mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 20:42:30 +01:00
719e64e4a5
FLUSH TABLES WITH READ LOCK fails to properly detect write locked tables when running under low priority updates. The problem is that when trying to aspire a global read lock, the reload_acl_and_cache() function fails to properly check if the thread has a low priority write lock, which later my cause a server crash or deadlock. The solution is to simple check if the thread has any type of the possible exclusive write locks. mysql-test/r/flush.result: Add test case result for Bug#32528 mysql-test/t/flush.test: Add test case for Bug#32528 sql/sql_parse.cc: Although it should not matter under LOCK TABLES, use TL_WRITE_ALLOW_WRITE to emphasize that it should fail in case of any write lock.
74 lines
2.2 KiB
Text
74 lines
2.2 KiB
Text
drop table if exists t1,t2;
|
|
drop database if exists mysqltest;
|
|
create temporary table t1(n int not null primary key);
|
|
create table t2(n int);
|
|
insert into t2 values(3);
|
|
select * from t1;
|
|
n
|
|
3
|
|
flush tables with read lock;
|
|
drop table t2;
|
|
ERROR HY000: Can't execute the query because you have a conflicting read lock
|
|
drop table t2;
|
|
unlock tables;
|
|
create database mysqltest;
|
|
create table mysqltest.t1(n int);
|
|
insert into mysqltest.t1 values (23);
|
|
flush tables with read lock;
|
|
drop database mysqltest;
|
|
select * from mysqltest.t1;
|
|
n
|
|
23
|
|
unlock tables;
|
|
create table t1 (n int);
|
|
flush tables with read lock;
|
|
insert into t1 values (345);
|
|
select * from t1;
|
|
n
|
|
345
|
|
drop table t1;
|
|
create table t1 (c1 int);
|
|
lock table t1 write;
|
|
flush tables with read lock;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
lock table t1 read;
|
|
flush tables with read lock;
|
|
lock table t1 write;
|
|
ERROR HY000: Can't execute the query because you have a conflicting read lock
|
|
lock table t1 read;
|
|
lock table t1 write;
|
|
ERROR HY000: Can't execute the query because you have a conflicting read lock
|
|
unlock tables;
|
|
create table t2 (c1 int);
|
|
create table t3 (c1 int);
|
|
lock table t1 read, t2 read, t3 write;
|
|
flush tables with read lock;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
lock table t1 read, t2 read, t3 read;
|
|
flush tables with read lock;
|
|
unlock tables;
|
|
drop table t1, t2, t3;
|
|
create table t1 (c1 int);
|
|
create table t2 (c1 int);
|
|
lock table t1 write;
|
|
flush tables with read lock;
|
|
insert into t2 values(1);
|
|
unlock tables;
|
|
drop table t1, t2;
|
|
drop table if exists t1, t2;
|
|
set session low_priority_updates=1;
|
|
create table t1 (a int);
|
|
create table t2 (b int);
|
|
lock tables t1 write;
|
|
flush tables with read lock;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
unlock tables;
|
|
lock tables t1 read, t2 write;
|
|
flush tables with read lock;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
unlock tables;
|
|
lock tables t1 read;
|
|
flush tables with read lock;
|
|
unlock tables;
|
|
drop table t1, t2;
|
|
set session low_priority_updates=default;
|