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Ignore NULLs in a subquery as the right operand of IN. Ticket #565. (CVS 1175)

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FossilOrigin-Name: c9e7996fb9080b715e9b273a3ac3ed3744e10a77
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drh
2004-01-14 13:38:54 +00:00
parent f6a7ade6b6
commit 52b36cabe0
4 changed files with 47 additions and 14 deletions
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30
test/misc3.test
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@ -13,7 +13,7 @@
# This file implements tests for miscellanous features that were
# left out of other test files.
#
# $Id: misc3.test,v 1.4 2004/01/06 01:52:34 drh Exp $
# $Id: misc3.test,v 1.5 2004/01/14 13:38:54 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@ -178,5 +178,33 @@ do_test misc3-3.14 {
}
} {2147483646}
# Ticket #565. A stack overflow is occurring when the subquery to the
# right of an IN operator contains many NULLs
#
do_test misc3-4.1 {
execsql {
CREATE TABLE t3(a INTEGER PRIMARY KEY, b);
INSERT INTO t3(b) VALUES('abc');
INSERT INTO t3(b) VALUES('xyz');
INSERT INTO t3(b) VALUES(NULL);
INSERT INTO t3(b) VALUES(NULL);
INSERT INTO t3(b) SELECT b||'d' FROM t3;
INSERT INTO t3(b) SELECT b||'e' FROM t3;
INSERT INTO t3(b) SELECT b||'f' FROM t3;
INSERT INTO t3(b) SELECT b||'g' FROM t3;
INSERT INTO t3(b) SELECT b||'h' FROM t3;
SELECT count(a), count(b) FROM t3;
}
} {128 64}
do_test misc3-4.2 {
execsql {
SELECT count(a) FROM t3 WHERE b IN (SELECT b FROM t3);
}
} {64}
do_test misc3-4.3 {
execsql {
SELECT count(a) FROM t3 WHERE b IN (SELECT b FROM t3 ORDER BY a+1);
}
} {64}
finish_test