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Fixed LP bug #702310 / bug #59493.

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An assertion failure was triggered for a 6-way join query that uses two
join buffers.
The failure happened because every call of the function flush_cached_records()
saved and restored status of all tables before the table join_tab. It
must do it only for those of them that follow the last table that uses
a join buffer.
This commit is contained in:
Igor Babaev
2011-01-14 02:05:10 -08:00
parent d0e8dbc4a3
commit c8e56e3713
3 changed files with 116 additions and 2 deletions
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33
mysql-test/t/select.test
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@ -4087,5 +4087,38 @@ EXPLAIN SELECT 1 FROM t1 ORDER BY a COLLATE latin1_german2_ci;
SELECT 1 FROM t1 ORDER BY a COLLATE latin1_german2_ci;
DROP TABLE t1;
--echo #
--echo # Bug #702310: usage of 2 join buffers after ref access to an empty table
--echo #
CREATE TABLE t1 (f1 int) ;
INSERT INTO t1 VALUES (9);
CREATE TABLE t2 (f1 int);
INSERT INTO t2 VALUES (3),(7),(18);
INSERT INTO t2 VALUES (3),(7),(18);
INSERT INTO t2 VALUES (3),(7),(18);
INSERT INTO t2 VALUES (3),(7),(18);
CREATE TABLE t3 (f1 int);
INSERT INTO t3 VALUES (17);
CREATE TABLE t4 (f1 int PRIMARY KEY, f2 varchar(1024)) ;
CREATE TABLE t5 (f1 int) ;
INSERT INTO t5 VALUES (20),(5);
CREATE TABLE t6(f1 int);
INSERT INTO t6 VALUES (9),(7);
SET SESSION join_buffer_size = 9000;
EXPLAIN
SELECT STRAIGHT_JOIN * FROM t2, (t1 LEFT JOIN (t3,t4) ON t1.f1 = t4.f1), t5, t6;
SELECT STRAIGHT_JOIN * FROM t2, (t1 LEFT JOIN (t3,t4) ON t1.f1 = t4.f1), t5, t6;
SET SESSION join_buffer_size = DEFAULT;
DROP TABLE t1,t2,t3,t4,t5,t6;
--echo End of 5.1 tests