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--source include/have_innodb.inc
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int);
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
create table t2 (
a int,
b int,
key (a)
);
insert into t2 select A.a*1000 + B.a, A.a*1000 + B.a from t0 A, t1 B;
--echo #
--echo # Try an UPDATE that uses filesort:
--echo #
explain
update t2 set b=b+1 order by b limit 5;
explain format=json
update t2 set b=b+1 order by b limit 5;
--source include/analyze-format.inc
analyze format=json
update t2 set b=b+1 order by b limit 5;
--echo #
--echo # Try an UPDATE that uses buffering:
--echo #
explain
update t2 set a=a+1 where a<10;
explain format=json
update t2 set a=a+1 where a<10;
--source include/analyze-format.inc
analyze format=json
update t2 set a=a+1 where a<10;
--echo #
--echo # Try a DELETE that uses filesort:
--echo #
explain
delete from t2 order by b limit 5;
explain format=json
delete from t2 order by b limit 5;
--source include/analyze-format.inc
analyze format=json
delete from t2 order by b limit 5;
--echo #
--echo # Try a SELECT with QEP in form: filesort { tmp_table { join } }
--echo #
explain
select * from t0,t2 where t2.a=t0.a order by t2.b limit 4;
explain format=json
select * from t0,t2 where t2.a=t0.a order by t2.b limit 4;
--source include/analyze-format.inc
analyze format=json
select * from t0,t2 where t2.a=t0.a order by t2.b limit 4;
--echo #
--echo # Try a SELECT with QEP in form: join { filesort { table0 }, table2 }
--echo #
explain
select * from t0,t2 where t2.a=t0.a order by t0.a limit 4;
explain format=json
select * from t0,t2 where t2.a=t0.a order by t0.a limit 4;
--source include/analyze-format.inc
analyze format=json
select * from t0,t2 where t2.a=t0.a order by t0.a limit 4;
drop table t2;
create table t2 (
a int,
b int,
c int
);
insert into t2
select
a.a+10*b.a+100*c.a,
b.a+10*c.a,
c.a
from t0 a, t0 b, t0 c;
--source include/analyze-format.inc
analyze format=json
select MAX(b) from t2 where mod(a,2)=0 group by c;
drop table t2;
--echo #
--echo # MDEV-8282: crash in filesort() with simple ordered delete
--echo #
create table t3(a int) engine=innodb;
delete from t3 order by a;
--echo # EXPLAIN thinks it will use delete_all_rows():
explain
delete from t3 order by a;
--echo # ANALYZE shows that delete_all_rows() didn't work and we deleted rows
--echo # one-by-one:
analyze
delete from t3 order by a;
drop table t3;
--echo #
--echo # A test for duplicate_removal()
--echo #
create table t3 (a int, b int);
insert into t3 select a, 123 from t0;
--source include/analyze-format.inc
analyze format=json
select distinct max(t3.b) Q from t0, t3 where t0.a=t3.a group by t0.a order by null;
--echo #
--echo # A query with two filesort calls:
--echo # - first is needed to do group-by-group grouping to calculate COUNT(DISTINCT)
--echo # - the second is need to produce ORDER BY.
--echo # (see MDEV-7836 for description of the query plan)
create table t5 (a int , b int) ;
create table t6 like t5 ;
create table t7 like t5 ;
insert into t5 values (0, 100), (1, 2), (1, 3), (2, 2), (2, 7),
(2, -1), (3, 10);
insert into t6 values (0, 0), (1, 1), (2, 1), (3, 1), (4, 1);
insert into t7 values (3, 3), (2, 2), (1, 1);
--echo # TODO: This ANALYZE output doesn't make it clear what is used for what.
--source include/analyze-format.inc
analyze format=json
select count(distinct t5.b) as sum from t5, t6
where t5.a=t6.a and t6.b > 0 and t5.a <= 5
group by t5.a order by sum limit 1;
explain format=json
select count(distinct t5.b) as sum from t5, t6
where t5.a=t6.a and t6.b > 0 and t5.a <= 5
group by t5.a order by sum limit 1;
drop table t5,t6,t7;
drop table t3;
--echo #
--echo # Tabular ANALYZE must get its data from execution tracker (and not from
--echo # the query plan)
--echo #
CREATE TABLE t2(
col1 int,
col2 int,
UNIQUE INDEX idx (col1, col2)) engine=myisam;
INSERT INTO t2(col1, col2) VALUES
(1,20),(2,19),(3,18),(4,17),(5,16),(6,15),(7,14),(8,13),(9,12),(10,11),
(11,10),(12,9),(13,8),(14,7),(15,6),(16,5),(17,4),(18,3),(19,2),(20,1);
flush status;
explain
select col1 f1, col2 f2, col1 f3 from t2 group by f1;
analyze
select col1 f1, col2 f2, col1 f3 from t2 group by f1;
--source include/analyze-format.inc
analyze format=json
select col1 f1, col2 f2, col1 f3 from t2 group by f1;
drop table t2;
drop table t0,t1;
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