#
# Test that histograms are used for optimizing queries that are
# offloaded to a secondary storage engine.
#
CREATE TABLE t1(id INT PRIMARY KEY, x INT NOT NULL) SECONDARY_ENGINE MOCK;
INSERT INTO t1 VALUES
(1, 1), (2, 1), (3, 1), (4, 1), (5, 1),
(6, 1), (7, 1), (8, 1), (9, 2), (10, 2);
ALTER TABLE t1 SECONDARY_LOAD;
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
EXPLAIN SELECT * FROM t1 WHERE x = 1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 1)
EXPLAIN SELECT * FROM t1 WHERE x = 2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 2)
EXPLAIN SELECT * FROM t1 WHERE x = 3;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 3)
ANALYZE TABLE t1 UPDATE HISTOGRAM ON x WITH 10 BUCKETS;
Table	Op	Msg_type	Msg_text
test.t1	histogram	status	Histogram statistics created for column 'x'.
EXPLAIN SELECT * FROM t1 WHERE x = 1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	80.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 1)
EXPLAIN SELECT * FROM t1 WHERE x = 2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	20.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 2)
EXPLAIN SELECT * FROM t1 WHERE x = 3;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 3)
SELECT * FROM t1 WHERE x = 1;
id	x
SELECT * FROM t1 WHERE x = 2;
id	x
SELECT * FROM t1 WHERE x = 3;
id	x
ANALYZE TABLE t1 DROP HISTOGRAM ON x;
Table	Op	Msg_type	Msg_text
test.t1	histogram	status	Histogram statistics removed for column 'x'.
EXPLAIN SELECT * FROM t1 WHERE x = 1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 1)
EXPLAIN SELECT * FROM t1 WHERE x = 2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 2)
EXPLAIN SELECT * FROM t1 WHERE x = 3;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 3)
ANALYZE TABLE t1 UPDATE HISTOGRAM ON x WITH 10 BUCKETS;
Table	Op	Msg_type	Msg_text
test.t1	histogram	status	Histogram statistics created for column 'x'.
EXPLAIN SELECT * FROM t1 WHERE x = 1;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	80.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 1)
EXPLAIN SELECT * FROM t1 WHERE x = 2;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	20.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 2)
EXPLAIN SELECT * FROM t1 WHERE x = 3;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	10	10.00	Using where; Using secondary engine MOCK
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`x` AS `x` from `test`.`t1` where (`test`.`t1`.`x` = 3)
DROP TABLE t1;