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Fixed bug mdev-6874.

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The method subselect_union_engine::no_rows() must take
into account the fact that now unit->fake_select_lex is
NULL for for select_union_direct objects.
This commit is contained in:
Igor Babaev 2014-10-17 12:59:28 -07:00
commit a4d1783aae
5 changed files with 30 additions and 2 deletions
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12
mysql-test/t/union.test
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@ -1387,3 +1387,15 @@ DROP TABLE t1, t2;
--echo # End of WL1763 tests
--echo #
--echo # Bug mdev-6874: crash with UNION ALL in a subquery
--echo #
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1,1), (2,8);
SELECT * FROM t1 t1_1 LEFT JOIN t1 t1_2 ON ( t1_2.b = t1_1.a )
WHERE t1_2.b NOT IN ( SELECT 4 UNION ALL SELECT 5 );
DROP TABLE t1;