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MDEV-7264: Assertion `0' failed in subselect_engine::get_identifier()

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Switch EXPLAIN JSON from using subselect_engine::get_identifier()
to the number from Item_subselect::unit.

Remove subselect_union_engine::get_identifier() because it was added
only for EXPLAIN JSON code.
This commit is contained in:
Sergei Petrunia
2014-12-06 04:02:30 +03:00
parent 5ee1c25fa8
commit 1e3f09f163
4 changed files with 49 additions and 7 deletions
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12
mysql-test/t/explain_json.test
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@@ -167,3 +167,15 @@ EXPLAIN FORMAT=JSON SELECT * FROM t1 AS outer_t1 WHERE a <> ALL ( SELECT a FROM
DROP TABLE t1,t2;
--echo #
--echo # MDEV-7264: Assertion `0' failed in subselect_engine::get_identifier() on EXPLAIN JSON
--echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (3),(4);
EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE a <> ALL ( SELECT b FROM t2 );
DROP TABLE t1, t2;