#
# Tests for range access and descending indexes
#
--source include/have_sequence.inc
--source include/have_innodb.inc

# The test uses optimizer trace:
--source include/not_embedded.inc

create table t1 (
  a int,
  key (a desc)
);
insert into t1 select seq from seq_1_to_1000;

set optimizer_trace=1;
explain select * from t1 force index(a) where a in (2, 4, 6);

#enable after fix MDEV-27871
--disable_view_protocol
select json_detailed(json_extract(trace, '$**.range_access_plan.ranges'))
from information_schema.optimizer_trace;
--enable_view_protocol
set optimizer_trace=default;

--echo # These should go in reverse order:
select * from t1 force index(a) where a in (2, 4, 6);
drop table t1;

--echo #
--echo # Multi-part key tests
--echo #
create table t1 (
  a int not null,
  b int not null,
  key ab(a, b desc)
);

insert into t1 select A.seq, B.seq*10 from seq_1_to_10 A, seq_1_to_10 B;

#enable after fix MDEV-27871
--disable_view_protocol
set optimizer_trace=1;
explain select * from t1 force index(ab) where a>=8 and b>=50;
select json_detailed(json_extract(trace, '$**.range_access_plan.ranges'))
from information_schema.optimizer_trace;

explain select * from t1 force index(ab) where a>=8 and b<=50;
select json_detailed(json_extract(trace, '$**.range_access_plan.ranges'))
from information_schema.optimizer_trace;
--enable_view_protocol

select * from t1 force index(ab) where a>=8 and b<=50;
select * from t1 ignore index(ab) where a>=8 and b<=50 order by a, b desc;

#enable after fix MDEV-27871
--disable_view_protocol
explain
select * from t1 where a between 2 and 4 and b between 50 and 80;
select json_detailed(json_extract(trace, '$**.range_access_plan.ranges'))
from information_schema.optimizer_trace;
--enable_view_protocol

select * from t1 where a between 2 and 4 and b between 50 and 80;

drop table t1;

create table t2 (
  a int not null,
  b int not null,
  key ab(a desc, b desc)
);
insert into t2 select A.seq, B.seq*10 from seq_1_to_10 A, seq_1_to_10 B;

#enable after fix MDEV-27871
--disable_view_protocol
explain
select * from t2 where a between 2 and 4;
select json_detailed(json_extract(trace, '$**.range_access_plan.ranges'))
from information_schema.optimizer_trace;

explain
select * from t2 where a between 2 and 4 and b between 50 and 80;
select json_detailed(json_extract(trace, '$**.range_access_plan.ranges'))
from information_schema.optimizer_trace;
--enable_view_protocol

drop table t2;

--echo #
--echo # Check that "Using index for group-by" is disabled (it's not supported, yet)
--echo #
CREATE TABLE t1 (p int NOT NULL, a int NOT NULL, PRIMARY KEY (p,a desc));
insert into t1 select 2,seq from seq_0_to_1000;
EXPLAIN select MIN(a) from t1 where p = 2 group by p;
#enable after fix MDEV-27871
--disable_view_protocol
select json_detailed(json_extract(trace, '$**.potential_group_range_indexes'))
from information_schema.optimizer_trace;
--enable_view_protocol
drop table t1;

set optimizer_trace=default;

--echo #
--echo # MDEV-27426: Wrong result upon query using index_merge with DESC key
--echo #

CREATE TABLE t1 (pk INT, a INT, b int, KEY(a), PRIMARY KEY(pk DESC))
ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,4,5),(2,9,6),(3,NULL,7),(4,NULL,8);

SELECT * FROM t1 WHERE pk > 10 OR a > 0;
DROP TABLE t1;


--echo #
--echo #  MDEV-27529: Wrong result upon query using index_merge with DESC key (#2)
--echo #

create table t1 (
  pk int, 
  a int, 
  b int,
  primary key(pk desc),
  key(a),
  key(b)
) engine=innodb;

insert into t1 values (0, 111111, 255);

insert into t1 select seq+50000, NULL, seq+1000 from seq_1_to_260;

insert into t1 values (10000, NULL, 255);
insert into t1 select seq+20000, seq+20000, seq+20000 from seq_1_to_1500;

analyze table t1;

--echo # Must use ROR-intersect:
explain select * from t1 where b = 255 AND a IS NULL;
select * from t1 where b = 255 AND a IS NULL;

drop table t1;