#
# ORDER BY handling (e.g. filesort) tests that require innodb
#
-- source include/have_innodb.inc
-- source include/have_sequence.inc

--echo #
--echo # MDEV-6434: Wrong result (extra rows) with ORDER BY, multiple-column index, InnoDB
--echo #

CREATE TABLE t1 (a INT, b INT, c INT, d TEXT, KEY idx(a,b,c)) ENGINE=InnoDB
STATS_PERSISTENT=0;

INSERT INTO t1 (a,c) VALUES
(8, 9),(8, 10),(13, 15),(16, 17),(16, 18),(16, 19),(20, 21),
(20, 22),(20, 24),(20, 25),(20, 26),(20, 27),(20, 28);

SELECT  * FROM t1 WHERE a = 8 AND (b = 1 OR b IS NULL) ORDER BY c;

DROP TABLE t1;

--echo #
--echo # MDEV-9457: Poor query plan chosen for ORDER BY query by a recent 10.1
--echo #
create table t1 (
  pk int primary key,
  key1 int,
  key2 int,
  col1 char(255),
  key(key1),
  key(key2)
) engine=innodb stats_persistent=0;

insert into t1 
select seq,seq,seq,repeat('abcd', 63) from seq_0_to_9999;

--echo # The following must NOT use 'index' on PK. 
--echo # It should use index_merge(key1,key2) + filesort
--replace_column 9 #
explain 
select * 
from t1
where key1<3 or key2<3
order by pk;

--replace_column 9 #
explain 
select * 
from t1
where key1<3 or key2<3;

drop table t1;

--echo #
--echo # MDEV-18094: Query with order by limit picking index scan over filesort
--echo #

create table t0 (a int);
INSERT INTO t0 VALUES (0),(0),(0),(0),(2),(0),(0),(1),(1),(0);

CREATE TABLE t1 (
a int(11),
b int(11),
c int(11),
KEY a_c (a,c),
KEY a_b (a,b)
) ENGINE=InnoDB;
insert into t1 select A.a , B.a, C.a from t0 A, t0 B, t0 C;

--echo # should use ref access
explain select a,b,c from t1 where a=1 and c=2 order by b;

--echo # both should use range access
explain select a,b,c from t1 where a=1 and c=2 order by b limit 1000;
explain select a,b,c from t1 where a=1 and c=2 order by b limit 2000;
drop table t1,t0;

--echo # Start of 10.2 tests

--echo #
--echo # MDEV-14071: wrong results with orderby_uses_equalities=on
--echo # (duplicate of MDEV-13994)
--echo #

CREATE TABLE t1 (i int, j int, z int,PRIMARY KEY (i,j), KEY (z)) ENGINE=InnoDB
STATS_PERSISTENT=0;
CREATE TABLE t2 (i int, j int, PRIMARY KEY (i,j)) ENGINE=InnoDB
STATS_PERSISTENT=0;
CREATE TABLE t3 (j int, n varchar(5), PRIMARY KEY (j)) ENGINE=InnoDB
STATS_PERSISTENT=0;

INSERT INTO t1 VALUES
  (127,0,1),(188,0,1),(206,0,1),(218,0,1),(292,0,1),(338,0,1),(375,0,1),
  (381,0,1),(409,0,1),(466,0,1),(469,0,1),(498,0,1),(656,0,1);
INSERT INTO t1 VALUES
  (77,4,0),(86,7,0),(96,6,0),(96,7,0),(99,9,0),(99,10,0),(99,11,0),(104,4,0),
  (106,5,0),(148,6,0),(177,6,0),(181,5,0),(188,8,0),(218,8,0),(253,7,0),
  (268,4,0),(338,4,0),(409,7,0),(466,8,0),(469,8,0),(498,8,0),(656,8,0);

INSERT INTO t2 VALUES
  (127,7),(188,8),(188,9),(206,6),(218,8),(218,9),(292,7),(338,4),(338,5),
  (375,6),(381,5),(409,7),(409,8),(466,8),(466,9),(469,8),(469,9),(498,8),
  (498,9),(656,8),(656,9);
INSERT INTO t3 VALUES
  (4,'four'),(5,'five'),(6,'six'),(7,'seven'),(8,'eight'),(9,'nine');

let $q1=
SELECT i,n
FROM t1 INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
WHERE i IN (SELECT i FROM t1 WHERE z=1) AND z=0 ORDER BY i;
let $q2=
SELECT i,n
FROM t1 x INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
WHERE EXISTS (SELECT * FROM t1 WHERE i=x.i AND z=1) AND z=0 ORDER BY i;

SET @save_optimizer_switch=@@optimizer_switch;

SET optimizer_switch='orderby_uses_equalities=off';
eval $q1;
eval $q2;

SET optimizer_switch='orderby_uses_equalities=on';
eval $q1;
eval $q2;

set optimizer_switch= @save_optimizer_switch;

DROP TABLE t1,t2,t3;

--echo #
--echo # MDEV-25858: Query results are incorrect when indexes are added
--echo #

CREATE TABLE t1 (id int NOT NULL PRIMARY KEY) engine=innodb
STATS_PERSISTENT=0;
insert into t1 values (1),(2),(3);

CREATE TABLE t2 (
  id int NOT NULL PRIMARY KEY,
  id2 int NOT NULL,
  d1 datetime,
  d2 timestamp NOT NULL,
  KEY id2 (id2)
) engine=innodb stats_persistent=0;

insert into t2 values
  (1,2,'2019-03-05 00:00:00','2019-03-06 00:00:00'),
  (2,3,'2019-03-05 00:00:00','2019-03-06 00:00:00'),
  (3,3,'2019-03-06 00:00:00','2019-03-05 00:00:00');

analyze table t1,t2 persistent for all;
select
  t1.id,t2.id
from
  t1 left join
  t2 on t2.id2 = t1.id and
        t2.id = (select dd.id
                 from t2 dd
                 where
                    dd.id2 = t1.id and
                    d1 > '2019-02-06 00:00:00'
                 order by
                   dd.d1 desc, dd.d2 desc, dd.id desc limit 1
                );

create index for_latest_sort on t2 (d1, d2, id);
analyze table t2 persistent for all;

select
  t1.id,t2.id
from
  t1 left join
  t2 on t2.id2 = t1.id and
        t2.id = (select dd.id
                 from t2 dd
                 where
                    dd.id2 = t1.id and
                    d1 > '2019-02-06 00:00:00'
                 order by
                   dd.d1 desc, dd.d2 desc, dd.id desc limit 1
                );

--echo # Now, same as above but use a DESC index

CREATE TABLE t3 (
  id int NOT NULL PRIMARY KEY,
  id2 int NOT NULL,
  d1 datetime,
  d2 timestamp NOT NULL,
  KEY id2 (id2)
) engine=innodb;

insert into t3 values
  (1,2,'2019-03-05 00:00:00','2019-03-06 00:00:00'),
  (2,3,'2019-03-05 00:00:00','2019-03-06 00:00:00'),
  (3,3,'2019-03-06 00:00:00','2019-03-05 00:00:00');
create index for_latest_sort on t3 (d1 desc, d2 desc, id desc);


select
  t1.id,t3.id
from
  t1 left join
  t3 on t3.id2 = t1.id and
        t3.id = (select dd.id
                 from t3 dd
                 where
                    dd.id2 = t1.id and
                    d1 > '2019-02-06 00:00:00'
                 order by
                   dd.d1 desc, dd.d2 desc, dd.id desc limit 1
                );


--echo #
--echo # MDEV-27270: Wrong query plan with Range Checked for Each Record and ORDER BY ... LIMIT
--echo #

--echo # This must NOT have "Range checked for each record" without any
--echo #   provisions to produce rows in the required ordering:
--replace_column 9 #
explain
select
  t1.id,t2.id
from
  t1 left join
  t2 on t2.id2 = t1.id and
        t2.id = (select dd.id
                 from t2 dd
                 where
                    dd.id2 = t1.id and
                    d1 > '2019-02-06 00:00:00'
                 order by
                   dd.d1, dd.d2, dd.id limit 1
                );

drop table t1,t2,t3;

--echo # End of 10.2 tests

--echo #
--echo # MDEV-26938 Support descending indexes internally in InnoDB
--echo #
create table t1 (a int, b int, c int, key r (a desc, b asc));
insert t1 select seq % 10, seq div 10, seq from seq_1_to_55;
insert t1 values (NULL, NULL, NULL), (9, NULL, NULL);
explain select * from t1 force index(r) order by a,b limit 20;
explain select * from t1 force index(r) order by a desc,b limit 20;
        select * from t1 force index(r) order by a desc,b limit 20;
drop table t1;