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Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

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into  magare.gmz:/home/kgeorge/mysql/autopush/B30377-5.0-opt


sql/sql_select.cc:
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2007-08-29 12:47:24 +03:00
parent bdf19dc73b 310afbd4a9
commit bd1f34d932
4 changed files with 108 additions and 2 deletions
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32
mysql-test/t/status.test
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@ -139,4 +139,36 @@ disconnect con3;
disconnect con2;
disconnect con1;
#
# Bug #30377: EXPLAIN loses last_query_cost when used with UNION
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
EXPLAIN SELECT a FROM t1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
SHOW SESSION STATUS LIKE 'Last_query_cost';
EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
SELECT * FROM t1 a, t1 b LIMIT 1;
SHOW SESSION STATUS LIKE 'Last_query_cost';
DROP TABLE t1;
# End of 5.0 tests