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
24 ifcapable !tclvar||!bloblit {
29 # Build some test data
33 CREATE TABLE t1(w, x, y);
34 CREATE INDEX i1wxy ON t1(w,x,y);
35 INSERT INTO t1 VALUES(1,2,3);
36 INSERT INTO t1 VALUES(1,NULL,3);
37 INSERT INTO t1 VALUES('a','b','c');
38 INSERT INTO t1 VALUES('a',NULL,'c');
39 INSERT INTO t1 VALUES(X'78',x'79',x'7a');
40 INSERT INTO t1 VALUES(X'78',NULL,X'7A');
41 INSERT INTO t1 VALUES(NULL,NULL,NULL);
42 SELECT count(*) FROM t1;
46 # Do an SQL statement. Append the search count to the end of the result.
49 set ::sqlite_search_count 0
50 return [concat [execsql $sql] $::sqlite_search_count]
53 # Verify that queries use an index. We are using the special variable
54 # "sqlite_search_count" which tallys the number of executions of MoveTo
55 # and Next operators in the VDBE. By verifing that the search count is
56 # small we can be assured that indices are being used properly.
59 count {SELECT rowid FROM t1 WHERE w IS NULL}
62 unset -nocomplain null
63 count {SELECT rowid FROM t1 WHERE w IS $null}
66 count {SELECT rowid FROM t1 WHERE +w IS NULL}
69 count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL}
72 count {SELECT rowid FROM t1 WHERE w=1 AND +x IS NULL}
75 count {SELECT rowid FROM t1 WHERE w=1 AND x>0}
78 count {SELECT rowid FROM t1 WHERE w=1 AND x<9}
81 count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y=3}
84 count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y>2}
87 count {SELECT rowid FROM t1 WHERE w='a' AND x IS NULL AND y='c'}
90 count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL}
93 count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=123}
96 count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=x'7A'}
99 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL}
101 do_test where4-1.14 {
102 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y IS NULL}
104 do_test where4-1.15 {
105 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y<0}
107 do_test where4-1.16 {
108 count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y>=0}
112 execsql {SELECT rowid FROM t1 ORDER BY w, x, y}
115 execsql {SELECT rowid FROM t1 ORDER BY w DESC, x, y}
118 execsql {SELECT rowid FROM t1 ORDER BY w, x DESC, y}
124 # Suppose you have a left join where the right table of the left
125 # join (the one that can be NULL) has an index on two columns.
126 # The first indexed column is used in the ON clause of the join.
127 # The second indexed column is used in the WHERE clause with an IS NULL
128 # constraint. It is not allowed to use the IS NULL optimization to
129 # optimize the query because the second column might be NULL because
130 # the right table did not match - something the index does not know
136 INSERT INTO t2 VALUES(1);
137 INSERT INTO t2 VALUES(2);
138 INSERT INTO t2 VALUES(3);
139 CREATE TABLE t3(x,y,UNIQUE("x",'y' ASC)); -- Goofy syntax allowed
140 INSERT INTO t3 VALUES(1,11);
141 INSERT INTO t3 VALUES(2,NULL);
143 SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE +y IS NULL;
148 SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS NULL;
153 SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE NULL is y;
157 unset -nocomplain null
159 SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS $null;
163 # Ticket #2189. Probably the same bug as #2177.
167 CREATE TABLE test(col1 TEXT PRIMARY KEY);
168 INSERT INTO test(col1) values('a');
169 INSERT INTO test(col1) values('b');
170 INSERT INTO test(col1) values('c');
171 CREATE TABLE test2(col1 TEXT PRIMARY KEY);
172 INSERT INTO test2(col1) values('a');
173 INSERT INTO test2(col1) values('b');
174 INSERT INTO test2(col1) values('c');
175 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
176 WHERE +t2.col1 IS NULL;
181 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
182 WHERE t2.col1 IS NULL;
187 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
188 WHERE +t1.col1 IS NULL;
193 SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
194 WHERE t1.col1 IS NULL;
198 # Ticket #2273. Problems with IN operators and NULLs.
203 -- Allow the 'x' syntax for backwards compatibility
204 CREATE TABLE t4(x,y,z,PRIMARY KEY('x' ASC, "y" ASC));
208 FROM t2 LEFT JOIN t4 b1
209 LEFT JOIN t4 b2 ON b2.x=b1.x AND b2.y IN (b1.y);
211 } {1 {} {} {} {} {} {} 2 {} {} {} {} {} {} 3 {} {} {} {} {} {}}
214 INSERT INTO t4 VALUES(1,1,11);
215 INSERT INTO t4 VALUES(1,2,12);
216 INSERT INTO t4 VALUES(1,3,13);
217 INSERT INTO t4 VALUES(2,2,22);
218 SELECT rowid FROM t4 WHERE x IN (1,9,2,5) AND y IN (1,3,NULL,2) AND z!=13;
223 SELECT rowid FROM t4 WHERE x IN (1,9,NULL,2) AND y IN (1,3,2) AND z!=13;
228 CREATE TABLE t5(a,b,c,d,e,f,UNIQUE(a,b,c,d,e,f));
229 INSERT INTO t5 VALUES(1,1,1,1,1,11111);
230 INSERT INTO t5 VALUES(2,2,2,2,2,22222);
231 INSERT INTO t5 VALUES(1,2,3,4,5,12345);
232 INSERT INTO t5 VALUES(2,3,4,5,6,23456);
236 WHERE a IN (1,9,2) AND b=2 AND c IN (1,2,3,4) AND d>0
242 WHERE a IN (1,NULL,2) AND b=2 AND c IN (1,2,3,4) AND d>0
247 CREATE TABLE t6(y,z,PRIMARY KEY(y,z));
250 SELECT * FROM t6 WHERE y=NULL AND z IN ('hello');
254 integrity_check {where4-99.0}
259 CREATE TABLE t8(a, b, c, d);
260 CREATE INDEX t8_i ON t8(a, b, c);
263 INSERT INTO t7 VALUES(1);
264 INSERT INTO t7 SELECT i*2 FROM t7;
265 INSERT INTO t7 SELECT i*2 FROM t7;
266 INSERT INTO t7 SELECT i*2 FROM t7;
267 INSERT INTO t7 SELECT i*2 FROM t7;
268 INSERT INTO t7 SELECT i*2 FROM t7;
269 INSERT INTO t7 SELECT i*2 FROM t7;
275 # At one point the sub-select inside the aggregate sum() function in the
276 # following query was leaking a couple of stack entries. This query
277 # runs the SELECT in a loop enough times that an assert() fails. Or rather,
278 # did fail before the bug was fixed.
283 SELECT d FROM t8 WHERE a = i AND b = i AND c < NULL
288 }; #ifcapable subquery
290 #-------------------------------------------------------------------------
291 # Verify that "IS ?" with a NULL bound to the variable also functions
294 unset -nocomplain null
296 do_execsql_test 8.1 {
297 CREATE TABLE u9(a UNIQUE, b);
298 INSERT INTO u9 VALUES(NULL, 1);
299 INSERT INTO u9 VALUES(NULL, 2);
301 do_execsql_test 8.2 { SELECT * FROM u9 WHERE a IS NULL } {{} 1 {} 2}
302 do_execsql_test 8.2 { SELECT * FROM u9 WHERE a IS $null } {{} 1 {} 2}