3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus of this file is testing the use of indices in WHERE clauses.
13 # This file was created when support for optimizing IS NULL phrases
14 # was added. And so the principle purpose of this file is to test
15 # that IS NULL phrases are correctly optimized. But you can never
16 # have too many tests, so some other tests are thrown in as well.
18 # $Id: where4.test,v 1.6 2007/12/10 05:03:48 danielk1977 Exp $
20 set testdir [file dirname $argv0]
21 source $testdir/tester.tcl
23 ifcapable !tclvar||!bloblit {
28 # Build some test data
32 CREATE TABLE t1(w, x, y);
33 CREATE INDEX i1wxy ON t1(w,x,y);
34 INSERT INTO t1 VALUES(1,2,3);
35 INSERT INTO t1 VALUES(1,NULL,3);
36 INSERT INTO t1 VALUES('a','b','c');
37 INSERT INTO t1 VALUES('a',NULL,'c');
38 INSERT INTO t1 VALUES(X'78',x'79',x'7a');
39 INSERT INTO t1 VALUES(X'78',NULL,X'7A');
40 INSERT INTO t1 VALUES(NULL,NULL,NULL);
41 SELECT count(*) FROM t1;
45 # Do an SQL statement. Append the search count to the end of the result.
48 set ::sqlite_search_count 0
49 return [concat [execsql $sql] $::sqlite_search_count]
52 # Verify that queries use an index. We are using the special variable
53 # "sqlite_search_count" which tallys the number of executions of MoveTo
54 # and Next operators in the VDBE. By verifing that the search count is
55 # small we can be assured that indices are being used properly.
58 count {SELECT rowid FROM t1 WHERE w IS NULL}
61 count {SELECT rowid FROM t1 WHERE +w IS NULL}
64 count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL}
67 count {SELECT rowid FROM t1 WHERE w=1 AND +x IS NULL}
70 count {SELECT rowid FROM t1 WHERE w=1 AND x>0}
73 count {SELECT rowid FROM t1 WHERE w=1 AND x<9}
76 count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y=3}
79 count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y>2}
82 count {SELECT rowid FROM t1 WHERE w='a' AND x IS NULL AND y='c'}
85 count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL}
88 count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=123}
91 count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=x'7A'}
94 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL}
97 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y IS NULL}
100 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y<0}
102 do_test where4-1.16 {
103 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y>=0}
107 execsql {SELECT rowid FROM t1 ORDER BY w, x, y}
110 execsql {SELECT rowid FROM t1 ORDER BY w DESC, x, y}
113 execsql {SELECT rowid FROM t1 ORDER BY w, x DESC, y}
119 # Suppose you have a left join where the right table of the left
120 # join (the one that can be NULL) has an index on two columns.
121 # The first indexed column is used in the ON clause of the join.
122 # The second indexed column is used in the WHERE clause with an IS NULL
123 # constraint. It is not allowed to use the IS NULL optimization to
124 # optimize the query because the second column might be NULL because
125 # the right table did not match - something the index does not know
131 INSERT INTO t2 VALUES(1);
132 INSERT INTO t2 VALUES(2);
133 INSERT INTO t2 VALUES(3);
134 CREATE TABLE t3(x,y,UNIQUE(x,y));
135 INSERT INTO t3 VALUES(1,11);
136 INSERT INTO t3 VALUES(2,NULL);
138 SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE +y IS NULL;
143 SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS NULL;
147 # Ticket #2189. Probably the same bug as #2177.
151 CREATE TABLE test(col1 TEXT PRIMARY KEY);
152 INSERT INTO test(col1) values('a');
153 INSERT INTO test(col1) values('b');
154 INSERT INTO test(col1) values('c');
155 CREATE TABLE test2(col1 TEXT PRIMARY KEY);
156 INSERT INTO test2(col1) values('a');
157 INSERT INTO test2(col1) values('b');
158 INSERT INTO test2(col1) values('c');
159 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
160 WHERE +t2.col1 IS NULL;
165 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
166 WHERE t2.col1 IS NULL;
171 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
172 WHERE +t1.col1 IS NULL;
177 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
178 WHERE t1.col1 IS NULL;
182 # Ticket #2273. Problems with IN operators and NULLs.
187 CREATE TABLE t4(x,y,z,PRIMARY KEY(x,y));
191 FROM t2 LEFT JOIN t4 b1
192 LEFT JOIN t4 b2 ON b2.x=b1.x AND b2.y IN (b1.y);
194 } {1 {} {} {} {} {} {} 2 {} {} {} {} {} {} 3 {} {} {} {} {} {}}
197 INSERT INTO t4 VALUES(1,1,11);
198 INSERT INTO t4 VALUES(1,2,12);
199 INSERT INTO t4 VALUES(1,3,13);
200 INSERT INTO t4 VALUES(2,2,22);
201 SELECT rowid FROM t4 WHERE x IN (1,9,2,5) AND y IN (1,3,NULL,2) AND z!=13;
206 SELECT rowid FROM t4 WHERE x IN (1,9,NULL,2) AND y IN (1,3,2) AND z!=13;
211 CREATE TABLE t5(a,b,c,d,e,f,UNIQUE(a,b,c,d,e,f));
212 INSERT INTO t5 VALUES(1,1,1,1,1,11111);
213 INSERT INTO t5 VALUES(2,2,2,2,2,22222);
214 INSERT INTO t5 VALUES(1,2,3,4,5,12345);
215 INSERT INTO t5 VALUES(2,3,4,5,6,23456);
219 WHERE a IN (1,9,2) AND b=2 AND c IN (1,2,3,4) AND d>0
225 WHERE a IN (1,NULL,2) AND b=2 AND c IN (1,2,3,4) AND d>0
230 CREATE TABLE t6(y,z,PRIMARY KEY(y,z));
233 SELECT * FROM t6 WHERE y=NULL AND z IN ('hello');
237 integrity_check {where4-99.0}
242 CREATE TABLE t8(a, b, c, d);
243 CREATE INDEX t8_i ON t8(a, b, c);
246 INSERT INTO t7 VALUES(1);
247 INSERT INTO t7 SELECT i*2 FROM t7;
248 INSERT INTO t7 SELECT i*2 FROM t7;
249 INSERT INTO t7 SELECT i*2 FROM t7;
250 INSERT INTO t7 SELECT i*2 FROM t7;
251 INSERT INTO t7 SELECT i*2 FROM t7;
252 INSERT INTO t7 SELECT i*2 FROM t7;
258 # At one point the sub-select inside the aggregate sum() function in the
259 # following query was leaking a couple of stack entries. This query
260 # runs the SELECT in a loop enough times that an assert() fails. Or rather,
261 # did fail before the bug was fixed.
266 SELECT d FROM t8 WHERE a = i AND b = i AND c < NULL
271 }; #ifcapable subquery