#
# Bug#28624707: MYSQL TRYING TO OFFLOAD QUERIES TO SECONDARY ENGINE
#               AFTER PLUGIN UNINSTALL
#
SELECT PLUGIN_STATUS FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME='MOCK';
PLUGIN_STATUS
ACTIVE
CREATE TABLE t(x INT) SECONDARY_ENGINE MOCK;
INSERT INTO t VALUES (1);
ALTER TABLE t SECONDARY_LOAD;
Should have "secondary engine" in the plan.
ANALYZE TABLE t;
Table	Op	Msg_type	Msg_text
test.t	analyze	status	OK
EXPLAIN SELECT * FROM t;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t`.`x` AS `x` from `test`.`t`
SELECT * FROM t;
x
# The plugin cannot be unloaded because there are still references
# to it (from the table cache). Will give a warning about that.
UNINSTALL PLUGIN mock;
Warnings:
Warning	1620	Plugin is busy and will be uninstalled on shutdown
SELECT PLUGIN_STATUS FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME='MOCK';
PLUGIN_STATUS
DELETED
# Should not have "secondary engine" in the plan.
EXPLAIN SELECT * FROM t;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`t`.`x` AS `x` from `test`.`t`
SELECT * FROM t;
x
1
DROP TABLE t;
SELECT PLUGIN_STATUS FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME='MOCK';
PLUGIN_STATUS