mariadb/mysql-test/r/analyze_stmt.result

drop table if exists t0,t1,t2,t3;
create table t0 (a int) engine=myisam;
INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int) engine=myisam;
INSERT INTO t1 select * from t0;
# Try a few basic selects to see that r_rows and r_filtered columns work
analyze select * from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	100.00	
analyze select * from t1 where a<5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
analyze select * from t1 where a>100;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	0.00	Using where
# ANALYZE DELETE will delete rows:
analyze delete from t1 where a in (2,3,4);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	NULL	100.00	30.00	Using where
select * from t1;
a
0
1
5
6
7
8
9
drop table t1;
# ANALYZE UPDATE will make updates:
create table t1(a int, b int);
insert into t1 select a,a from t0;
analyze update t1 set b=100+b where a in (6,7,8);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	NULL	100.00	30.00	Using where
select * from t1;
a	b
0	0
1	1
2	2
3	3
4	4
5	5
6	106
7	107
8	108
9	9
drop table t1;
# Check that UNION works
create table t1(a int, b int);
insert into t1 select a,a from t0;
analyze (select * from t1 A where a<5) union (select * from t1 B where a in (5,6));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
2	UNION	B	ALL	NULL	NULL	NULL	NULL	10	10	100.00	20.00	Using where
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	7	NULL	NULL	
analyze (select * from t1 A where a<5) union (select * from t1 B where a in (1,2));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
2	UNION	B	ALL	NULL	NULL	NULL	NULL	10	10	100.00	20.00	Using where
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	5	NULL	NULL	
drop table t1;
drop table t0;
# 
# Try a subquery.
# 
create table t0 (a int, b int);
insert into t0 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
create table t1 (a int, b int);
insert into t1 values (1,1),(2,2),(3,3);
# See .test file for the right values of r_rows and r_filtered.
analyze select a, a in (select t0.b from t0 where t0.b+1=t1.b+1) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	3	100.00	100.00	
2	DEPENDENT SUBQUERY	t0	ALL	NULL	NULL	NULL	NULL	10	3	100.00	33.33	Using where
# Try a subquery that is never executed
analyze select a, a in (select t0.b from t0 where t0.b+1=t1.b+1) from t1 where t1.a > 5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	3	100.00	0.00	Using where
2	DEPENDENT SUBQUERY	t0	ALL	NULL	NULL	NULL	NULL	10	NULL	100.00	NULL	Using where
drop table t0, t1;
#
# Tests for join buffering
#
create table t0 (a int, b int);
insert into t0 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
create table t1 like t0;
insert into t1 select * from t0;
explain select * from t0, t1 where t0.a<5 and t1.a<5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	Using where; Using join buffer (flat, BNL join)
# These should have filtered=50
analyze select * from t0, t1 where t0.a<5 and t1.a<5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where; Using join buffer (flat, BNL join)
explain select * from t0, t1 where t0.a<5 and t1.b=t0.b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	Using where; Using join buffer (flat, BNL join)
# Now, t1 should have filtered=10
analyze select * from t0, t1 where t0.a<5 and t1.b=t0.b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	10.00	Using where; Using join buffer (flat, BNL join)
explain select * from t0, t1 where t0.a<5 and t1.a<5 and t1.b=t0.b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	Using where; Using join buffer (flat, BNL join)
# Now, t1 should have filtered=10
analyze select * from t0, t1 where t0.a<5 and t1.a<5 and t1.b=t0.b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	10.00	Using where; Using join buffer (flat, BNL join)
# TODO: Check what is counted for "range checked for each record".
#
# Test for joins
#
create table t2 (key1 int, key2x int, col1 int, key(key1), key(key2x));
insert into t2 select A.a + 10 *B.a +100 * C.a, 
(A.a + 10 *B.a +100 * C.a)*2,
A.a + 10 *B.a +100 * C.a 
from t0 A, t0 B, t0 C;
# This always has matches, filtered=100%.
analyze select * from t1,t2 where t2.key1=t1.a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	100.00	Using where
1	SIMPLE	t2	ref	key1	key1	5	test.t1.a	1	1	100.00	100.00	
# This shows r_rows=0. It is actually 0.5 (should r_rows be changed to double?)
analyze select * from t1,t2 where t2.key2x=t1.a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	100.00	Using where
1	SIMPLE	t2	ref	key2x	key2x	5	test.t1.a	1	0	100.00	100.00	
select * from t1,t2 where t2.key2x=t1.a;
a	b	key1	key2x	col1
0	0	0	0	0
2	2	1	2	1
4	4	2	4	2
6	6	3	6	3
8	8	4	8	4
# This has t2.filtered=40% (there are 5 values: {0,1,2,3,4}. two of them have mod=0)
analyze select * from t1,t2 where t2.key2x=t1.a and mod(t2.col1,4)=0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	100.00	Using where
1	SIMPLE	t2	ref	key2x	key2x	5	test.t1.a	1	0	100.00	40.00	Using where
drop table t0,t1,t2;
#
# Check non-merged derived tables
#
create table t0 (a int, b int);
insert into t0 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
update t0 set b=b/3;
analyze select * from (select count(*),max(a),b from t0 group by b) T;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	10	4	100.00	100.00	
2	DERIVED	t0	ALL	NULL	NULL	NULL	NULL	10	10	100.00	100.00	Using temporary; Using filesort
drop table t0;
#
# Check ORDER/GROUP BY
#
create table t0 (a int, b int);
insert into t0 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
analyze select count(*),max(a),b from t0 where a<7 group by b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	10	100.00	70.00	Using where; Using temporary; Using filesort
drop table t0;