path: root/mysql-test/t/subselect_mat.test

#
# Hash semi-join regression tests
# (WL#1110: Subquery optimization: materialization)
#

--disable_warnings
drop table if exists t1, t2, t3, t1i, t2i, t3i;
drop view if exists v1, v2, v1m, v2m;
--enable_warnings

create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
create table t3 (c1 char(8), c2 char(8));

insert into t1 values ('1 - 00', '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t1 values ('1 - 02', '2 - 02');

insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 03', '2 - 03');

insert into t3 values ('1 - 01', '2 - 01');
insert into t3 values ('1 - 02', '2 - 02');
insert into t3 values ('1 - 03', '2 - 03');
insert into t3 values ('1 - 04', '2 - 04');

# Indexed columns
create table t1i (a1 char(8), a2 char(8));
create table t2i (b1 char(8), b2 char(8));
create table t3i (c1 char(8), c2 char(8));
create index it1i1 on t1i (a1);
create index it1i2 on t1i (a2);
create index it1i3 on t1i (a1, a2);

create index it2i1 on t2i (b1);
create index it2i2 on t2i (b2);
create index it2i3 on t2i (b1, b2);

create index it3i1 on t3i (c1);
create index it3i2 on t3i (c2);
create index it3i3 on t3i (c1, c2);

insert into t1i select * from t1;
insert into t2i select * from t2;
insert into t3i select * from t3;

# force the use of materialization
set @@optimizer_switch='semijoin=off';

/******************************************************************************
* Simple tests.
******************************************************************************/
# non-indexed nullable fields
explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
select * from t1 where a1 in (select b1 from t2 where b1 > '0');

explain extended
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);

explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);

explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);

# indexed columns
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
select * from t1i where a1 in (select b1 from t2i where b1 > '0');

explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);

explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');

explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);

explain extended
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);

# BUG#31639: Wrong plan for uncorrelated subquery when loose scan is applicable.
explain extended
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);
select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1);

prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st1;
execute st1;
prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)";
execute st2;
execute st2;

explain extended
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
-- error 1235
select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1);

# test re-optimization/re-execution with different execution methods
# prepare once, exec with different modes
set @@optimizer_switch='default,semijoin=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='default,materialization=off';
execute st1;
set @@optimizer_switch='default,semijoin=off';
execute st1;

set @@optimizer_switch='default,materialization=off';
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch='default,semijoin=off';
execute st1;
set @@optimizer_switch='default,materialization=off';
execute st1;
set @@optimizer_switch='default,semijoin=off';

# materialize the result of ORDER BY
# non-indexed fields
explain extended
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2);
# indexed fields
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2);

/******************************************************************************
* Views, UNIONs, several levels of nesting.
******************************************************************************/
# materialize the result of subquery over temp-table view

create algorithm=merge view v1 as
select b1, c2 from t2, t3 where b2 > c2;

create algorithm=merge view v2 as
select b1, c2 from t2, t3 group by b2, c2;

create algorithm=temptable view v1m as
select b1, c2 from t2, t3 where b2 > c2;

create algorithm=temptable view v2m as
select b1, c2 from t2, t3 group by b2, c2;

select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null);
select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null);

select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null);
select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null);

drop view v1, v2, v1m, v2m;

# nested subqueries, views
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 >  '0') and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2 where b1 >  '0') and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));

explain extended
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
      (a1, a2) in (select c1, c2 from t3i
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
      (a1, a2) in (select c1, c2 from t3i
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));

explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 where c2 LIKE '%02') or
                         b2 in (select c2 from t3 where c2 LIKE '%03')) and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 where c2 LIKE '%02') or
                         b2 in (select c2 from t3 where c2 LIKE '%03')) and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));

# as above with correlated innermost subquery
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 t3a where c1 = a1) or
                         b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
      (a1, a2) in (select c1, c2 from t3 t3c
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 t3a where c1 = a1) or
                         b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
      (a1, a2) in (select c1, c2 from t3 t3c
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));


# multiple levels of nesting subqueries, unions
explain extended
(select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 where c2 LIKE '%02') or
                         b2 in (select c2 from t3 where c2 LIKE '%03')
                   group by b1, b2) and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
      (a1, a2) in (select c1, c2 from t3i
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));

(select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 where c2 LIKE '%02') or
                         b2 in (select c2 from t3 where c2 LIKE '%03')
                   group by b1, b2) and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0')))
UNION
(select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
      (a1, a2) in (select c1, c2 from t3i
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));


# UNION of subqueries as a subquery (thus it is not computed via materialization)
explain extended
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
select * from t1
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
      (a1, a2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
# as above, with a join conditon between the outer references
explain extended
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
      (c1, c2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
       a1 = c1;
select * from t1, t3
where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and
      (c1, c2) in (select c1, c2 from t3
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
       a1 = c1;


/******************************************************************************
* Negative tests, where materialization should not be applied.
******************************************************************************/
# UNION in a subquery
explain extended
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
select * from t3
where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');

# correlation
explain extended
select * from t1
where (a1, a2) in (select b1, b2 from t2
                   where b2 in (select c2 from t3 t3a where c1 = a1) or
                         b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
      (a1, a2) in (select c1, c2 from t3 t3c
                   where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2));

# subquery has no tables
explain extended
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01');
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01');
explain extended
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);
select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual);


/******************************************************************************
* Subqueries in other uncovered clauses.
******************************************************************************/

/* SELECT clause */
select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1;

/* GROUP BY clause */
create table columns (col int key);
insert into columns values (1), (2);

explain extended
select * from t1 group by (select col from columns limit 1);
select * from t1 group by (select col from columns limit 1);

explain extended
select * from t1 group by (a1 in (select col from columns));
select * from t1 group by (a1 in (select col from columns));

/* ORDER BY clause */
explain extended
select * from t1 order by (select col from columns limit 1);
select * from t1 order by (select col from columns limit 1);

/******************************************************************************
* Column types/sizes that affect materialization.
******************************************************************************/

/*
  Test that BLOBs are not materialized (except when arguments of some functions).
*/
# force materialization to be always considered
set @@optimizer_switch='semijoin=off';
set @prefix_len = 6;

# BLOB == 16 (small blobs that could be stored in HEAP tables)
set @blob_len = 16;
set @suffix_len = @blob_len - @prefix_len;

create table t1_16 (a1 blob(16), a2 blob(16));
create table t2_16 (b1 blob(16), b2 blob(16));
create table t3_16 (c1 blob(16), c2 blob(16));

insert into t1_16 values
 (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_16 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_16 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));

insert into t2_16 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_16 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_16 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));

insert into t3_16 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_16 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_16 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_16 values
 (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));

# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_16
where a1 in (select b1 from t2_16 where b1 > '0');

# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_16
where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0');

# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_16
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');

# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);

select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);

set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512)

explain extended select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);

select left(a1,7), left(a2,7)
from t1_16
where a1 in (select group_concat(b1) from t2_16 group by b2);

# BLOB column at the second (intermediate) level of nesting
explain extended
select * from t1
where concat(a1,'x') IN
      (select left(a1,8) from t1_16
       where (a1, a2) IN
             (select t2_16.b1, t2_16.b2 from t2_16, t2
              where t2.b2 = substring(t2_16.b2,1,6) and
                    t2.b1 IN (select c1 from t3 where c2 > '0')));


drop table t1_16, t2_16, t3_16;


# BLOB == 512 (CONVERT_IF_BIGGER_TO_BLOB == 512)
set @blob_len = 512;
set @suffix_len = @blob_len - @prefix_len;

create table t1_512 (a1 blob(512), a2 blob(512));
create table t2_512 (b1 blob(512), b2 blob(512));
create table t3_512 (c1 blob(512), c2 blob(512));

insert into t1_512 values
 (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_512 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_512 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));

insert into t2_512 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_512 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_512 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));

insert into t3_512 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_512 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_512 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_512 values
 (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));

# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_512
where a1 in (select b1 from t2_512 where b1 > '0');

# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_512
where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0');

# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_512
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');

# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);

select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);

set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512)

explain extended select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);

select left(a1,7), left(a2,7)
from t1_512
where a1 in (select group_concat(b1) from t2_512 group by b2);

drop table t1_512, t2_512, t3_512;


# BLOB == 1024 (group_concat_max_len == 1024)
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;

create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
create table t3_1024 (c1 blob(1024), c2 blob(1024));

insert into t1_1024 values
 (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));

insert into t2_1024 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));

insert into t3_1024 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1024 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1024 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1024 values
 (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));

# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select b1 from t2_1024 where b1 > '0');

# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_1024
where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0');

# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');

# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);

select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);

set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1024)

explain extended select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);

select left(a1,7), left(a2,7)
from t1_1024
where a1 in (select group_concat(b1) from t2_1024 group by b2);

drop table t1_1024, t2_1024, t3_1024;


# BLOB == 1025
set @blob_len = 1025;
set @suffix_len = @blob_len - @prefix_len;

create table t1_1025 (a1 blob(1025), a2 blob(1025));
create table t2_1025 (b1 blob(1025), b2 blob(1025));
create table t3_1025 (c1 blob(1025), c2 blob(1025));

insert into t1_1025 values
 (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1025 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1025 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));

insert into t2_1025 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1025 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1025 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));

insert into t3_1025 values
 (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t3_1025 values
 (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t3_1025 values
 (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
insert into t3_1025 values
 (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len)));

# single value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select b1 from t2_1025 where b1 > '0');

# row value transformer
explain extended select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_1025
where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0');

# string function with a blob argument, the return type may be != blob
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');

select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');

# group_concat with a blob argument - depends on
# the variable group_concat_max_len, and
# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB
explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);

select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);

set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1025)

explain extended select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);

select left(a1,7), left(a2,7)
from t1_1025
where a1 in (select group_concat(b1) from t2_1025 group by b2);

drop table t1_1025, t2_1025, t3_1025;

# test for BIT fields
create table t1bit (a1 bit(3), a2 bit(3));
create table t2bit (b1 bit(3), b2 bit(3));

insert into t1bit values (b'000', b'100');
insert into t1bit values (b'001', b'101');
insert into t1bit values (b'010', b'110');

insert into t2bit values (b'001', b'101');
insert into t2bit values (b'010', b'110');
insert into t2bit values (b'110', b'111');

set @@optimizer_switch='semijoin=off';

explain extended select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);

select bin(a1), bin(a2)
from t1bit
where (a1, a2) in (select b1, b2 from t2bit);

drop table t1bit, t2bit;

# test mixture of BIT and BLOB
create table t1bb (a1 bit(3), a2 blob(3));
create table t2bb (b1 bit(3), b2 blob(3));

insert into t1bb values (b'000', '100');
insert into t1bb values (b'001', '101');
insert into t1bb values (b'010', '110');

insert into t2bb values (b'001', '101');
insert into t2bb values (b'010', '110');
insert into t2bb values (b'110', '111');

explain extended select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);

select bin(a1), a2
from t1bb
where (a1, a2) in (select b1, b2 from t2bb);

drop table t1bb, t2bb;
drop table t1, t2, t3, t1i, t2i, t3i, columns;

/******************************************************************************
* Test the cache of the left operand of IN.
******************************************************************************/
set @@optimizer_switch='semijoin=off';

# Test that default values of Cached_item are not used for comparison
create table t1 (s1 int);
create table t2 (s2 int);
insert into t1 values (5),(1),(0);
insert into t2 values (0), (1);
select s2 from t2 where s2 in (select s1 from t1);
drop table t1, t2;

create table t1 (a int not null, b int not null);
create table t2 (c int not null, d int not null);
create table t3 (e int not null);

# the first outer row has no matching inner row
insert into t1 values (1,10);
insert into t1 values (1,20);
insert into t1 values (2,10);
insert into t1 values (2,20);
insert into t1 values (2,30);
insert into t1 values (3,20);
insert into t1 values (4,40);

insert into t2 values (2,10);
insert into t2 values (2,20);
insert into t2 values (2,40);
insert into t2 values (3,20);
insert into t2 values (4,10);
insert into t2 values (5,10);

insert into t3 values (10);
insert into t3 values (10);
insert into t3 values (20);
insert into t3 values (30);

explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);

create index it1a on t1(a);

explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);

# the first outer row has a matching inner row
insert into t2 values (1,10);

explain extended
select a from t1 where a in (select c from t2 where d >= 20);
select a from t1 where a in (select c from t2 where d >= 20);

# cacheing for IN predicates inside a having clause - here the cached
# items are changed to point to temporary tables.
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
select a from t1 group by a having a in (select c from t2 where d >= 20);

# create an index that can be used for the outer query GROUP BY 
create index iab on t1(a, b);
explain extended
select a from t1 group by a having a in (select c from t2 where d >= 20);
select a from t1 group by a having a in (select c from t2 where d >= 20);

explain extended
select a from t1 group by a
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
select a from t1 group by a
having a in (select c from t2 where d >= some(select e from t3 where max(b)=e));
explain extended
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));
select a from t1
where a in (select c from t2 where d >= some(select e from t3 where b=e));

drop table t1, t2, t3;

#
# BUG#36133 "Assertion `exec_method != MATERIALIZATION || (exec_method == MATERIALIZATION &&"
#
create table t2 (a int, b int, key(a), key(b));
insert into t2 values (3,3),(3,3),(3,3);
select 1 from t2 where  
    t2.a > 1 
  or 
    t2.a = 3 and not t2.a not in (select t2.b from t2);
drop table t2;

#
# BUG#37896 Assertion on entry of Item_in_subselect::exec on subquery with AND NOT
#
create table t1 (a1 int key);
create table t2 (b1 int);
insert into t1 values (5);

# Query with group by, executed via materialization
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
# Query with group by, executed via IN=>EXISTS
set @@optimizer_switch='default,materialization=off';
explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1);
select min(a1) from t1 where 7 in (select b1 from t2 group by b1);

# Executed with materialization
set @@optimizer_switch='default,semijoin=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
# Executed with semi-join. Notice, this time we get a different result (NULL).
# This is the only correct result of all four queries. This difference is
# filed as BUG#40037.
set @@optimizer_switch='default,materialization=off';
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
drop table t1,t2;

#
# BUG#36752 "subquery materialization produces wrong results when comparing different types"
#
create table t1 (a char(2), b varchar(10));
insert into t1 values ('a',  'aaa');
insert into t1 values ('aa', 'aaaa');

set @@optimizer_switch='default,semijoin=off';
explain select a,b from t1 where b in (select a from t1);
select a,b from t1 where b in (select a from t1);
prepare st1 from "select a,b from t1 where b in (select a from t1)";
execute st1;
execute st1;
drop table t1;

#
# Bug #44303 Assertion failures in Field_new_decimal::store_decimal
#            when executing materialized InsideOut semijoin
# 
CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM;
INSERT INTO t1 (f1, f2) VALUES (1, 1.789);
INSERT INTO t1 (f1, f2) VALUES (13, 1.454);
INSERT INTO t1 (f1, f2) VALUES (10, 1.668);

CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1, 1.789);
INSERT INTO t2 VALUES (13, 1.454);

SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);

DROP TABLE t1, t2;

#
# BUG#46548 IN-subqueries return 0 rows with materialization=on
#
CREATE TABLE t1 (
  pk int,
  a varchar(1),
  b varchar(4),
  c varchar(4),
  d varchar(4),
  PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');

CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');

SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
DROP TABLE t1, t2;