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MDEV-28820 MyISAM wrong server status flags

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MyISAM tables no longer take transactional metadata locks
unless there already is an active transaction.
This commit is contained in:
Sergei Golubchik
2023-10-16 17:37:16 +02:00
parent f293b2b211
commit 81c88ab7cd
9 changed files with 98 additions and 13 deletions
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43
mysql-test/main/mdl.test
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@ -80,3 +80,46 @@ connection default;
disconnect locker;
DROP TABLE t1,t3;
--enable_service_connection
--echo #
--echo # MDEV-28820 MyISAM wrong server status flags
--echo #
# MyISAM alone doesn't start a transaction or takes transactional MDL
create table t1 (a int);
set autocommit=0;
select @@in_transaction;
select * from t1;
select @@in_transaction;
connect foo,localhost,root;
drop table t1;
connection default;
set autocommit=1;
# MyISAM in a transaction (started by InnoDB) takes transactional MDL all right
create table t1 (a int);
create table t2 (b int) engine=innodb;
set autocommit=0;
select @@in_transaction;
select * from t2;
select @@in_transaction;
select * from t1;
connection foo;
send drop table t1;
connection default;
let $wait_condition=
select count(*) > 0 from information_schema.processlist
where state = "Waiting for table metadata lock";
--source include/wait_condition.inc
select * from t1;
commit;
connection foo;
reap;
disconnect foo;
connection default;
set autocommit=default;
drop table t2;
--echo #
--echo # End of 10.4 tests
--echo #