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Merge 5.1-bugteam (local) -> 5.1-bugteam.

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This commit is contained in:
Sergey Vojtovich 2009-02-12 14:12:40 +04:00
commit a1d1f1eb85
3 changed files with 34 additions and 1 deletions
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19
mysql-test/r/merge.result
View file

@ -2041,4 +2041,23 @@ EXPLAIN SELECT COUNT(*) FROM t4;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
DROP TABLE t1, t2, t3, t4;
CREATE TABLE t1(a INT, KEY(a));
INSERT INTO t1 VALUES(0),(1),(2),(3),(4);
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
CREATE TABLE m1(a INT, KEY(a)) ENGINE=MERGE UNION=(t1);
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
CARDINALITY
5
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
CARDINALITY
5
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
CARDINALITY
5
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
CARDINALITY
5
DROP TABLE t1, m1;
End of 5.1 tests

13
mysql-test/t/merge.test
View file

@ -1435,4 +1435,17 @@ EXPLAIN SELECT COUNT(*) FROM t1;
EXPLAIN SELECT COUNT(*) FROM t4;
DROP TABLE t1, t2, t3, t4;
#
# BUG#39185 - Cardinality for merge tables calculated incorrectly.
#
CREATE TABLE t1(a INT, KEY(a));
INSERT INTO t1 VALUES(0),(1),(2),(3),(4);
ANALYZE TABLE t1;
CREATE TABLE m1(a INT, KEY(a)) ENGINE=MERGE UNION=(t1);
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
SELECT CARDINALITY FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_SCHEMA='test' AND TABLE_NAME='m1';
DROP TABLE t1, m1;
--echo End of 5.1 tests

3
storage/myisammrg/myrg_open.c
View file

@ -428,10 +428,11 @@ int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,
if (!m_info->rec_per_key_part)
{
if(!(m_info->rec_per_key_part= (ulong*)
my_malloc(key_parts * sizeof(long), MYF(MY_WME|MY_ZEROFILL))))
my_malloc(key_parts * sizeof(long), MYF(MY_WME))))
goto err; /* purecov: inspected */
errpos= 1;
}
bzero((char*) m_info->rec_per_key_part, key_parts * sizeof(long));
}
/* Add MyISAM table info. */