database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

MDEV-13723: Server crashes in ha_heap::find_unique_row or Assertion `0' failed in st_select_lex_unit::optimize with INTERSECT

Browse Source 
With INTERSECT/EXCEPT fact that subquery item of IN/ALL/ANY was not assigned value does not mean that temporary table used for calculating unit is empty (records could be deleted).
This commit is contained in:
Oleksandr Byelkin
2017-11-10 11:22:51 +01:00
parent 06a9a366a3
commit 623ed1c204
5 changed files with 31 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
mysql-test/r/except.result
View File

@ -525,3 +525,13 @@ t3 CREATE TABLE `t3` (
`b1` blob DEFAULT NULL `b1` blob DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop tables t1,t2,t3; drop tables t1,t2,t3;
#
# MDEV-13723: Server crashes in ha_heap::find_unique_row or
# Assertion `0' failed in st_select_lex_unit::optimize with INTERSECT
#
CREATE TABLE t (i INT);
INSERT INTO t VALUES (1),(2);
SELECT * FROM t WHERE i != ANY ( SELECT 3 EXCEPT SELECT 3 );
i
drop table t;
# End of 10.3 tests

1
mysql-test/r/intersect.result
View File

@ -689,3 +689,4 @@ View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS (select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) union select `__3`.`c` AS `c`,`__3`.`d` AS `d` from ((select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)) `__3` union (select 4 AS `4`,4 AS `4`) latin1 latin1_swedish_ci v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS (select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`) union select `__3`.`c` AS `c`,`__3`.`d` AS `d` from ((select `test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2`) intersect (select `test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t3`)) `__3` union (select 4 AS `4`,4 AS `4`) latin1 latin1_swedish_ci
drop view v1; drop view v1;
drop tables t1,t2,t3; drop tables t1,t2,t3;
# End of 10.3 tests

14
mysql-test/t/except.test
View File

@ -81,3 +81,17 @@ create table t3 (select a,b,b1 from t1) except (select c,d,d1 from t2);
show create table t3; show create table t3;
drop tables t1,t2,t3; drop tables t1,t2,t3;
--echo #
--echo # MDEV-13723: Server crashes in ha_heap::find_unique_row or
--echo # Assertion `0' failed in st_select_lex_unit::optimize with INTERSECT
--echo #
CREATE TABLE t (i INT);
INSERT INTO t VALUES (1),(2);
SELECT * FROM t WHERE i != ANY ( SELECT 3 EXCEPT SELECT 3 );
drop table t;
--echo # End of 10.3 tests

1
mysql-test/t/intersect.test
View File

@ -190,3 +190,4 @@ show create view v1;
drop view v1; drop view v1;
drop tables t1,t2,t3; drop tables t1,t2,t3;
--echo # End of 10.3 tests

10
sql/sql_union.cc
View File

@ -1259,11 +1259,11 @@ bool st_select_lex_unit::optimize()
{ {
item->assigned(0); // We will reinit & rexecute unit item->assigned(0); // We will reinit & rexecute unit
item->reset(); item->reset();
if (table->is_created()) }
{ if (table->is_created())
table->file->ha_delete_all_rows(); {
table->file->info(HA_STATUS_VARIABLE); table->file->ha_delete_all_rows();
} table->file->info(HA_STATUS_VARIABLE);
} }
/* re-enabling indexes for next subselect iteration */ /* re-enabling indexes for next subselect iteration */
if (union_distinct && table->file->ha_enable_indexes(HA_KEY_SWITCH_ALL)) if (union_distinct && table->file->ha_enable_indexes(HA_KEY_SWITCH_ALL))