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Merge spetrunia@bk-internal.mysql.com:/home/bk/mysql-4.1

Browse Source 
into mysql.com:/home/psergey/mysql-4.1-bug12915-r2
This commit is contained in:
sergefp@mysql.com
2005-10-18 14:08:50 +04:00
parent d10326a3dc b91173af11
commit d6903c4566
9 changed files with 348 additions and 23 deletions
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59
mysql-test/r/update.result
View File

@@ -263,3 +263,62 @@ test
delete from t1 where count(*)=1;
ERROR HY000: Invalid use of group function
drop table t1;
create table t1 ( a int, index (a) );
insert into t1 values (0),(0),(0),(0),(0),(0),(0),(0);
flush status;
select a from t1 order by a limit 1;
a
0
show status like 'handler_read%';
Variable_name Value
Handler_read_first 1
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
flush status;
update t1 set a=unix_timestamp() order by a limit 1;
show status like 'handler_read%';
Variable_name Value
Handler_read_first 1
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 1
Handler_read_rnd_next 0
flush status;
delete from t1 order by a limit 1;
show status like 'handler_read%';
Variable_name Value
Handler_read_first 1
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
flush status;
delete from t1 order by a desc limit 1;
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 1
Handler_read_rnd_next 9
alter table t1 disable keys;
flush status;
delete from t1 order by a limit 1;
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 1
Handler_read_rnd_next 9
select count(*) from t1;
count(*)
5
drop table t1;

29
mysql-test/t/update.test
View File

@@ -227,4 +227,33 @@ select DATABASE();
delete from t1 where count(*)=1;
drop table t1;
# BUG#12915: Optimize "DELETE|UPDATE ... ORDER BY ... LIMIT n" to use an index
create table t1 ( a int, index (a) );
insert into t1 values (0),(0),(0),(0),(0),(0),(0),(0);
flush status;
select a from t1 order by a limit 1;
show status like 'handler_read%';
flush status;
update t1 set a=unix_timestamp() order by a limit 1;
show status like 'handler_read%';
flush status;
delete from t1 order by a limit 1;
show status like 'handler_read%';
flush status;
delete from t1 order by a desc limit 1;
show status like 'handler_read%';
alter table t1 disable keys;
flush status;
delete from t1 order by a limit 1;
show status like 'handler_read%';
select count(*) from t1;
drop table t1;
# End of 4.1 tests