database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-24 11:21:21 +03:00
Code Activity

Merge adventure.(none):/home/thek/Development/cpp/bug28249/my50-bug28249

Browse Source 
into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime
This commit is contained in:
thek@adventure.(none)
2007-07-12 15:30:34 +02:00
parent 392b283f3d 8ee7e48de8
commit 2a5e7fe592
5 changed files with 232 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
mysql-test/r/query_cache.result
View File

@@ -1467,3 +1467,42 @@ insert into t1 values ('c');
a
drop table t1;
set GLOBAL query_cache_size= default;
Bug#28249 Query Cache returns wrong result with concurrent insert/ certain lock
set GLOBAL query_cache_type=1;
set GLOBAL query_cache_limit=10000;
set GLOBAL query_cache_min_res_unit=0;
set GLOBAL query_cache_size= 100000;
flush tables;
drop table if exists t1, t2;
create table t1 (a int);
create table t2 (a int);
insert into t1 values (1),(2),(3);
Locking table T2 with a write lock.
lock table t2 write;
Select blocked by write lock.
select *, (select count(*) from t2) from t1;;
Sleeing is ok, because selecting should be done very fast.
Inserting into table T1.
insert into t1 values (4);
Unlocking the tables.
unlock tables;
Collecting result from previously blocked select.
Next select should contain 4 rows, as the insert is long finished.
select *, (select count(*) from t2) from t1;
a (select count(*) from t2)
1 0
2 0
3 0
4 0
reset query cache;
select *, (select count(*) from t2) from t1;
a (select count(*) from t2)
1 0
2 0
3 0
4 0
drop table t1,t2;
set GLOBAL query_cache_type=default;
set GLOBAL query_cache_limit=default;
set GLOBAL query_cache_min_res_unit=default;
set GLOBAL query_cache_size=default;