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ndb_dbug_lock.test
# The include statement below is a temp one for tests that are yet to #be ported to run with InnoDB, #but needs to be kept for tests that would need MyISAM in future. --source include/force_myisam_default.inc # uses 'send' and 'reap' which seems not supported for emb testing -- source include/not_embedded.inc -- source include/have_ndb.inc # We are using some debug-only features in this test --source include/have_debug.inc --disable_warnings drop table if exists t1; --enable_warnings --connect (another_con, localhost, root,,) --connect (yet_another_con, localhost, root,,) --echo # --echo # Test that alter during lock table aborts with error if --echo # global schema lock already exists --echo # --connection default create table t1 (a int key) engine ndb row_format dynamic; # delay after lock set session debug="+d,sleep_after_global_schema_lock"; --send alter table t1 add column (b int) --sleep 2 --connection another_con lock tables t1 write; --error ER_LOCK_OR_ACTIVE_TRANSACTION alter table t1 add column (c int); # make sure it continues to block --error ER_LOCK_OR_ACTIVE_TRANSACTION alter table t1 add column (c int); --error ER_LOCK_OR_ACTIVE_TRANSACTION alter table t1 add column (c int); unlock tables; --connection default --reap --echo # --echo # Test that alter during lock works without global schema lock --echo # and that an alter done in parallell test serialized --echo # --connection default lock tables t1 write; --echo # delay is still set after lock --send alter table t1 add column (c int) --sleep 2 --echo # issue alter in parallell, which should be hanging waiting on --connection another_con --send alter table t1 add column (d int) --sleep 1 --echo # check thread state which should be: --echo # "Waiting for allowed to take ndbcluster global schema lock" --echo # _not_ "Waiting for ndbcluster global schema lock" --connection yet_another_con select state from information_schema.processlist where info = "alter table t1 add column (d int)"; # wait for alter to complete --connection default --reap unlock tables; --connection another_con --reap show create table t1; --echo # Cleanup --connection default set session debug="-d,"; drop table t1;