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Manual merge of mysql-5.1-bugteam to mysql-trunk-merge.

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Conflicts:

Text conflict in mysql-test/r/partition_innodb.result
Text conflict in sql/field.h
Text conflict in sql/item.h
Text conflict in sql/item_cmpfunc.h
Text conflict in sql/item_sum.h
Text conflict in sql/log_event_old.cc
Text conflict in sql/protocol.cc
Text conflict in sql/sql_select.cc
Text conflict in sql/sql_yacc.yy
This commit is contained in:
Alexey Kopytov
2010-03-20 23:23:42 +03:00
parent daf7f211cd ad6e00e3b2
commit 5d407d0c1a
990 changed files with 938664 additions and 249 deletions
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14
mysql-test/r/partition_range.result
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@@ -1,4 +1,18 @@
drop table if exists t1, t2;
#
# Bug#48229: group by performance issue of partitioned table
#
CREATE TABLE t1 (
a INT,
b INT,
KEY a (a,b)
)
PARTITION BY HASH (a) PARTITIONS 1;
INSERT INTO t1 VALUES (0, 580092), (3, 894076), (4, 805483), (4, 913540), (6, 611137), (8, 171602), (9, 599495), (9, 746305), (10, 272829), (10, 847519), (12, 258869), (12, 929028), (13, 288970), (15, 20971), (15, 105839), (16, 788272), (17, 76914), (18, 827274), (19, 802258), (20, 123677), (20, 587729), (22, 701449), (25, 31565), (25, 230782), (25, 442887), (25, 733139), (25, 851020);
EXPLAIN SELECT a, MAX(b) FROM t1 WHERE a IN (10, 100, 3) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 4 Using where; Using index
DROP TABLE t1;
create table t1 (a int)
partition by range (a)
subpartition by hash(to_seconds(a))