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Bug #21019: First result of SELECT COUNT(*) different than consecutive runs

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Correct merge
This commit is contained in:
unknown 2006-07-26 18:18:34 +03:00
parent 048fbb845d
commit 8c92143b4b
1 changed files with 26 additions and 26 deletions
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52
mysql-test/r/select.result
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@ -2736,6 +2736,32 @@ SELECT i='1e+01',i=1e+01, i in (1e+01,1e+01), i in ('1e+01','1e+01') FROM t1;
i='1e+01' i=1e+01 i in (1e+01,1e+01) i in ('1e+01','1e+01')
0 1 1 1
DROP TABLE t1;
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1,1), (2,1), (4,10);
CREATE TABLE t2 (a int PRIMARY KEY, b int, KEY b (b));
INSERT INTO t2 VALUES (1,NULL), (2,10);
ALTER TABLE t1 ENABLE KEYS;
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index b b 5 NULL 2 Using index
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
a b a b
1 NULL 1 1
1 NULL 2 1
1 NULL 4 10
2 10 4 10
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index b b 5 NULL 2 Using index
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
a b a b
1 NULL 1 1
1 NULL 2 1
1 NULL 4 10
2 10 4 10
DROP TABLE IF EXISTS t1,t2;
CREATE TABLE t1 (
K2C4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '',
K4N4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '0000',
@ -3125,32 +3151,6 @@ select count(*)
from t1 inner join (t2 right join t3 on t2.id = t3.b_id) on t1.id = t3.a_id;
count(*)
6
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1,1), (2,1), (4,10);
CREATE TABLE t2 (a int PRIMARY KEY, b int, KEY b (b));
INSERT INTO t2 VALUES (1,NULL), (2,10);
ALTER TABLE t1 ENABLE KEYS;
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index b b 5 NULL 2 Using index
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
a b a b
1 NULL 1 1
1 NULL 2 1
1 NULL 4 10
2 10 4 10
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index b b 5 NULL 2 Using index
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
a b a b
1 NULL 1 1
1 NULL 2 1
1 NULL 4 10
2 10 4 10
DROP TABLE IF EXISTS t1,t2;
drop table t1,t2,t3;
create table t1 (a int);
create table t2 (b int);