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MDEV-18145 Assertion `0' failed in Item::val_native upon SELECT subquery with timestamp

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This commit is contained in:
Alexander Barkov
2019-01-14 15:23:10 +04:00
parent ac9b818c24
commit d97a26a67d
3 changed files with 25 additions and 2 deletions
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12
mysql-test/main/type_timestamp.result
View File

@@ -1152,5 +1152,17 @@ f
NULL NULL
DROP TABLE t1; DROP TABLE t1;
# #
# MDEV-18145 Assertion `0' failed in Item::val_native upon SELECT subquery with timestamp
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (pk INT PRIMARY KEY) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1),(2);
CREATE TABLE t3 (pk INT PRIMARY KEY, b TIMESTAMP) ENGINE=MyISAM;
SELECT ( SELECT b FROM t1 LIMIT 1 ) AS sq FROM t2 LEFT JOIN t3 USING (pk);
sq
NULL
NULL
DROP TABLE t1, t2, t3;
#
# End of 10.4 tests # End of 10.4 tests
# #

11
mysql-test/main/type_timestamp.test
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@@ -749,6 +749,17 @@ INSERT INTO t1 () VALUES (),();
SELECT IF(0,t,NULL) AS f FROM t1 GROUP BY 'foo'; SELECT IF(0,t,NULL) AS f FROM t1 GROUP BY 'foo';
DROP TABLE t1; DROP TABLE t1;
--echo #
--echo # MDEV-18145 Assertion `0' failed in Item::val_native upon SELECT subquery with timestamp
--echo #
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (pk INT PRIMARY KEY) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1),(2);
CREATE TABLE t3 (pk INT PRIMARY KEY, b TIMESTAMP) ENGINE=MyISAM;
SELECT ( SELECT b FROM t1 LIMIT 1 ) AS sq FROM t2 LEFT JOIN t3 USING (pk);
DROP TABLE t1, t2, t3;
--echo # --echo #
--echo # End of 10.4 tests --echo # End of 10.4 tests

4
sql/item_subselect.cc
View File

@@ -1084,7 +1084,7 @@ void Item_maxmin_subselect::no_rows_in_result()
*/ */
if (parsing_place != SELECT_LIST || const_item()) if (parsing_place != SELECT_LIST || const_item())
return; return;
value= (new (thd->mem_root) Item_null(thd))->get_cache(thd); value= get_cache(thd);
null_value= 0; null_value= 0;
was_values= 0; was_values= 0;
make_const(); make_const();
@@ -1102,7 +1102,7 @@ void Item_singlerow_subselect::no_rows_in_result()
*/ */
if (parsing_place != SELECT_LIST || const_item()) if (parsing_place != SELECT_LIST || const_item())
return; return;
value= (new (thd->mem_root) Item_null(thd))->get_cache(thd); value= get_cache(thd);
reset(); reset();
make_const(); make_const();
} }