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# 2006 October 27
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this file is testing the use of indices in WHERE clauses.
# This file was created when support for optimizing IS NULL phrases
# was added. And so the principle purpose of this file is to test
# that IS NULL phrases are correctly optimized. But you can never
# have too many tests, so some other tests are thrown in as well.
#
# $Id: where4.test,v 1.6 2007/12/10 05:03:48 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix where4
ifcapable !tclvar||!bloblit {
finish_test
return
}
# Build some test data
#
do_test where4-1.0 {
execsql {
CREATE TABLE t1(w, x, y);
CREATE INDEX i1wxy ON t1(w,x,y);
INSERT INTO t1 VALUES(1,2,3);
INSERT INTO t1 VALUES(1,NULL,3);
INSERT INTO t1 VALUES('a','b','c');
INSERT INTO t1 VALUES('a',NULL,'c');
INSERT INTO t1 VALUES(X'78',x'79',x'7a');
INSERT INTO t1 VALUES(X'78',NULL,X'7A');
INSERT INTO t1 VALUES(NULL,NULL,NULL);
SELECT count(*) FROM t1;
}
} {7}
# Do an SQL statement. Append the search count to the end of the result.
#
proc count sql {
set ::sqlite_search_count 0
return [concat [execsql $sql] $::sqlite_search_count]
}
# Verify that queries use an index. We are using the special variable
# "sqlite_search_count" which tallys the number of executions of MoveTo
# and Next operators in the VDBE. By verifing that the search count is
# small we can be assured that indices are being used properly.
#
do_test where4-1.1 {
count {SELECT rowid FROM t1 WHERE w IS NULL}
} {7 2}
do_test where4-1.1b {
unset -nocomplain null
count {SELECT rowid FROM t1 WHERE w IS $null}
} {7 2}
do_test where4-1.2 {
count {SELECT rowid FROM t1 WHERE +w IS NULL}
} {7 6}
do_test where4-1.3 {
count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL}
} {2 2}
do_test where4-1.4 {
count {SELECT rowid FROM t1 WHERE w=1 AND +x IS NULL}
} {2 3}
do_test where4-1.5 {
count {SELECT rowid FROM t1 WHERE w=1 AND x>0}
} {1 2}
do_test where4-1.6 {
count {SELECT rowid FROM t1 WHERE w=1 AND x<9}
} {1 2}
do_test where4-1.7 {
count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y=3}
} {2 2}
do_test where4-1.8 {
count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y>2}
} {2 2}
do_test where4-1.9 {
count {SELECT rowid FROM t1 WHERE w='a' AND x IS NULL AND y='c'}
} {4 2}
do_test where4-1.10 {
count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL}
} {6 2}
do_test where4-1.11 {
count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=123}
} {0}
do_test where4-1.12 {
count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=x'7A'}
} {6 2}
do_test where4-1.13 {
count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL}
} {7 2}
do_test where4-1.14 {
count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y IS NULL}
} {7 2}
do_test where4-1.15 {
count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y<0}
} {1}
do_test where4-1.16 {
count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y>=0}
} {1}
do_test where4-2.1 {
execsql {SELECT rowid FROM t1 ORDER BY w, x, y}
} {7 2 1 4 3 6 5}
do_test where4-2.2 {
execsql {SELECT rowid FROM t1 ORDER BY w DESC, x, y}
} {6 5 4 3 2 1 7}
do_test where4-2.3 {
execsql {SELECT rowid FROM t1 ORDER BY w, x DESC, y}
} {7 1 2 3 4 5 6}
# Ticket #2177
#
# Suppose you have a left join where the right table of the left
# join (the one that can be NULL) has an index on two columns.
# The first indexed column is used in the ON clause of the join.
# The second indexed column is used in the WHERE clause with an IS NULL
# constraint. It is not allowed to use the IS NULL optimization to
# optimize the query because the second column might be NULL because
# the right table did not match - something the index does not know
# about.
#
do_test where4-3.1 {
execsql {
CREATE TABLE t2(a);
INSERT INTO t2 VALUES(1);
INSERT INTO t2 VALUES(2);
INSERT INTO t2 VALUES(3);
CREATE TABLE t3(x,y,UNIQUE("x",'y' ASC)); -- Goofy syntax allowed
INSERT INTO t3 VALUES(1,11);
INSERT INTO t3 VALUES(2,NULL);
SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE +y IS NULL;
}
} {2 2 {} 3 {} {}}
do_test where4-3.2 {
execsql {
SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS NULL;
}
} {2 2 {} 3 {} {}}
do_test where4-3.3 {
execsql {
SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE NULL is y;
}
} {2 2 {} 3 {} {}}
do_test where4-3.4 {
unset -nocomplain null
execsql {
SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS $null;
}
} {2 2 {} 3 {} {}}
# Ticket #2189. Probably the same bug as #2177.
#
do_test where4-4.1 {
execsql {
CREATE TABLE test(col1 TEXT PRIMARY KEY);
INSERT INTO test(col1) values('a');
INSERT INTO test(col1) values('b');
INSERT INTO test(col1) values('c');
CREATE TABLE test2(col1 TEXT PRIMARY KEY);
INSERT INTO test2(col1) values('a');
INSERT INTO test2(col1) values('b');
INSERT INTO test2(col1) values('c');
SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
WHERE +t2.col1 IS NULL;
}
} {}
do_test where4-4.2 {
execsql {
SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
WHERE t2.col1 IS NULL;
}
} {}
do_test where4-4.3 {
execsql {
SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
WHERE +t1.col1 IS NULL;
}
} {}
do_test where4-4.4 {
execsql {
SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
WHERE t1.col1 IS NULL;
}
} {}
# Ticket #2273. Problems with IN operators and NULLs.
#
ifcapable subquery {
do_test where4-5.1 {
execsql {
-- Allow the 'x' syntax for backwards compatibility
CREATE TABLE t4(x,y,z,PRIMARY KEY('x' ASC, "y" ASC));
}
execsql {
SELECT *
FROM t2 LEFT JOIN t4 b1
LEFT JOIN t4 b2 ON b2.x=b1.x AND b2.y IN (b1.y);
}
} {1 {} {} {} {} {} {} 2 {} {} {} {} {} {} 3 {} {} {} {} {} {}}
do_test where4-5.2 {
execsql {
INSERT INTO t4 VALUES(1,1,11);
INSERT INTO t4 VALUES(1,2,12);
INSERT INTO t4 VALUES(1,3,13);
INSERT INTO t4 VALUES(2,2,22);
SELECT rowid FROM t4 WHERE x IN (1,9,2,5) AND y IN (1,3,NULL,2) AND z!=13;
}
} {1 2 4}
do_test where4-5.3 {
execsql {
SELECT rowid FROM t4 WHERE x IN (1,9,NULL,2) AND y IN (1,3,2) AND z!=13;
}
} {1 2 4}
do_test where4-6.1 {
execsql {
CREATE TABLE t5(a,b,c,d,e,f,UNIQUE(a,b,c,d,e,f));
INSERT INTO t5 VALUES(1,1,1,1,1,11111);
INSERT INTO t5 VALUES(2,2,2,2,2,22222);
INSERT INTO t5 VALUES(1,2,3,4,5,12345);
INSERT INTO t5 VALUES(2,3,4,5,6,23456);
}
execsql {
SELECT rowid FROM t5
WHERE a IN (1,9,2) AND b=2 AND c IN (1,2,3,4) AND d>0
}
} {3 2}
do_test where4-6.2 {
execsql {
SELECT rowid FROM t5
WHERE a IN (1,NULL,2) AND b=2 AND c IN (1,2,3,4) AND d>0
}
} {3 2}
do_test where4-7.1 {
execsql {
CREATE TABLE t6(y,z,PRIMARY KEY(y,z));
}
execsql {
SELECT * FROM t6 WHERE y=NULL AND z IN ('hello');
}
} {}
integrity_check {where4-99.0}
do_test where4-7.1 {
execsql {
BEGIN;
CREATE TABLE t8(a, b, c, d);
CREATE INDEX t8_i ON t8(a, b, c);
CREATE TABLE t7(i);
INSERT INTO t7 VALUES(1);
INSERT INTO t7 SELECT i*2 FROM t7;
INSERT INTO t7 SELECT i*2 FROM t7;
INSERT INTO t7 SELECT i*2 FROM t7;
INSERT INTO t7 SELECT i*2 FROM t7;
INSERT INTO t7 SELECT i*2 FROM t7;
INSERT INTO t7 SELECT i*2 FROM t7;
COMMIT;
}
} {}
# At one point the sub-select inside the aggregate sum() function in the
# following query was leaking a couple of stack entries. This query
# runs the SELECT in a loop enough times that an assert() fails. Or rather,
# did fail before the bug was fixed.
#
do_test where4-7.2 {
execsql {
SELECT sum((
SELECT d FROM t8 WHERE a = i AND b = i AND c < NULL
)) FROM t7;
}
} {{}}
}; #ifcapable subquery
#-------------------------------------------------------------------------
# Verify that "IS ?" with a NULL bound to the variable also functions
# correctly.
unset -nocomplain null
do_execsql_test 8.1 {
CREATE TABLE u9(a UNIQUE, b);
INSERT INTO u9 VALUES(NULL, 1);
INSERT INTO u9 VALUES(NULL, 2);
}
do_execsql_test 8.2 { SELECT * FROM u9 WHERE a IS NULL } {{} 1 {} 2}
do_execsql_test 8.2 { SELECT * FROM u9 WHERE a IS $null } {{} 1 {} 2}
finish_test