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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 10.00 100.00 100.00
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 10.00 100.00 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 10.00 100.00 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 10.00 100.00 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 10.00 100.00 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 10.00 100.00 50.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 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 10.00 100.00 50.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 5.00 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 3.00 100.00 100.00
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 3.00 100.00 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 3.00 100.00 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 10.00 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 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 10.00 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 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 10.00 100.00 50.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 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 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref key1 key1 5 test.t1.a 1 1.00 100.00 100.00
# 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 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0.50 100.00 100.00
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 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0.50 100.00 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 4.00 100.00 100.00
2 DERIVED t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 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 10.00 100.00 70.00 Using where; Using temporary; Using filesort
drop table t0;
#
# Check multi-table UPDATE/DELETE.
#
create table t0 (a int, b int);
create table t1 (a int, b int);
insert into t0 values (0,0),(2,2),(4,4), (8,8);
insert into t1 values (0,0),(2,2), (6,6);
analyze select * from t0,t1 where t0.a=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 3 3.00 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where; Using join buffer (flat, BNL join)
analyze update t0,t1 set t1.b=5555 where t0.a=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 3 3.00 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where
select * from t1;
a b
0 5555
2 5555
6 6
analyze delete t1 from t1, t0 where t0.a=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 3 3.00 100.00 100.00
1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where
select * from t1;
a b
6 6
drop table t0, t1;
#
# MDEV-6393: ANALYZE SELECT crashes in Explain_query::print_explain with a non-existing column
#
create table t1 (i int);
insert into t1 values (1),(2);
analyze select a from t1;
ERROR 42S22: Unknown column 'a' in 'field list'
analyze delete from t1 where a=2;
ERROR 42S22: Unknown column 'a' in 'where clause'
analyze update t1 set a=2;
ERROR 42S22: Unknown column 'a' in 'field list'
create table t2 like t1;
insert into t2 select * from t1;
analyze update t2,t1 set t2.i=5 where t2.a=t1.a;
ERROR 42S22: Unknown column 't2.a' in 'where clause'
analyze delete t1 from t2,t1 where t2.a=t1.a;
ERROR 42S22: Unknown column 't2.a' in 'where clause'
drop table t1, t2;
#
# MDEV-6395: ANALYZE UPDATE/DELETE with impossible where does not produce any output
#
create table t1 (a int, b int, key(a));
insert into t1 values (1,1),(2,2),(3,3),(4,4),(5,5);
analyze delete from t1 where 1 > 2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
analyze delete from t1 where a > 30 and a < 10;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
analyze update t1 set b=12345 where 1 > 2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
analyze update t1 set b=12345 where a > 30 and a < 10;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
drop table t1;
#
# MDEV-6398: ANALYZE UPDATE does not populate r_rows
#
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
analyze update t1 set i=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 4 4.00 100.00 100.00
drop table t1;
#
# Check ANALYZE SELECT INTO
#
create table t1 (i int);
insert into t1 values (1);
analyze select * from t1 into @var;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 100.00 NULL
Warnings:
Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
drop table t1;
#
# MDEV-6394: ANALYZE DELETE .. RETURNING fails with ERROR 2027 Malformed packet
#
create table t1 (i int);
analyze delete from t1 returning *;
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 0 0.00 100.00 100.00
drop table t1;
#
# MDEV-6396: ANALYZE INSERT/REPLACE is accepted, but does not produce a plan
#
create table t1 (a int primary key, b int);
analyze insert into t1 values (1,1);
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL 100.00 100.00 NULL
select * from t1;
a b
1 1
analyze replace t1 values (1,2);
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL 100.00 100.00 NULL
select * from t1;
a b
1 2
drop table t1;
#
# MDEV-6400 "ANALYZE SELECT ... INTO @var" doesn't set @var
#
create table t1(a int);
insert into t1 values (1),(2);
analyze select a from t1 where a <2 into @var;
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 2 2.00 100.00 50.00 Using where
Warnings:
Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
analyze select a from t1 into @var;
ERROR 42000: Result consisted of more than one row
analyze insert into t1 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 2 2.00 100.00 100.00 Using temporary
analyze select * into outfile '../../tmp/data1.tmp' 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 4 4.00 100.00 100.00
drop table t1;
#
# MDEV-7024: Assertion `! is_set()' failed in
# Diagnostics_area::set_eof_status on executing ANALYZE SELECT via PS
#
create table t1(a int);
prepare stmt from "analyze select * from t1";
execute stmt;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
drop table t1;
#
# MDEV-7674: ANALYZE shows r_rows=0
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, key(a));
insert into t2 values (0),(1);
analyze select * from t1 straight_join t2 force index(a) where t2.a=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 10.00 100.00 100.00 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 2 0.20 100.00 100.00 Using index
drop table t1,t2;
#
# MDEV-8063: Unconditional ANALYZE DELETE does not delete rows
#
create table t1 (i int);
insert into t1 values (1),(2);
analyze delete from t1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL 2 NULL NULL NULL Deleting all rows
select * from t1;
i
insert into t1 values (1),(2);
explain delete from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL 2 Deleting all rows
select * from t1;
i
1
2
drop table t1;
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