlite3AddNotNull(Parse*, int); |
| void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int); |
| void sqlite3AddCheckConstraint(Parse*, Expr*); |
| void sqlite3AddColumnType(Parse*,Token*); |
| void sqlite3AddDefaultValue(Parse*,ExprSpan*); |
| void sqlite3AddCollateType(Parse*, Token*); |
| void sqlite3EndTable(Parse*,Token*,Token*,Select*); |
| |
| Bitvec *sqlite3BitvecCreate(u32); |
| int sqlite3BitvecTest(Bitvec*, u32); |
| int sqlite3BitvecSet(Bitvec*, u32); |
| void sqlite3BitvecClear(Bitvec*, u32, void*); |
| void sqlite3BitvecDestroy(Bitvec*); |
| u32 sqlite3BitvecSize(Bitvec*); |
| int sqlite3BitvecBuiltinTest(int,int*); |
| |
| RowSet *sqlite3RowSetInit(sqlite3*, void*, unsigned int); |
| void sqlite3RowSetClear(RowSet*); |
| void sqlite3RowSetInsert(RowSet*, i64); |
| int sqlite3RowSetTest(RowSet*, u8 iBatch, i64); |
| int sqlite3RowSetNext(RowSet*, i64*); |
| |
| void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int); |
| |
| #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) |
| int sqlite3ViewGetColumnNames(Parse*,Table*); |
| #else |
| # define sqlite3ViewGetColumnNames(A,B) 0 |
| #endif |
| |
| void sqlite3DropTable(Parse*, SrcList*, int, int); |
| void sqlite3DeleteTable(sqlite3*, Table*); |
| #ifndef SQLITE_OMIT_AUTOINCREMENT |
| void sqlite3AutoincrementBegin(Parse *pParse); |
| void sqlite3AutoincrementEnd(Parse *pParse); |
| #else |
| # define sqlite3AutoincrementBegin(X) |
| # define sqlite3AutoincrementEnd(X) |
| #endif |
| void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int); |
| void *sqlite3ArrayAllocate(sqlite3*,void*,int,int,int*,int*,int*); |
| IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*); |
| int sqlite3IdListIndex(IdList*,const char*); |
| SrcList *sqlite3SrcListEnlarge(sqlite3*, SrcList*, int, int); |
| SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*); |
| SrcList *sqlite3SrcListAppendFromTerm(Parse*, SrcList*, Token*, Token*, |
| Token*, Select*, Expr*, IdList*); |
| void sqlite3SrcListIndexedBy(Parse *, SrcList *, Token *); |
| int sqlite3IndexedByLookup(Parse *, struct SrcList_item *); |
| void sqlite3SrcListShiftJoinType(SrcList*); |
| void sqlite3SrcListAssignCursors(Parse*, SrcList*); |
| void sqlite3IdListDelete(sqlite3*, IdList*); |
| void sqlite3SrcListDelete(sqlite3*, SrcList*); |
| Index *sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, |
| Token*, int, int); |
| void sqlite3DropIndex(Parse*, SrcList*, int); |
| int sqlite3Select(Parse*, Select*, SelectDest*); |
| Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*, |
| Expr*,ExprList*,int,Expr*,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 *, Expr *, char *); |
| #endif |
| void sqlite3DeleteFrom(Parse*, SrcList*, Expr*); |
| void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int); |
| WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u16); |
| void sqlite3WhereEnd(WhereInfo*); |
| int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int); |
| void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int); |
| void sqlite3ExprCodeMove(Parse*, int, int, int); |
| void sqlite3ExprCodeCopy(Parse*, int, int, int); |
| void sqlite3ExprCacheStore(Parse*, int, int, int); |
| void sqlite3ExprCachePush(Parse*); |
| void sqlite3ExprCachePop(Parse*, int); |
| void sqlite3ExprCacheRemove(Parse*, int, int); |
| void sqlite3ExprCacheClear(Parse*); |
| void sqlite3ExprCacheAffinityChange(Parse*, int, int); |
| int sqlite3ExprCode(Parse*, Expr*, int); |
| int sqlite3ExprCodeTemp(Parse*, Expr*, int*); |
| int sqlite3ExprCodeTarget(Parse*, Expr*, int); |
| int sqlite3ExprCodeAndCache(Parse*, Expr*, int); |
| void sqlite3ExprCodeConstants(Parse*, Expr*); |
| int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int); |
| void sqlite3ExprIfTrue(Parse*, Expr*, int, int); |
| void sqlite3ExprIfFalse(Parse*, Expr*, int, int); |
| Table *sqlite3FindTable(sqlite3*,const char*, const char*); |
| Table *sqlite3LocateTable(Parse*,int isView,const char*, const char*); |
| Index *sqlite3FindIndex(sqlite3*,const char*, const char*); |
| void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); |
| void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); |
| void sqlite3Vacuum(Parse*); |
| int sqlite3RunVacuum(char**, sqlite3*); |
| char *sqlite3NameFromToken(sqlite3*, Token*); |
| int sqlite3ExprCompare(Expr*, Expr*); |
| int sqlite3ExprListCompare(ExprList*, ExprList*); |
| void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); |
| void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); |
| Vdbe *sqlite3GetVdbe(Parse*); |
| void sqlite3PrngSaveState(void); |
| void sqlite3PrngRestoreState(void); |
| void sqlite3PrngResetState(void); |
| void sqlite3RollbackAll(sqlite3*); |
| void sqlite3CodeVerifySchema(Parse*, int); |
| void sqlite3CodeVerifyNamedSchema(Parse*, const char *zDb); |
| void sqlite3BeginTransaction(Parse*, int); |
| void sqlite3CommitTransaction(Parse*); |
| void sqlite3RollbackTransaction(Parse*); |
| void sqlite3Savepoint(Parse*, int, Token*); |
| void sqlite3CloseSavepoints(sqlite3 *); |
| int sqlite3ExprIsConstant(Expr*); |
| int sqlite3ExprIsConstantNotJoin(Expr*); |
| int sqlite3ExprIsConstantOrFunction(Expr*); |
| int sqlite3ExprIsInteger(Expr*, int*); |
| int sqlite3ExprCanBeNull(const Expr*); |
| void sqlite3ExprCodeIsNullJump(Vdbe*, const Expr*, int, int); |
| int sqlite3ExprNeedsNoAffinityChange(const Expr*, char); |
| int sqlite3IsRowid(const char*); |
| void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int, Trigger *, int); |
| void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*); |
| int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int); |
| void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int, |
| int*,int,int,int,int,int*); |
| void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*, int, int, int); |
| int sqlite3OpenTableAndIndices(Parse*, Table*, int, int); |
| void sqlite3BeginWriteOperation(Parse*, int, int); |
| void sqlite3MultiWrite(Parse*); |
| void sqlite3MayAbort(Parse*); |
| void sqlite3HaltConstraint(Parse*, int, char*, int); |
| Expr *sqlite3ExprDup(sqlite3*,Expr*,int); |
| ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int); |
| SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int); |
| IdList *sqlite3IdListDup(sqlite3*,IdList*); |
| Select *sqlite3SelectDup(sqlite3*,Select*,int); |
| void sqlite3FuncDefInsert(FuncDefHash*, FuncDef*); |
| FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int); |
| void sqlite3RegisterBuiltinFunctions(sqlite3*); |
| void sqlite3RegisterDateTimeFunctions(void); |
| void sqlite3RegisterGlobalFunctions(void); |
| int sqlite3SafetyCheckOk(sqlite3*); |
| int sqlite3SafetyCheckSickOrOk(sqlite3*); |
| void sqlite3ChangeCookie(Parse*, int); |
| |
| #if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) |
| void sqlite3MaterializeView(Parse*, Table*, 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*); |
| TriggerStep *sqlite3TriggerInsertStep(sqlite3*,Token*, IdList*, |
| ExprList*,Select*,u8); |
| TriggerStep *sqlite3TriggerUpdateStep(sqlite3*,Token*,ExprList*, Expr*, u8); |
| TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*); |
| void sqlite3DeleteTrigger(sqlite3*, Trigger*); |
| void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); |
| u32 sqlite3TriggerColmask(Parse*,Trigger*,ExprList*,int,int,Table*,int); |
| # define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p)) |
| #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 sqlite3TriggerColmask(A,B,C,D,E,F,G) 0 |
| #endif |
| |
| int sqlite3JoinType(Parse*, Token*, Token*, Token*); |
| 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 |
| void sqlite3Attach(Parse*, Expr*, Expr*, Expr*); |
| void sqlite3Detach(Parse*, Expr*); |
| int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); |
| int sqlite3FixSrcList(DbFixer*, SrcList*); |
| int sqlite3FixSelect(DbFixer*, Select*); |
| int sqlite3FixExpr(DbFixer*, Expr*); |
| int sqlite3FixExprList(DbFixer*, ExprList*); |
| int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); |
| int sqlite3AtoF(const char *z, double*, int, u8); |
| int sqlite3GetInt32(const char *, int*); |
| int sqlite3Atoi(const char*); |
| int sqlite3Utf16ByteLen(const void *pData, int nChar); |
| int sqlite3Utf8CharLen(const char *pData, int nByte); |
| int sqlite3Utf8Read(const u8*, const u8**); |
| |
| /* |
| ** 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. Code should use the MACRO forms below, as the Varint32 versions |
| ** are coded to assume the single byte case is already handled (which |
| ** the MACRO form does). |
| */ |
| int sqlite3PutVarint(unsigned char*, u64); |
| int sqlite3PutVarint32(unsigned char*, u32); |
| u8 sqlite3GetVarint(const unsigned char *, u64 *); |
| u8 sqlite3GetVarint32(const unsigned char *, u32 *); |
| int sqlite3VarintLen(u64 v); |
| |
| /* |
| ** The header of a record consists of a sequence variable-length integers. |
| ** These integers are almost always small and are encoded as a single byte. |
| ** The following macros take advantage this fact to provide a fast encode |
| ** and decode of the integers in a record header. It is faster for the common |
| ** case where the integer is a single byte. It is a little slower when the |
| ** integer is two or more bytes. But overall it is faster. |
| ** |
| ** The following expressions are equivalent: |
| ** |
| ** x = sqlite3GetVarint32( A, &B ); |
| ** x = sqlite3PutVarint32( A, B ); |
| ** |
| ** x = getVarint32( A, B ); |
| ** x = putVarint32( A, B ); |
| ** |
| */ |
| #define getVarint32(A,B) (u8)((*(A)<(u8)0x80) ? ((B) = (u32)*(A)),1 : sqlite3GetVarint32((A), (u32 *)&(B))) |
| #define putVarint32(A,B) (u8)(((u32)(B)<(u32)0x80) ? (*(A) = (unsigned char)(B)),1 : sqlite3PutVarint32((A), (B))) |
| #define getVarint sqlite3GetVarint |
| #define putVarint sqlite3PutVarint |
| |
| |
| const char *sqlite3IndexAffinityStr(Vdbe *, Index *); |
| void sqlite3TableAffinityStr(Vdbe *, Table *); |
| char sqlite3CompareAffinity(Expr *pExpr, char aff2); |
| int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity); |
| char sqlite3ExprAffinity(Expr *pExpr); |
| int sqlite3Atoi64(const char*, i64*, int, u8); |
| void sqlite3Error(sqlite3*, int, const char*,...); |
| void *sqlite3HexToBlob(sqlite3*, const char *z, int n); |
| int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); |
| const char *sqlite3ErrStr(int); |
| int sqlite3ReadSchema(Parse *pParse); |
| CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char*,int); |
| CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char*zName); |
| CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr); |
| Expr *sqlite3ExprSetColl(Expr*, CollSeq*); |
| Expr *sqlite3ExprSetCollByToken(Parse *pParse, Expr*, Token*); |
| int sqlite3CheckCollSeq(Parse *, CollSeq *); |
| int sqlite3CheckObjectName(Parse *, const char *); |
| void sqlite3VdbeSetChanges(sqlite3 *, int); |
| int sqlite3AddInt64(i64*,i64); |
| int sqlite3SubInt64(i64*,i64); |
| int sqlite3MulInt64(i64*,i64); |
| int sqlite3AbsInt32(int); |
| |
| const void *sqlite3ValueText(sqlite3_value*, u8); |
| int sqlite3ValueBytes(sqlite3_value*, u8); |
| void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, |
| void(*)(void*)); |
| void sqlite3ValueFree(sqlite3_value*); |
| sqlite3_value *sqlite3ValueNew(sqlite3 *); |
| char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8); |
| #ifdef SQLITE_ENABLE_STAT2 |
| char *sqlite3Utf8to16(sqlite3 *, u8, char *, int, int *); |
| #endif |
| int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **); |
| void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); |
| #ifndef SQLITE_AMALGAMATION |
| extern const unsigned char sqlite3OpcodeProperty[]; |
| extern const unsigned char sqlite3UpperToLower[]; |
| extern const unsigned char sqlite3CtypeMap[]; |
| extern const Token sqlite3IntTokens[]; |
| extern SQLITE_WSD struct Sqlite3Config sqlite3Config; |
| extern SQLITE_WSD FuncDefHash sqlite3GlobalFunctions; |
| #ifndef SQLITE_OMIT_WSD |
| extern int sqlite3PendingByte; |
| #endif |
| #endif |
| void sqlite3RootPageMoved(sqlite3*, int, int, int); |
| void sqlite3Reindex(Parse*, Token*, Token*); |
| void sqlite3AlterFunctions(void); |
| void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); |
| int sqlite3GetToken(const unsigned char *, int *); |
| void sqlite3NestedParse(Parse*, const char*, ...); |
| void sqlite3ExpirePreparedStatements(sqlite3*); |
| int sqlite3CodeSubselect(Parse *, Expr *, int, int); |
| void sqlite3SelectPrep(Parse*, Select*, NameContext*); |
| int sqlite3ResolveExprNames(NameContext*, Expr*); |
| void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*); |
| int sqlite3ResolveOrderGroupBy(Parse*, Select*, ExprList*, const char*); |
| void sqlite3ColumnDefault(Vdbe *, Table *, int, int); |
| void sqlite3AlterFinishAddColumn(Parse *, Token *); |
| void sqlite3AlterBeginAddColumn(Parse *, SrcList *); |
| CollSeq *sqlite3GetCollSeq(sqlite3*, u8, CollSeq *, const char*); |
| char sqlite3AffinityType(const char*); |
| 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 sqlite3MinimumFileFormat(Parse*, int, int); |
| void sqlite3SchemaClear(void *); |
| Schema *sqlite3SchemaGet(sqlite3 *, Btree *); |
| int sqlite3SchemaToIndex(sqlite3 *db, Schema *); |
| KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *); |
| int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, |
| void (*)(sqlite3_context*,int,sqlite3_value **), |
| void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*), |
| FuncDestructor *pDestructor |
| ); |
| int sqlite3ApiExit(sqlite3 *db, int); |
| int sqlite3OpenTempDatabase(Parse *); |
| |
| void sqlite3StrAccumInit(StrAccum*, char*, int, int); |
| void sqlite3StrAccumAppend(StrAccum*,const char*,int); |
| char *sqlite3StrAccumFinish(StrAccum*); |
| void sqlite3StrAccumReset(StrAccum*); |
| void sqlite3SelectDestInit(SelectDest*,int,int); |
| Expr *sqlite3CreateColumnExpr(sqlite3 *, SrcList *, int, int); |
| |
| void sqlite3BackupRestart(sqlite3_backup *); |
| void sqlite3BackupUpdate(sqlite3_backup *, Pgno, const u8 *); |
| |
| /* |
| ** The interface to the LEMON-generated parser |
| */ |
| void *sqlite3ParserAlloc(void*(*)(size_t)); |
| void sqlite3ParserFree(void*, void(*)(void*)); |
| void sqlite3Parser(void*, int, Token, Parse*); |
| #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, int, 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(Y) |
| # define sqlite3VtabSync(X,Y) SQLITE_OK |
| # define sqlite3VtabRollback(X) |
| # define sqlite3VtabCommit(X) |
| # define sqlite3VtabInSync(db) 0 |
| # define sqlite3VtabLock(X) |
| # define sqlite3VtabUnlock(X) |
| # define sqlite3VtabUnlockList(X) |
| #else |
| void sqlite3VtabClear(sqlite3 *db, Table*); |
| int sqlite3VtabSync(sqlite3 *db, char **); |
| int sqlite3VtabRollback(sqlite3 *db); |
| int sqlite3VtabCommit(sqlite3 *db); |
| void sqlite3VtabLock(VTable *); |
| void sqlite3VtabUnlock(VTable *); |
| void sqlite3VtabUnlockList(sqlite3*); |
| # define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0) |
| #endif |
| void sqlite3VtabMakeWritable(Parse*,Table*); |
| void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*); |
| 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*); |
| void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**); |
| int sqlite3VdbeParameterIndex(Vdbe*, const char*, int); |
| int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *); |
| int sqlite3Reprepare(Vdbe*); |
| void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*); |
| CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *); |
| int sqlite3TempInMemory(const sqlite3*); |
| VTable *sqlite3GetVTable(sqlite3*, Table*); |
| const char *sqlite3JournalModename(int); |
| int sqlite3Checkpoint(sqlite3*, int, int, int*, int*); |
| int sqlite3WalDefaultHook(void*,sqlite3*,const char*,int); |
| |
| /* 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); |
| void sqlite3FkDropTable(Parse*, SrcList *, Table*); |
| void sqlite3FkActions(Parse*, Table*, ExprList*, int); |
| int sqlite3FkRequired(Parse*, Table*, int*, int); |
| u32 sqlite3FkOldmask(Parse*, Table*); |
| FKey *sqlite3FkReferences(Table *); |
| #else |
| #define sqlite3FkActions(a,b,c,d) |
| #define sqlite3FkCheck(a,b,c,d) |
| #define sqlite3FkDropTable(a,b,c) |
| #define sqlite3FkOldmask(a,b) 0 |
| #define sqlite3FkRequired(a,b,c,d) 0 |
| #endif |
| #ifndef SQLITE_OMIT_FOREIGN_KEY |
| void sqlite3FkDelete(sqlite3 *, Table*); |
| #else |
| #define sqlite3FkDelete(a,b) |
| #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_OMIT_BUILTIN_TEST |
| ** is not defined. |
| */ |
| #ifndef SQLITE_OMIT_BUILTIN_TEST |
| void sqlite3BeginBenignMalloc(void); |
| void sqlite3EndBenignMalloc(void); |
| #else |
| #define sqlite3BeginBenignMalloc() |
| #define sqlite3EndBenignMalloc() |
| #endif |
| |
| #define IN_INDEX_ROWID 1 |
| #define IN_INDEX_EPH 2 |
| #define IN_INDEX_INDEX 3 |
| int sqlite3FindInIndex(Parse *, Expr *, int*); |
| |
| #ifdef SQLITE_ENABLE_ATOMIC_WRITE |
| int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); |
| int sqlite3JournalSize(sqlite3_vfs *); |
| int sqlite3JournalCreate(sqlite3_file *); |
| #else |
| #define sqlite3JournalSize(pVfs) ((pVfs)->szOsFile) |
| #endif |
| |
| void sqlite3MemJournalOpen(sqlite3_file *); |
| int sqlite3MemJournalSize(void); |
| int sqlite3IsMemJournal(sqlite3_file *); |
| |
| #if SQLITE_MAX_EXPR_DEPTH>0 |
| void sqlite3ExprSetHeight(Parse *pParse, Expr *p); |
| int sqlite3SelectExprHeight(Select *); |
| int sqlite3ExprCheckHeight(Parse*, int); |
| #else |
| #define sqlite3ExprSetHeight(x,y) |
| #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 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_EXTERN void (*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(void*,u8); |
| int sqlite3MemdebugNoType(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 /* Might have been lookaside memory */ |
| #define MEMTYPE_SCRATCH 0x04 /* Scratch allocations */ |
| #define MEMTYPE_PCACHE 0x08 /* Page cache allocations */ |
| #define MEMTYPE_DB 0x10 /* Uses sqlite3DbMalloc, not sqlite_malloc */ |
| |
| #endif /* _SQLITEINT_H_ */ |