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This commit is contained in:
Igor Babaev
2011-12-05 18:51:56 -08:00
parent a85454def8 7d1f41265c
commit c28d7cbe70
4 changed files with 135 additions and 14 deletions
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47
mysql-test/r/join_cache.result
View File

@ -5179,4 +5179,51 @@ a b
SET SESSION join_cache_level = DEFAULT;
SET optimizer_switch=@tmp887479_optimizer_switch;
DROP TABLE t1,t2;
#
# Bug #899777: join_cache_level=4 + semijoin=on
#
CREATE TABLE t1 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t1 VALUES (1,8,6), (2,2,8);
CREATE TABLE t2 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t2 VALUES (1,8,6), (2,2,8);
CREATE TABLE t3 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t3 VALUES (1,8,6), (2,2,8);
CREATE TABLE t4 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t4 VALUES (1,8,6), (2,2,8);
SET @tmp_optimizer_switch=@@optimizer_switch;
SET SESSION optimizer_switch='semijoin=on';
SET SESSION optimizer_switch='semijoin_with_cache=on';
SET SESSION join_cache_level=1;
EXPLAIN
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 const idx idx 5 const 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where; Start temporary; Using join buffer (flat, BNL join)
1 PRIMARY t4 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join)
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
a b c
1 8 6
SET SESSION join_cache_level=4;
EXPLAIN
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 const idx idx 5 const 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
1 PRIMARY t3 hash_ALL NULL #hash#$hj 5 const 2 Using where; Start temporary; Using join buffer (flat, BNLH join)
1 PRIMARY t4 hash_ALL NULL #hash#$hj 10 const,test.t2.b 2 Using where; End temporary; Using join buffer (incremental, BNLH join)
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
a b c
1 8 6
SET SESSION join_cache_level = DEFAULT;
SET optimizer_switch=@tmp_optimizer_switch;
DROP TABLE t1,t2,t3,t4;
set @@optimizer_switch=@save_optimizer_switch;

40
mysql-test/t/join_cache.test
View File

@ -3254,5 +3254,45 @@ SET optimizer_switch=@tmp887479_optimizer_switch;
DROP TABLE t1,t2;
--echo #
--echo # Bug #899777: join_cache_level=4 + semijoin=on
--echo #
CREATE TABLE t1 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t1 VALUES (1,8,6), (2,2,8);
CREATE TABLE t2 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t2 VALUES (1,8,6), (2,2,8);
CREATE TABLE t3 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t3 VALUES (1,8,6), (2,2,8);
CREATE TABLE t4 (a int, b int, c int, UNIQUE INDEX idx (a));
INSERT INTO t4 VALUES (1,8,6), (2,2,8);
SET @tmp_optimizer_switch=@@optimizer_switch;
SET SESSION optimizer_switch='semijoin=on';
SET SESSION optimizer_switch='semijoin_with_cache=on';
SET SESSION join_cache_level=1;
EXPLAIN
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
SET SESSION join_cache_level=4;
EXPLAIN
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
SELECT t1.* FROM t1,t2
WHERE (t1.b,t2.b) IN (SELECT t3.b,t4.b FROM t3,t4 WHERE t4.c=t3.b)
AND t1.a = 1;
SET SESSION join_cache_level = DEFAULT;
SET optimizer_switch=@tmp_optimizer_switch;
DROP TABLE t1,t2,t3,t4;
# this must be the last command in the file
set @@optimizer_switch=@save_optimizer_switch;