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| author | unknown <antony@ltantony.rdg.cyberkinetica.homeunix.net> | 2004-10-03 00:20:47 +0100 |
|---|---|---|
| committer | unknown <antony@ltantony.rdg.cyberkinetica.homeunix.net> | 2004-10-03 00:20:47 +0100 |
| commit | a49f5cae9ad6f4de7f5c2d9f8bbdbca270376af6 (patch) | |
| tree | 2b6e8c65a6d12454985b9e836b6d1a7c203750bd /mysql-test/t/lock_multi.test | |
| parent | 799505216ff2fb29a48d7a609f8b392c8c6bb87c (diff) | |
| download | mariadb-git-a49f5cae9ad6f4de7f5c2d9f8bbdbca270376af6.tar.gz | |
Bug#4118: multi-table UPDATE takes WRITE lock on read table
Ensures that WRITE lock is not obtained on all tables referenced.
mysql-test/r/lock_multi.result:
Bug#4118
New test for multi-update locking
mysql-test/r/multi_update.result:
Bug#4118
Fix test
mysql-test/t/lock_multi.test:
Bug#4118
New test for multi-update locking
mysql-test/t/multi_update.test:
Bug#4118
Fix test
sql/sql_parse.cc:
Bug#4118
Split multi-update to its own case statement in sql_parse.cc
sql/sql_update.cc:
Bug#4118
Overview of locking checking:
1. Open and acquire READ lock
2. Check to see which tables need WRITE lock
3. Unlock tables and relock
sql/sql_yacc.yy:
Bug#4118
Split multi-update to its own case statement in sql_parse.cc
Diffstat (limited to 'mysql-test/t/lock_multi.test')
| -rw-r--r-- | mysql-test/t/lock_multi.test | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/mysql-test/t/lock_multi.test b/mysql-test/t/lock_multi.test index 0295fca29e7..e20f8163751 100644 --- a/mysql-test/t/lock_multi.test +++ b/mysql-test/t/lock_multi.test @@ -51,6 +51,30 @@ reap; drop table t1; # +# Test problem when using locks with multi-updates +# It should not block when multi-update is reading on a read-locked table +# + +connection locker; +create table t1 (a int, b int); +create table t2 (c int, d int); +insert into t1 values(1,1); +insert into t1 values(2,2); +insert into t2 values(1,2); +lock table t1 read; +connection writer; +--sleep 2 +send update t1,t2 set c=a where b=d; +connection reader; +--sleep 2 +select c from t2; +connection writer; +reap; +connection locker; +drop table t1; +drop table t2; + +# # Test problem when using locks on many tables and droping a table that # is to-be-locked by another thread # |