path: root/mysql-test/main/derived_split_innodb.test

--source include/have_innodb.inc
--source include/default_optimizer_switch.inc
--source include/have_sequence.inc

SET @save_innodb_stats_persistent=@@GLOBAL.innodb_stats_persistent;
SET GLOBAL innodb_stats_persistent=0;

--echo #
--echo # MDEV-16917: do not use splitting for derived with join cache
--echo #

CREATE TABLE t1 (
  n1 int(10) NOT NULL,
  n2 int(10) NOT NULL,
  c1 char(1) NOT NULL,
  KEY c1 (c1),
  KEY n1_c1_n2 (n1,c1,n2)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (0, 2, 'a'), (1, 3, 'a');
insert into t1 select seq+1,seq+2,'c' from seq_1_to_1000;

ANALYZE TABLE t1;

Let $q=
SELECT t1.n1 FROM t1, (SELECT n1, n2 FROM t1 WHERE c1 = 'a' GROUP BY n1) as t
  WHERE t.n1 = t1.n1 AND t.n2 = t1.n2 AND c1 = 'a' GROUP BY n1;

eval EXPLAIN $q;
eval $q;

DROP TABLE t1;

--echo #
--echo # MDEV-17211: splittable materialized derived joining 3 tables with
--echo #             GROUP BY list containing fields from 2 of them
--echo #

CREATE TABLE t1 (
  id1 int, i1 int, id2 int,
  PRIMARY KEY (id1), KEY (i1), KEY (id2)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,1,1);

CREATE TABLE t2 (id2 int, i2 int) ENGINE=InnoDB;
INSERT INTO t2  VALUES (1, 1);

CREATE TABLE t3 (id3 int, i3 int, PRIMARY KEY (id3)) ENGINE=InnoDB;
INSERT INTO t3 VALUES (1,1);

let $q=
SELECT id3
  FROM (SELECT t3.id3, t2.i2, t1.id2  FROM t3,t1,t2
          WHERE t3.i3=t1.id1 AND t2.id2=t1.id2
            GROUP BY t3.id3, t1.id2) AS t,
        t2
    WHERE t2.id2=t.id2;

eval EXPLAIN $q;
eval $q;

DROP TABLE t1,t2,t3;

--echo #
--echo # Bug mdev-17381: equi-join of derived table with join_cache_level=4
--echo #

CREATE TABLE t1 (
  id int NOT NULL,
  amount decimal DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;

CREATE TABLE t2 (
  id int NOT NULL,
  name varchar(50) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;

INSERT INTO t1 VALUES
(1, 10.0000), (2, 20.0000), (3, 30.0000), (4, 40.0000),
(5, NULL), (6, NULL), (7, 70.0000), (8, 80.0000);

INSERT INTO t2 VALUES
(1,'A'), (2,'B'), (3,'C'), (4,'D'), (5, NULL), (6, NULL),
(7,'E'), (8,'F'), (9,'G'), (10,'H'), (11, NULL), (12, NULL);

set join_cache_level=4;

let $q=
SELECT t2.id,t2.name,t.total_amt
  FROM  t2
        LEFT JOIN
        (SELECT id, sum(amount) total_amt FROM t1 GROUP BY id) AS t
        ON t2.id=t.id
  WHERE t2.id < 3;

eval $q;
eval EXPLAIN $q;

set join_cache_level=default;

DROP TABLE t1,t2;

--echo #
--echo # Bug mdev-18467: join of grouping view and a base table as inner operand
--echo #                 of left join with on condition containing impossible range
--echo #

create table t1 (f1 int, f2 int, key(f2)) engine=InnoDB;
insert into t1 values (3,33), (7,77), (1,11);

create table t2 (f1 int, f2 int, primary key (f1)) engine=InnoDB;
insert into t2 values (3,33), (9,99), (1,11);

create view v1 as
  select f1, max(f2) as f2 from t2 group by f1;

let $q=
select t.f2
  from t1
       left join
       (v1 join t1 as t on v1.f1=t.f1 and t.f2 = null)
       on t1.f1=t.f1;

eval $q;
eval explain $q;
eval set statement optimizer_switch='split_materialized=off' for explain $q;

drop view v1;

drop table t1,t2;

--echo #
--echo #  MDEV-23723: Crash when test_if_skip_sort_order() is checked for derived table subject to split
--echo #
CREATE TABLE t1 (a INT, b INT, KEY (a), KEY (a,b)) ENGINE=InnoDB;
CREATE TABLE t2 (c INT, KEY (c)) ENGINE=InnoDB;

SELECT * FROM t1 t1a JOIN t1 t1b;

INSERT INTO t2 VALUES (1),(2);
INSERT INTO t1 VALUES (1,2),(3,4),(5,6),(7,8),(9,10),(11,12);

let $query=
EXPLAIN
SELECT *
FROM
  t1 JOIN
  (SELECT t1.a, t1.b FROM t1, t2 WHERE t1.b = t2.c GROUP BY t1.a, t1.b) as dt
WHERE
  t1.a = dt.a;

eval set statement optimizer_switch='split_materialized=off' for $query;
eval set statement optimizer_switch='split_materialized=on' for  $query;

DROP TABLE t1, t2;

--echo #
--echo # Bug mdev-25714: usage non-splitting covering index is cheaper than
--echo #                 usage of the best splitting index for one group
--echo #

create table t1 (
  id int not null, itemid int not null, index idx (itemid)
) engine=innodb;
insert into t1 values (1, 2), (2,2), (4,2), (4,2), (0,3), (3,3);
create table t2 (id int not null) engine=innodb;
insert into t2 values (2);
create table t3 (
  id int not null, itemid int not null, userid int not null, primary key (id),
  index idx1 (userid, itemid), index idx2 (itemid)
) engine innodb;
insert into t3 values (1,1,1), (2,1,1), (3,2,1), (4,2,1), (5,3,1);
set use_stat_tables='never';
set optimizer_use_condition_selectivity=1;
analyze table t1,t2,t3;

let $q=
select t1.id, t1.itemid, dt.id, t2.id
  from t1,
  (select itemid, max(id) as id from t3 where userid = 1 group by itemid) dt,
  t2
    where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;

set optimizer_switch='split_materialized=on';
eval explain $q;
eval $q;

set optimizer_switch='split_materialized=off';
eval explain $q;
eval $q;

drop table t1,t2,t3;
set optimizer_switch='split_materialized=default';
set use_stat_tables=default;
set optimizer_use_condition_selectivity=default;

--echo #
--echo # MDEV-26337: subquery with groupby and ROLLUP returns incorrect results 
--echo #  (The testcase is taken from testcase for MDEV-13389 due to it being
--echo #   much smaller)
--echo #

create table t3 (a int, b int, c char(127), index idx_b(b)) engine=myisam;
insert into t3 values
(8,11,'aa'), (5,15,'cc'), (1,14,'bb'), (2,12,'aa'), (7,17,'cc'),
(7,18,'aa'), (2,11,'aa'), (7,10,'bb'), (3,11,'dd'), (4,12,'ee'),
(5,14,'dd'), (9,12,'ee');
create table t4 (a int, b int, c char(127), index idx(a,c)) engine=myisam;
insert into t4 values
(7,10,'cc'), (1,20,'aa'), (2,23,'bb'), (7,18,'cc'), (1,30,'bb'),
(4,71,'xx'), (3,15,'aa'), (7,82,'aa'), (8,12,'dd'), (4,15,'aa'),
(11,33,'yy'), (10,42,'zz'), (4,53,'xx'), (10,17,'yy'), (7,12,'cc'),
(8,20,'dd'), (7,32,'bb'), (1,50,'aa'), (3,40,'bb'), (3,77,'aa');
insert into t4 select a+10, b+10, concat(c,'f') from t4;
analyze table t3,t4;

--echo # This should use a plan with LATERAL DERIVED:
explain select t3.a,t3.c,t.max,t.min
from t3 join
(select a, c, max(b) max, min(b) min from t4 group by a,c) t
on t3.a=t.a and t3.c=t.c
where t3.b > 15;

--echo # ... and if one adds WITH ROLLUP, then LATERAL DERIVED is no longer used:
explain select t3.a,t3.c,t.max,t.min
from t3 join
(select a, c, max(b) max, min(b) min from t4 group by a,c with rollup) t
on t3.a=t.a and t3.c=t.c
where t3.b > 15;

drop table t3, t4;

--echo # End of 10.3 tests


--echo #
--echo # MDEV-26301: Split optimization refills temporary table too many times
--echo #

# 5 values
create table t1(a int, b int);
insert into t1 select seq,seq from seq_1_to_5;

# 5 value groups of size 2 each
create table t2(a int, b int, key(a));
insert into t2
select A.seq,B.seq from seq_1_to_25 A, seq_1_to_2 B;

# 5 value groups of size 3 each
create table t3(a int, b int, key(a));
insert into t3
select A.seq,B.seq from seq_1_to_5 A, seq_1_to_3 B;

analyze table t1,t2,t3 persistent for all;

explain
select * from
  (t1 left join t2 on t2.a=t1.b) left join t3 on t3.a=t1.b;

# Now, create tables for Groups.

create table t10 (
  grp_id int,
  col1 int,
  key(grp_id)
);

# 100 groups of 100 values each
insert into t10
select
  A.seq,
  B.seq
from
  seq_1_to_100 A,
  seq_1_to_100 B;

# and X10 multiplier

create table t11 (
  col1 int,
  col2 int
);
insert into t11
select A.seq, A.seq from seq_1_to_10 A;

analyze table t10,t11 persistent for all;

let $q1=
select * from
  (
    (t1 left join t2 on t2.a=t1.b)
    left join t3 on t3.a=t1.b
  ) left join (select grp_id, count(*)
               from t10 left join t11 on t11.col1=t10.col1
               group by grp_id) T on T.grp_id=t1.b;

eval
explain $q1;

--echo # The important part in the below output is:
--echo #        "lateral": 1,
--echo #        "query_block": {
--echo #          "select_id": 2,
--echo #          "r_loops": 5,  <-- must be 5, not 30.
--source include/analyze-format.inc

eval
analyze format=json $q1;

create table t21 (pk int primary key);
insert into t21 values (1),(2),(3);

create table t22 (pk int primary key);
insert into t22 values (1),(2),(3);

# Same as above but throw in a couple of const tables.
explain
select * from
  t21, t22,
  (
    (t1 left join t2 on t2.a=t1.b)
    left join t3 on t3.a=t1.b
  ) left join (select grp_id, count(*)
               from t10 left join t11 on t11.col1=t10.col1
               group by grp_id) T on T.grp_id=t1.b
where
  t21.pk=1 and t22.pk=2;

explain
select * from
  t21,
  (
    (t1 left join t2 on t2.a=t1.b)
    left join t3 on t3.a=t1.b
  ) left join (select grp_id, count(*)
               from
                 t22 join t10 left join t11 on t11.col1=t10.col1
               where
                 t22.pk=1
               group by grp_id) T on T.grp_id=t1.b
where
  t21.pk=1;

# And also add a non-const table

create table t5 (
  pk int primary key
  );
insert into t5 select seq from seq_1_to_1000;

explain
select * from
  t21,
  (
    (((t1 join t5 on t5.pk=t1.b)) left join t2 on t2.a=t1.b)
    left join t3 on t3.a=t1.b
  ) left join (select grp_id, count(*)
               from
                 t22 join t10 left join t11 on t11.col1=t10.col1
               where
                 t22.pk=1
               group by grp_id) T on T.grp_id=t1.b
where
  t21.pk=1;

drop table t1,t2,t3,t5, t10, t11, t21, t22;

# 5 values
create table t1(a int, b int);
insert into t1 select seq,seq from seq_1_to_5;

# 5 value groups of size 2 each
create table t2(a int, b int, key(a));
insert into t2
select A.seq,B.seq from seq_1_to_25 A, seq_1_to_2 B;

# 5 value groups of size 3 each
create table t3(a int, b int, key(a));
insert into t3
select A.seq,B.seq from seq_1_to_5 A, seq_1_to_3 B;

analyze table t1,t2,t3 persistent for all;

create table t10 (
  grp_id int,
  col1 int,
  key(grp_id)
);

# 100 groups of 100 values each
insert into t10
select
  A.seq,
  B.seq
from
  seq_1_to_100 A,
  seq_1_to_100 B;

# and X10 multiplier

create table t11 (
  col1 int,
  col2 int
);
insert into t11
select A.seq, A.seq from seq_1_to_10 A;

analyze table t10,t11 persistent for all;

let $q=  
select *
from
  (
    (t1 left join t2 on t2.a=t1.b)
     left join
    t3
    on t3.a=t1.b
  ) 
  left join
  ( 
    select grp_id, count(*)
    from t10 left join t11 on t11.col1=t10.col1
    group by grp_id
  )dt
  on dt.grp_id=t1.b;

eval explain $q;
eval $q;

set join_cache_level=4;
eval explain $q;
eval $q;

set join_cache_level=default;

drop index a on t2;
drop index a on t3;

eval explain $q;
eval $q;

drop table t1,t2,t3;
drop table t10, t11;


--echo #
--echo # MDEV-31194: Server crash or assertion failure with join_cache_level=4
--echo # (a followup to the above bug, MDEV-26301)
--echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (3),(4);

CREATE TABLE t2 (id INT PRIMARY KEY) ENGINE=Aria;
INSERT INTO t2 VALUES (1),(2);

set @tmp1= @@optimizer_switch, @tmp2= @@join_cache_level;
set
  optimizer_switch= 'derived_with_keys=off',
  join_cache_level= 4;

SELECT t1.* FROM t1 JOIN (SELECT id, COUNT(*) FROM t2 GROUP BY id) sq ON sq.id= t1.a;

set optimizer_switch= @tmp1, join_cache_level= @tmp2;

# Cleanup
DROP TABLE t1, t2;

--echo # End of 10.4 tests

SET GLOBAL innodb_stats_persistent=@save_innodb_stats_persistent;