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Fix bug #9593 "The combination of COUNT, DISTINCT and CONCAT seems to lock the

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server"
Bug appears only on Windows platform. Freeing memory in 
TMP_TABLE_PARAM::cleanup() allocated by new Copy_fields[0] in 
setup_copy_fields() results in memory destruction. In test IF used instead 
of CONCAT because IF have more stable crash.
This commit is contained in:
evgen@moonbone.local
2005-05-30 03:32:50 +04:00
parent f8cb00640f
commit 077086cd96
3 changed files with 29 additions and 6 deletions
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6
mysql-test/r/count_distinct.result
View File

@@ -60,3 +60,9 @@ count(distinct a)
1
1
drop table t1;
create table t1 (f1 int, f2 int);
insert into t1 values (0,1),(1,2);
select count(distinct if(f1,3,f2)) from t1;
count(distinct if(f1,3,f2))
2
drop table t1;

12
mysql-test/t/count_distinct.test
View File

@@ -63,3 +63,15 @@ create table t1 (a char(3), b char(20), primary key (a, b));
insert into t1 values ('ABW', 'Dutch'), ('ABW', 'English');
select count(distinct a) from t1 group by b;
drop table t1;
#
# Bug #9593 "The combination of COUNT, DISTINCT and CONCAT
# seems to lock the server"
# Bug appears only on Windows system
#
create table t1 (f1 int, f2 int);
insert into t1 values (0,1),(1,2);
select count(distinct if(f1,3,f2)) from t1;
drop table t1;