wasCSharpSQLite – Blame information for rev 1

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1 office 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