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Merge

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This commit is contained in:
Igor Babaev
2010-12-25 18:54:14 -08:00
parent 1eb5e0e603 d9a81475c7
commit 1eb21dc4be
3 changed files with 82 additions and 3 deletions
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35
mysql-test/r/join_cache.result
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@@ -6087,4 +6087,39 @@ pk a pk a
50 ee 14 ee
SET SESSION join_cache_level = DEFAULT;
DROP TABLE t1,t2;
#
# Bug #694092: incorrect detection of index only pushdown conditions
#
CREATE TABLE t1 (
f1 varchar(10), f3 int(11), PRIMARY KEY (f3)
);
INSERT INTO t1 VALUES ('y',1),('or',5);
CREATE TABLE t2 (
f3 int(11), f2 varchar(1024), f4 varchar(10), PRIMARY KEY (f3)
);
INSERT INTO t2 VALUES (6,'RPOYT','y'),(10,'JINQE','m');
SET SESSION join_cache_level = 1;
SET SESSION optimizer_switch = 'index_condition_pushdown=off';
EXPLAIN
SELECT * FROM t1,t2
WHERE t1.f1 = t2.f4 AND (t1.f3 = 1 AND t2.f3 = 4 OR t1.f3 = 2 AND t2.f3 = 6);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using where; Using MRR
1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 Using where; Using MRR; Using join buffer (flat, BNL join)
SELECT * FROM t1,t2
WHERE t1.f1 = t2.f4 AND (t1.f3 = 1 AND t2.f3 = 4 OR t1.f3 = 2 AND t2.f3 = 6);
f1 f3 f3 f2 f4
SET SESSION optimizer_switch = 'index_condition_pushdown=on';
EXPLAIN
SELECT * FROM t1,t2
WHERE t1.f1 = t2.f4 AND (t1.f3 = 1 AND t2.f3 = 4 OR t1.f3 = 2 AND t2.f3 = 6);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR
1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using where; Using MRR; Using join buffer (flat, BNL join)
SELECT * FROM t1,t2
WHERE t1.f1 = t2.f4 AND (t1.f3 = 1 AND t2.f3 = 4 OR t1.f3 = 2 AND t2.f3 = 6);
f1 f3 f3 f2 f4
SET SESSION join_cache_level = DEFAULT;
SET SESSION optimizer_switch = DEFAULT;
DROP TABLE t1,t2;
set @@optimizer_switch=@save_optimizer_switch;