| # 2006 January 31 |
| # |
| # 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. |
| # |
| #*********************************************************************** |
| # This file implements regression tests for SQLite library. The |
| # focus of this file is testing the join reordering optimization |
| # in cases that include a LEFT JOIN. |
| # |
| # $Id: where3.test,v 1.4 2008/04/17 19:14:02 drh Exp $ |
| |
| set testdir [file dirname $argv0] |
| source $testdir/tester.tcl |
| |
| # The following is from ticket #1652. |
| # |
| # A comma join then a left outer join: A,B left join C. |
| # Arrange indices so that the B table is chosen to go first. |
| # Also put an index on C, but make sure that A is chosen before C. |
| # |
| do_test where3-1.1 { |
| execsql { |
| CREATE TABLE t1(a, b); |
| CREATE TABLE t2(p, q); |
| CREATE TABLE t3(x, y); |
| |
| INSERT INTO t1 VALUES(111,'one'); |
| INSERT INTO t1 VALUES(222,'two'); |
| INSERT INTO t1 VALUES(333,'three'); |
| |
| INSERT INTO t2 VALUES(1,111); |
| INSERT INTO t2 VALUES(2,222); |
| INSERT INTO t2 VALUES(4,444); |
| CREATE INDEX t2i1 ON t2(p); |
| |
| INSERT INTO t3 VALUES(999,'nine'); |
| CREATE INDEX t3i1 ON t3(x); |
| |
| SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x WHERE p=2 AND a=q; |
| } |
| } {222 two 2 222 {} {}} |
| |
| ifcapable explain { |
| do_test where3-1.1.1 { |
| explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x |
| WHERE p=2 AND a=q} |
| } [explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON x=q |
| WHERE p=2 AND a=q}] |
| } |
| |
| # Ticket #1830 |
| # |
| # This is similar to the above but with the LEFT JOIN on the |
| # other side. |
| # |
| do_test where3-1.2 { |
| execsql { |
| CREATE TABLE parent1(parent1key, child1key, Child2key, child3key); |
| CREATE TABLE child1 ( child1key NVARCHAR, value NVARCHAR ); |
| CREATE UNIQUE INDEX PKIDXChild1 ON child1 ( child1key ); |
| CREATE TABLE child2 ( child2key NVARCHAR, value NVARCHAR ); |
| |
| INSERT INTO parent1(parent1key,child1key,child2key) |
| VALUES ( 1, 'C1.1', 'C2.1' ); |
| INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.1', 'Value for C1.1' ); |
| INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.1', 'Value for C2.1' ); |
| |
| INSERT INTO parent1 ( parent1key, child1key, child2key ) |
| VALUES ( 2, 'C1.2', 'C2.2' ); |
| INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.2', 'Value for C2.2' ); |
| |
| INSERT INTO parent1 ( parent1key, child1key, child2key ) |
| VALUES ( 3, 'C1.3', 'C2.3' ); |
| INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.3', 'Value for C1.3' ); |
| INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.3', 'Value for C2.3' ); |
| |
| SELECT parent1.parent1key, child1.value, child2.value |
| FROM parent1 |
| LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key |
| INNER JOIN child2 ON child2.child2key = parent1.child2key; |
| } |
| } {1 {Value for C1.1} {Value for C2.1} 2 {} {Value for C2.2} 3 {Value for C1.3} {Value for C2.3}} |
| |
| ifcapable explain { |
| do_test where3-1.2.1 { |
| explain_no_trace { |
| SELECT parent1.parent1key, child1.value, child2.value |
| FROM parent1 |
| LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key |
| INNER JOIN child2 ON child2.child2key = parent1.child2key; |
| } |
| } [explain_no_trace { |
| SELECT parent1.parent1key, child1.value, child2.value |
| FROM parent1 |
| LEFT OUTER JOIN child1 ON parent1.child1key = child1.child1key |
| INNER JOIN child2 ON child2.child2key = parent1.child2key; |
| }] |
| } |
| |
| # This procedure executes the SQL. Then it appends |
| # the ::sqlite_query_plan variable. |
| # |
| proc queryplan {sql} { |
| set ::sqlite_sort_count 0 |
| set data [execsql $sql] |
| return [concat $data $::sqlite_query_plan] |
| } |
| |
| |
| # If you have a from clause of the form: A B C left join D |
| # then make sure the query optimizer is able to reorder the |
| # A B C part anyway it wants. |
| # |
| # Following the fix to ticket #1652, there was a time when |
| # the C table would not reorder. So the following reorderings |
| # were possible: |
| # |
| # A B C left join D |
| # B A C left join D |
| # |
| # But these reorders were not allowed |
| # |
| # C A B left join D |
| # A C B left join D |
| # C B A left join D |
| # B C A left join D |
| # |
| # The following tests are here to verify that the latter four |
| # reorderings are allowed again. |
| # |
| do_test where3-2.1 { |
| execsql { |
| CREATE TABLE tA(apk integer primary key, ax); |
| CREATE TABLE tB(bpk integer primary key, bx); |
| CREATE TABLE tC(cpk integer primary key, cx); |
| CREATE TABLE tD(dpk integer primary key, dx); |
| } |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE cpk=bx AND bpk=ax |
| } |
| } {tA {} tB * tC * tD *} |
| do_test where3-2.1.1 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk |
| WHERE cpk=bx AND bpk=ax |
| } |
| } {tA {} tB * tC * tD *} |
| do_test where3-2.1.2 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk |
| WHERE bx=cpk AND bpk=ax |
| } |
| } {tA {} tB * tC * tD *} |
| do_test where3-2.1.3 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk |
| WHERE bx=cpk AND ax=bpk |
| } |
| } {tA {} tB * tC * tD *} |
| do_test where3-2.1.4 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE bx=cpk AND ax=bpk |
| } |
| } {tA {} tB * tC * tD *} |
| do_test where3-2.1.5 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE cpk=bx AND ax=bpk |
| } |
| } {tA {} tB * tC * tD *} |
| do_test where3-2.2 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE cpk=bx AND apk=bx |
| } |
| } {tB {} tA * tC * tD *} |
| do_test where3-2.3 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE cpk=bx AND apk=bx |
| } |
| } {tB {} tA * tC * tD *} |
| do_test where3-2.4 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE apk=cx AND bpk=ax |
| } |
| } {tC {} tA * tB * tD *} |
| do_test where3-2.5 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE cpk=ax AND bpk=cx |
| } |
| } {tA {} tC * tB * tD *} |
| do_test where3-2.6 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE bpk=cx AND apk=bx |
| } |
| } {tC {} tB * tA * tD *} |
| do_test where3-2.7 { |
| queryplan { |
| SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
| WHERE cpk=bx AND apk=cx |
| } |
| } {tB {} tC * tA * tD *} |
| |
| # Ticket [13f033c865f878953] |
| # If the outer loop must be a full table scan, do not let ANALYZE trick |
| # the planner into use a table for the outer loop that might be indexable |
| # if held until an inner loop. |
| # |
| do_execsql_test where3-3.0 { |
| CREATE TABLE t301(a INTEGER PRIMARY KEY,b,c); |
| CREATE INDEX t301c ON t301(c); |
| INSERT INTO t301 VALUES(1,2,3); |
| CREATE TABLE t302(x, y); |
| INSERT INTO t302 VALUES(4,5); |
| ANALYZE; |
| explain query plan SELECT * FROM t302, t301 WHERE t302.x=5 AND t301.a=t302.y; |
| } { |
| 0 0 0 {SCAN TABLE t302 (~1 rows)} |
| 0 1 1 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
| } |
| do_execsql_test where3-3.1 { |
| explain query plan |
| SELECT * FROM t301, t302 WHERE t302.x=5 AND t301.a=t302.y; |
| } { |
| 0 0 1 {SCAN TABLE t302 (~1 rows)} |
| 0 1 0 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
| } |
| |
| # Verify that when there are multiple tables in a join which must be |
| # full table scans that the query planner attempts put the table with |
| # the fewest number of output rows as the outer loop. |
| # |
| do_execsql_test where3-4.0 { |
| CREATE TABLE t400(a INTEGER PRIMARY KEY, b, c); |
| CREATE TABLE t401(p INTEGER PRIMARY KEY, q, r); |
| CREATE TABLE t402(x INTEGER PRIMARY KEY, y, z); |
| EXPLAIN QUERY PLAN |
| SELECT * FROM t400, t401, t402 WHERE t402.z GLOB 'abc*'; |
| } { |
| 0 0 2 {SCAN TABLE t402 (~500000 rows)} |
| 0 1 0 {SCAN TABLE t400 (~1000000 rows)} |
| 0 2 1 {SCAN TABLE t401 (~1000000 rows)} |
| } |
| do_execsql_test where3-4.1 { |
| EXPLAIN QUERY PLAN |
| SELECT * FROM t400, t401, t402 WHERE t401.r GLOB 'abc*'; |
| } { |
| 0 0 1 {SCAN TABLE t401 (~500000 rows)} |
| 0 1 0 {SCAN TABLE t400 (~1000000 rows)} |
| 0 2 2 {SCAN TABLE t402 (~1000000 rows)} |
| } |
| do_execsql_test where3-4.2 { |
| EXPLAIN QUERY PLAN |
| SELECT * FROM t400, t401, t402 WHERE t400.c GLOB 'abc*'; |
| } { |
| 0 0 0 {SCAN TABLE t400 (~500000 rows)} |
| 0 1 1 {SCAN TABLE t401 (~1000000 rows)} |
| 0 2 2 {SCAN TABLE t402 (~1000000 rows)} |
| } |
| |
| # Verify that a performance regression encountered by firefox |
| # has been fixed. |
| # |
| do_execsql_test where3-5.0 { |
| CREATE TABLE aaa (id INTEGER PRIMARY KEY, type INTEGER, |
| fk INTEGER DEFAULT NULL, parent INTEGER, |
| position INTEGER, title LONGVARCHAR, |
| keyword_id INTEGER, folder_type TEXT, |
| dateAdded INTEGER, lastModified INTEGER); |
| CREATE INDEX aaa_111 ON aaa (fk, type); |
| CREATE INDEX aaa_222 ON aaa (parent, position); |
| CREATE INDEX aaa_333 ON aaa (fk, lastModified); |
| CREATE TABLE bbb (id INTEGER PRIMARY KEY, type INTEGER, |
| fk INTEGER DEFAULT NULL, parent INTEGER, |
| position INTEGER, title LONGVARCHAR, |
| keyword_id INTEGER, folder_type TEXT, |
| dateAdded INTEGER, lastModified INTEGER); |
| CREATE INDEX bbb_111 ON bbb (fk, type); |
| CREATE INDEX bbb_222 ON bbb (parent, position); |
| CREATE INDEX bbb_333 ON bbb (fk, lastModified); |
| |
| EXPLAIN QUERY PLAN |
| SELECT bbb.title AS tag_title |
| FROM aaa JOIN bbb ON bbb.id = aaa.parent |
| WHERE aaa.fk = 'constant' |
| AND LENGTH(bbb.title) > 0 |
| AND bbb.parent = 4 |
| ORDER BY bbb.title COLLATE NOCASE ASC; |
| } { |
| 0 0 0 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)} |
| 0 1 1 {SEARCH TABLE bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
| 0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
| } |
| do_execsql_test where3-5.1 { |
| EXPLAIN QUERY PLAN |
| SELECT bbb.title AS tag_title |
| FROM aaa JOIN aaa AS bbb ON bbb.id = aaa.parent |
| WHERE aaa.fk = 'constant' |
| AND LENGTH(bbb.title) > 0 |
| AND bbb.parent = 4 |
| ORDER BY bbb.title COLLATE NOCASE ASC; |
| } { |
| 0 0 0 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)} |
| 0 1 1 {SEARCH TABLE aaa AS bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
| 0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
| } |
| do_execsql_test where3-5.2 { |
| EXPLAIN QUERY PLAN |
| SELECT bbb.title AS tag_title |
| FROM bbb JOIN aaa ON bbb.id = aaa.parent |
| WHERE aaa.fk = 'constant' |
| AND LENGTH(bbb.title) > 0 |
| AND bbb.parent = 4 |
| ORDER BY bbb.title COLLATE NOCASE ASC; |
| } { |
| 0 0 1 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)} |
| 0 1 0 {SEARCH TABLE bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
| 0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
| } |
| do_execsql_test where3-5.3 { |
| EXPLAIN QUERY PLAN |
| SELECT bbb.title AS tag_title |
| FROM aaa AS bbb JOIN aaa ON bbb.id = aaa.parent |
| WHERE aaa.fk = 'constant' |
| AND LENGTH(bbb.title) > 0 |
| AND bbb.parent = 4 |
| ORDER BY bbb.title COLLATE NOCASE ASC; |
| } { |
| 0 0 1 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)} |
| 0 1 0 {SEARCH TABLE aaa AS bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
| 0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
| } |
| |
| finish_test |