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BUG#906385: EXPLAIN EXTENDED crashes in TABLE_LIST::print with limited max_join_size

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- Take into account that subquery's optimization can fail because of @@max_join_size error.
This commit is contained in:
Sergey Petrunya 2011-12-19 22:24:10 +04:00
commit 15ea7238e4
3 changed files with 61 additions and 1 deletions
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29
mysql-test/t/subselect_sj2_mat.test
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@ -8,3 +8,32 @@ set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
set optimizer_switch=default;
select @@optimizer_switch like '%materialization=on%';
--echo #
--echo # BUG#906385: EXPLAIN EXTENDED crashes in TABLE_LIST::print with limited max_join_size
--echo #
CREATE TABLE t1 ( a INT );
CREATE TABLE t2 ( b INT );
INSERT INTO t1 VALUES (1),(2);
INSERT INTO t2 VALUES
(1),(2),(3),(4),(5),
(6),(7),(8),(9),(10),
(11),(12),(13),(14),(15),
(16),(17),(18),(19),(20);
set @tmp_906385=@@max_join_size;
SET max_join_size = 80;
--error ER_TOO_BIG_SELECT
EXPLAIN EXTENDED
SELECT COUNT(*) FROM t1
WHERE a IN
( SELECT b FROM t2 GROUP BY b )
AND ( 6 ) IN
( SELECT MIN( t2.b ) FROM t2 alias1, t2 );
DROP TABLE t1, t2;
set max_join_size= @tmp_906385;