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Fixed bug #25027.

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Removed an assertion that was not valid for the cases where the query
in a prepared statement contained a single-row non-correlated
subquery that was used as an argument of the IS NULL predicate.
This commit is contained in:
igor@olga.mysql.com 2006-12-13 00:39:13 -08:00
parent 11cdca9a2f
commit 026196c4ef
3 changed files with 33 additions and 1 deletions
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15
mysql-test/r/ps.result
View File

@ -1514,4 +1514,19 @@ Variable_name Value
Slow_queries 1
deallocate prepare no_index;
deallocate prepare sq;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (NULL);
SELECT a FROM t1 WHERE (SELECT b FROM t2) IS NULL;
a
1
2
PREPARE stmt FROM 'SELECT a FROM t1 WHERE (SELECT b FROM t2) IS NULL';
EXECUTE stmt;
a
1
2
DEALLOCATE PREPARE stmt;
DROP TABLE t1,t2;
End of 5.0 tests.

18
mysql-test/t/ps.test
View File

@ -1563,4 +1563,22 @@ execute sq;
deallocate prepare no_index;
deallocate prepare sq;
#
# Bug 25027: query with a single-row non-correlated subquery
# and IS NULL predicate
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (NULL);
SELECT a FROM t1 WHERE (SELECT b FROM t2) IS NULL;
PREPARE stmt FROM 'SELECT a FROM t1 WHERE (SELECT b FROM t2) IS NULL';
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
DROP TABLE t1,t2;
--echo End of 5.0 tests.

1
sql/sql_lex.cc
View File

@ -1903,7 +1903,6 @@ void st_select_lex_unit::set_limit(SELECT_LEX *sl)
{
ha_rows select_limit_val;
DBUG_ASSERT(! thd->stmt_arena->is_stmt_prepare());
select_limit_val= (ha_rows)(sl->select_limit ? sl->select_limit->val_uint() :
HA_POS_ERROR);
offset_limit_cnt= (ha_rows)(sl->offset_limit ? sl->offset_limit->val_uint() :