#
# Verify that query results are the same with and without indexes.
#
--source include/have_debug_sync.inc

let $table = "mutex_instances";
let $name_column = NAME;
let $target_name = wait/synch/mutex/sql/MDL_wait::LOCK_wait_status;
let $id_column = LOCKED_BY_THREAD_ID;

--echo TABLE: $table
--echo INDEXES: PK (OBJECT_INSTANCE_BEGIN), KEY (NAME), KEY (LOCKED_BY_THREAD_ID)

--source ../include/idx_compare_setup.inc

--disable_query_log

# Get an object_instance_begin, mutex_name and locked_by_thread_id

--connection con1
# Get MDL read lock
LOCK TABLE t1 READ;

--connection con2

# User1 has a READ LOCK
# User2 waiting for WRITE LOCK
--send LOCK TABLE t1 write;

--connection default

# Wait for the LOCK TABLE t1 write to block
let $wait_condition=
  select count(*) = 1 from performance_schema.events_waits_current
  where event_name = 'wait/lock/metadata/sql/mdl'
  and object_name = 't1';
--source include/wait_condition.inc

--connection default

eval SELECT object_instance_begin, locked_by_thread_id
  INTO @object_instance_begin, @target_id
  FROM performance_schema.mutex_instances
  WHERE name = 'wait/synch/mutex/sql/MDL_wait::LOCK_wait_status'
  AND locked_by_thread_id IS NOT NULL LIMIT 1;

UPDATE performance_schema.threads SET instrumented = 'NO';

--enable_query_log

#DEBUG SELECT @object_instance_begin, @target_thread_id;

--echo
--echo ## Test OBJECT_INSTANCE_BEGIN
let $key_group = 12;
--source ../include/idx_compare_load.inc

--echo
--echo ## Test NAME
let $key_group = 13;
--source ../include/idx_compare_load.inc

--echo
--echo ## Test LOCKED_BY_THREAD_ID
let $key_group = 14;
--source ../include/idx_compare_load.inc

--connection con1

# User1 releases a READ LOCK
# User2 granted a WRITE LOCK
UNLOCK TABLES;

--connection con2

# Complete LOCK TABLE t1 write
--reap
UNLOCK TABLES;

--connection default

--source ../include/idx_compare_cleanup.inc