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Fix for bug#49517: Inconsistent behavior while using

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NULLable BIGINT and INT columns in comparison

Problem: a consequence of the fix for 43668.
Some Arg_comparator inner initialization missed,
that may lead to unpredictable (wrong) comparison
results.

Fix: always properly initialize Arg_comparator
before its usage.
This commit is contained in:
Ramil Kalimullin
2009-12-15 21:08:21 +04:00
parent b4def7bea1
commit 4422b0f665
4 changed files with 32 additions and 3 deletions
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15
mysql-test/r/select.result
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@@ -4619,4 +4619,19 @@ c1
9.1234
DROP TABLE t1;
# End of test for bug#49489.
#
# Bug #49517: Inconsistent behavior while using
# NULLable BIGINT and INT columns in comparison
#
CREATE TABLE t1(a BIGINT UNSIGNED NOT NULL, b BIGINT NULL, c INT NULL);
INSERT INTO t1 VALUES(105, NULL, NULL);
SELECT * FROM t1 WHERE b < 102;
a b c
SELECT * FROM t1 WHERE c < 102;
a b c
SELECT * FROM t1 WHERE 102 < b;
a b c
SELECT * FROM t1 WHERE 102 < c;
a b c
DROP TABLE t1;
End of 5.1 tests