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Added more tests for new UPDATE ... ORDER BY ... LIMIT optimization

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monty@mysql.com
2005-10-25 02:27:40 +03:00
parent ea3ea9ed10
commit 3e653fb922
15 changed files with 170 additions and 182 deletions
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31
mysql-test/r/update.result
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@ -263,8 +263,8 @@ 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);
create table t1 ( a int, b int default 0, index (a) );
insert into t1 (a) values (0),(0),(0),(0),(0),(0),(0),(0);
flush status;
select a from t1 order by a limit 1;
a
@ -278,15 +278,16 @@ 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;
update t1 set a=9999 order by a limit 1;
update t1 set b=9999 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
Handler_read_rnd 2
Handler_read_rnd_next 9
flush status;
delete from t1 order by a limit 1;
show status like 'handler_read%';
@ -318,7 +319,21 @@ Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 1
Handler_read_rnd_next 9
select count(*) from t1;
count(*)
5
select * from t1;
a b
0 0
0 0
0 0
0 0
0 0
update t1 set a=a+10,b=1 order by a limit 3;
update t1 set a=a+11,b=2 order by a limit 3;
update t1 set a=a+12,b=3 order by a limit 3;
select * from t1 order by a;
a b
11 2
21 2
22 3
22 3
23 3
drop table t1;