1 # 2007 Sep 12 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 # 12 # This file is to test that ticket #2640 has been fixed. 13 # 14 # $Id: tkt2640.test,v 1.3 2008/08/04 03:51:24 danielk1977 Exp $ 15 # 16 17 # The problem in ticket #2640 was that the query optimizer was 18 # not recognizing all uses of tables within subqueries in the 19 # WHERE clause. If the subquery contained a compound SELECT, 20 # then tables that were used by terms of the compound other than 21 # the last term would not be recognized as dependencies. 22 # So if one of the SELECT statements within a compound made 23 # use of a table that occurs later in a join, the query 24 # optimizer would not recognize this and would try to evaluate 25 # the subquery too early, before that tables value had been 26 # established. 27 28 set testdir [file dirname $argv0] 29 source $testdir/tester.tcl 30 31 ifcapable !subquery||!compound { 32 finish_test 33 return 34 } 35 36 do_test tkt2640-1.1 { 37 execsql { 38 CREATE TABLE persons(person_id, name); 39 INSERT INTO persons VALUES(1,'fred'); 40 INSERT INTO persons VALUES(2,'barney'); 41 INSERT INTO persons VALUES(3,'wilma'); 42 INSERT INTO persons VALUES(4,'pebbles'); 43 INSERT INTO persons VALUES(5,'bambam'); 44 CREATE TABLE directors(person_id); 45 INSERT INTO directors VALUES(5); 46 INSERT INTO directors VALUES(3); 47 CREATE TABLE writers(person_id); 48 INSERT INTO writers VALUES(2); 49 INSERT INTO writers VALUES(3); 50 INSERT INTO writers VALUES(4); 51 SELECT DISTINCT p.name 52 FROM persons p, directors d 53 WHERE d.person_id=p.person_id 54 AND NOT EXISTS ( 55 SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id 56 EXCEPT 57 SELECT person_id FROM writers w 58 ); 59 } 60 } {wilma} 61 do_test tkt2640-1.2 { 62 execsql { 63 SELECT DISTINCT p.name 64 FROM persons p CROSS JOIN directors d 65 WHERE d.person_id=p.person_id 66 AND NOT EXISTS ( 67 SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id 68 EXCEPT 69 SELECT person_id FROM writers w 70 ); 71 } 72 } {wilma} 73 do_test tkt2640-1.3 { 74 execsql { 75 SELECT DISTINCT p.name 76 FROM directors d CROSS JOIN persons p 77 WHERE d.person_id=p.person_id 78 AND NOT EXISTS ( 79 SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id 80 EXCEPT 81 SELECT person_id FROM writers w 82 ); 83 } 84 } {wilma} 85 do_test tkt2640-1.4 { 86 execsql { 87 SELECT DISTINCT p.name 88 FROM persons p, directors d 89 WHERE d.person_id=p.person_id 90 AND NOT EXISTS ( 91 SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id 92 EXCEPT 93 SELECT person_id FROM writers w 94 ); 95 } 96 } {wilma} 97 do_test tkt2640-1.5 { 98 execsql { 99 SELECT DISTINCT p.name 100 FROM persons p CROSS JOIN directors d 101 WHERE d.person_id=p.person_id 102 AND NOT EXISTS ( 103 SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id 104 EXCEPT 105 SELECT person_id FROM writers w 106 ); 107 } 108 } {wilma} 109 do_test tkt2640-1.6 { 110 execsql { 111 SELECT DISTINCT p.name 112 FROM directors d CROSS JOIN persons p 113 WHERE d.person_id=p.person_id 114 AND NOT EXISTS ( 115 SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id 116 EXCEPT 117 SELECT person_id FROM writers w 118 ); 119 } 120 } {wilma} 121 122 123 124 finish_test 125
