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MDEV-7927: Server crashes in in Time_and_counter_tracker::incr_loops

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- JOIN::save_explain_data should also set JOIN::tracker (it already
  sets join_tab[0].tracker). This is needed for UNIONs inside subqueries.
This commit is contained in:
Sergei Petrunia
2015-04-08 03:33:48 +03:00
parent 0df8c0aa5e
commit 2b475b567e
3 changed files with 23 additions and 1 deletions
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12
mysql-test/r/explain_json.result
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@ -894,3 +894,15 @@ EXPLAIN
}
}
DROP TABLE t1, t2;
#
# MDEV-7927: Server crashes in in Time_and_counter_tracker::incr_loops
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN SELECT * FROM t1 WHERE 3 IN ( SELECT 4 UNION SELECT 5 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used
3 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
DROP TABLE t1;