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BUG#902632: Crash or invalid read at st_join_table::cleanup, st_table::disable_keyread

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- Do a "more thorough" cleanup of SJ-Materialization join tab in JOIN_TAB::cleanup. The bug
  was due to the fact that JOIN_TAB::cleanup() may be called multiple times for the same tab
  if the join has grouping.
This commit is contained in:
Sergey Petrunya 2011-12-14 02:15:15 +04:00
parent 988bd172b9
commit 190aa08557
4 changed files with 55 additions and 0 deletions
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16
mysql-test/r/subselect_mat.result
View file

@ -1764,6 +1764,22 @@ SELECT MIN(a) FROM t1, t2 WHERE b IN (SELECT c FROM t3 GROUP BY c);
MIN(a)
1
DROP TABLE t1,t2,t3;
#
# BUG#902632: Crash or invalid read at st_join_table::cleanup, st_table::disable_keyread
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
CREATE TABLE t2 ( b INT );
INSERT INTO t2 VALUES (3), (4);
CREATE TABLE t3 ( c INT );
INSERT INTO t3 VALUES (5), (6);
SELECT * FROM t1 WHERE EXISTS (
SELECT DISTINCT b FROM t2
WHERE b <= a
AND b IN ( SELECT c FROM t3 GROUP BY c )
);
a
DROP TABLE t1,t2,t3;
# This must be at the end:
set optimizer_switch=@subselect_sj_mat_tmp;
set @subselect_mat_test_optimizer_switch_value=null;

16
mysql-test/r/subselect_sj_mat.result
View file

@ -1800,5 +1800,21 @@ SELECT MIN(a) FROM t1, t2 WHERE b IN (SELECT c FROM t3 GROUP BY c);
MIN(a)
1
DROP TABLE t1,t2,t3;
#
# BUG#902632: Crash or invalid read at st_join_table::cleanup, st_table::disable_keyread
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
CREATE TABLE t2 ( b INT );
INSERT INTO t2 VALUES (3), (4);
CREATE TABLE t3 ( c INT );
INSERT INTO t3 VALUES (5), (6);
SELECT * FROM t1 WHERE EXISTS (
SELECT DISTINCT b FROM t2
WHERE b <= a
AND b IN ( SELECT c FROM t3 GROUP BY c )
);
a
DROP TABLE t1,t2,t3;
# This must be at the end:
set optimizer_switch=@subselect_sj_mat_tmp;

17
mysql-test/t/subselect_sj_mat.test
View file

@ -1465,6 +1465,23 @@ SELECT MIN(a) FROM t1, t2 WHERE b IN (SELECT c FROM t3 GROUP BY c);
DROP TABLE t1,t2,t3;
--echo #
--echo # BUG#902632: Crash or invalid read at st_join_table::cleanup, st_table::disable_keyread
--echo #
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
CREATE TABLE t2 ( b INT );
INSERT INTO t2 VALUES (3), (4);
CREATE TABLE t3 ( c INT );
INSERT INTO t3 VALUES (5), (6);
SELECT * FROM t1 WHERE EXISTS (
SELECT DISTINCT b FROM t2
WHERE b <= a
AND b IN ( SELECT c FROM t3 GROUP BY c )
);
DROP TABLE t1,t2,t3;
--echo # This must be at the end:
set optimizer_switch=@subselect_sj_mat_tmp;

6
sql/sql_select.cc
View file

@ -9738,6 +9738,12 @@ void JOIN_TAB::cleanup()
{
end_read_record(&read_record);
table->pos_in_table_list->jtbm_subselect->cleanup();
/*
The above call freed the materializedd temptable. Set it to NULL so
that we don't attempt to touch it if JOIN_TAB::cleanup() is invoked
multiple times (it may be)
*/
table=NULL;
}
DBUG_VOID_RETURN;
}