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Ramil Kalimullin 2010-01-29 15:08:49 +04:00
commit 7805a2c7c0
4 changed files with 118 additions and 0 deletions
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40
mysql-test/t/select.test
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@ -3836,6 +3836,46 @@ EXPLAIN EXTENDED SELECT x.a, y.a, z.a FROM t1 x
DROP TABLE t1;
--echo #
--echo # Bug #49897: crash in ptr_compare when char(0) NOT NULL
--echo # column is used for ORDER BY
--echo #
SET @old_sort_buffer_size= @@session.sort_buffer_size;
SET @@sort_buffer_size= 40000;
CREATE TABLE t1(a CHAR(0) NOT NULL);
--disable_warnings
INSERT INTO t1 VALUES (0), (0), (0);
--enable_warnings
INSERT INTO t1 SELECT t11.a FROM t1 t11, t1 t12;
INSERT INTO t1 SELECT t11.a FROM t1 t11, t1 t12;
INSERT INTO t1 SELECT t11.a FROM t1 t11, t1 t12;
EXPLAIN SELECT a FROM t1 ORDER BY a;
--disable_result_log
SELECT a FROM t1 ORDER BY a;
--enable_result_log
DROP TABLE t1;
CREATE TABLE t1(a CHAR(0) NOT NULL, b CHAR(0) NOT NULL, c int);
--disable_warnings
INSERT INTO t1 VALUES (0, 0, 0), (0, 0, 2), (0, 0, 1);
--enable_warnings
INSERT INTO t1 SELECT t11.a, t11.b, t11.c FROM t1 t11, t1 t12;
INSERT INTO t1 SELECT t11.a, t11.b, t11.c FROM t1 t11, t1 t12;
INSERT INTO t1 SELECT t11.a, t11.b, t11.c FROM t1 t11, t1 t12;
EXPLAIN SELECT a FROM t1 ORDER BY a LIMIT 5;
SELECT a FROM t1 ORDER BY a LIMIT 5;
EXPLAIN SELECT * FROM t1 ORDER BY a, b LIMIT 5;
SELECT * FROM t1 ORDER BY a, b LIMIT 5;
EXPLAIN SELECT * FROM t1 ORDER BY a, b, c LIMIT 5;
SELECT * FROM t1 ORDER BY a, b, c LIMIT 5;
EXPLAIN SELECT * FROM t1 ORDER BY c, a LIMIT 5;
SELECT * FROM t1 ORDER BY c, a LIMIT 5;
SET @@sort_buffer_size= @old_sort_buffer_size;
DROP TABLE t1;
--echo End of 5.0 tests
#