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Merge timka@10.100.64.80:/home/timka/mysql/src/4.1-bug-21787

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into  dl145s.mysql.com:/data/tkatchaounov/5.0-bug-21787


mysql-test/r/limit.result:
  Auto merged
mysql-test/t/limit.test:
  Auto merged
sql/sql_select.cc:
  Adjust the fix for BUG#21787 for 5.0
This commit is contained in:
unknown
2006-09-01 14:29:27 +02:00
parent 70b7378898 b017caefbd
commit 495edb59bd
3 changed files with 38 additions and 7 deletions
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14
mysql-test/r/limit.result
View File

@ -76,3 +76,17 @@ a
a
1
drop table t1;
create table t1 (a int);
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where; Using temporary
select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
c
7
explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where; Using temporary
select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
c
28

10
mysql-test/t/limit.test
View File

@ -60,4 +60,14 @@ select 1 as a from t1 union all select 1 from dual limit 1;
(select 1 as a from t1) union all (select 1 from dual) limit 1;
drop table t1;
#
# Bug #21787: COUNT(*) + ORDER BY + LIMIT returns wrong result
#
create table t1 (a int);
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
# End of 4.1 tests