1 # 2005 September 19 2 # 3 # The author disclaims copyright to this source code. In place of 4 # a legal notice, here is a blessing: 5 # 6 # May you do good and not evil. 7 # May you find forgiveness for yourself and forgive others. 8 # May you share freely, never taking more than you give. 9 # 10 #*********************************************************************** 11 # This file implements regression tests for SQLite library. 12 # 13 # This file implements tests for left outer joins containing ON 14 # clauses that restrict the scope of the left term of the join. 15 # 16 # $Id: join5.test,v 1.2 2007/06/08 00:20:48 drh Exp $ 17 18 set testdir [file dirname $argv0] 19 source $testdir/tester.tcl 20 21 22 do_test join5-1.1 { 23 execsql { 24 BEGIN; 25 CREATE TABLE t1(a integer primary key, b integer, c integer); 26 CREATE TABLE t2(x integer primary key, y); 27 CREATE TABLE t3(p integer primary key, q); 28 INSERT INTO t3 VALUES(11,'t3-11'); 29 INSERT INTO t3 VALUES(12,'t3-12'); 30 INSERT INTO t2 VALUES(11,'t2-11'); 31 INSERT INTO t2 VALUES(12,'t2-12'); 32 INSERT INTO t1 VALUES(1, 5, 0); 33 INSERT INTO t1 VALUES(2, 11, 2); 34 INSERT INTO t1 VALUES(3, 12, 1); 35 COMMIT; 36 } 37 } {} 38 do_test join5-1.2 { 39 execsql { 40 select * from t1 left join t2 on t1.b=t2.x and t1.c=1 41 } 42 } {1 5 0 {} {} 2 11 2 {} {} 3 12 1 12 t2-12} 43 do_test join5-1.3 { 44 execsql { 45 select * from t1 left join t2 on t1.b=t2.x where t1.c=1 46 } 47 } {3 12 1 12 t2-12} 48 do_test join5-1.4 { 49 execsql { 50 select * from t1 left join t2 on t1.b=t2.x and t1.c=1 51 left join t3 on t1.b=t3.p and t1.c=2 52 } 53 } {1 5 0 {} {} {} {} 2 11 2 {} {} 11 t3-11 3 12 1 12 t2-12 {} {}} 54 do_test join5-1.5 { 55 execsql { 56 select * from t1 left join t2 on t1.b=t2.x and t1.c=1 57 left join t3 on t1.b=t3.p where t1.c=2 58 } 59 } {2 11 2 {} {} 11 t3-11} 60 61 # Ticket #2403 62 # 63 do_test join5-2.1 { 64 execsql { 65 CREATE TABLE ab(a,b); 66 INSERT INTO "ab" VALUES(1,2); 67 INSERT INTO "ab" VALUES(3,NULL); 68 69 CREATE TABLE xy(x,y); 70 INSERT INTO "xy" VALUES(2,3); 71 INSERT INTO "xy" VALUES(NULL,1); 72 } 73 execsql {SELECT * FROM xy LEFT JOIN ab ON 0} 74 } {2 3 {} {} {} 1 {} {}} 75 do_test join5-2.2 { 76 execsql {SELECT * FROM xy LEFT JOIN ab ON 1} 77 } {2 3 1 2 2 3 3 {} {} 1 1 2 {} 1 3 {}} 78 do_test join5-2.3 { 79 execsql {SELECT * FROM xy LEFT JOIN ab ON NULL} 80 } {2 3 {} {} {} 1 {} {}} 81 do_test join5-2.4 { 82 execsql {SELECT * FROM xy LEFT JOIN ab ON 0 WHERE 0} 83 } {} 84 do_test join5-2.5 { 85 execsql {SELECT * FROM xy LEFT JOIN ab ON 1 WHERE 0} 86 } {} 87 do_test join5-2.6 { 88 execsql {SELECT * FROM xy LEFT JOIN ab ON NULL WHERE 0} 89 } {} 90 do_test join5-2.7 { 91 execsql {SELECT * FROM xy LEFT JOIN ab ON 0 WHERE 1} 92 } {2 3 {} {} {} 1 {} {}} 93 do_test join5-2.8 { 94 execsql {SELECT * FROM xy LEFT JOIN ab ON 1 WHERE 1} 95 } {2 3 1 2 2 3 3 {} {} 1 1 2 {} 1 3 {}} 96 do_test join5-2.9 { 97 execsql {SELECT * FROM xy LEFT JOIN ab ON NULL WHERE 1} 98 } {2 3 {} {} {} 1 {} {}} 99 do_test join5-2.10 { 100 execsql {SELECT * FROM xy LEFT JOIN ab ON 0 WHERE NULL} 101 } {} 102 do_test join5-2.11 { 103 execsql {SELECT * FROM xy LEFT JOIN ab ON 1 WHERE NULL} 104 } {} 105 do_test join5-2.12 { 106 execsql {SELECT * FROM xy LEFT JOIN ab ON NULL WHERE NULL} 107 } {} 108 109 110 finish_test 111
