# true, false, null, false, null
select a, oref, a in (select max(ie)
from t1 where oref=t2.oref group by grp) Z from t2;
# This must have a trigcond
explain extended
select a, oref, a in (select max(ie)
from t1 where oref=t2.oref group by grp) Z from t2;
# This must not have a trigcond:
explain extended
select a, oref from t2
where a in (select max(ie) from t1 where oref=t2.oref group by grp);
select a, oref, a in (
select max(ie) from t1 where oref=t2.oref group by grp union
select max(ie) from t1 where oref=t2.oref group by grp
) Z from t2;
# Non-correlated subquery, 2 NULL evaluations
create table t3 (a int);
insert into t3 values (NULL), (NULL);
flush status;
--disable_cursor_protocol
--disable_ps2_protocol
select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
--enable_ps2_protocol
--enable_cursor_protocol
show status like 'Handler_read_rnd_next';
select ' ^ This must show 11' Z;
set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
# This must show trigcond:
explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3;
create table t2 (a int, oref int);
insert into t2 values (1, 1), (2,2), (NULL, 3), (NULL, 4);
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
# The next explain shows "using index" but that is just incorrect display
# (there is a bug filed about this).
explain extended
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
--disable_ps2_protocol
flush status;
--disable_cursor_protocol
select oref, a from t2 where a in (select a from t1 where oref=t2.oref);
--enable_cursor_protocol
# This will only show access to t2:
show status like '%Handler_read_rnd_next';
# Check that repeated NULL-scans are not cached (subq. isnot correlated):
delete from t2;
insert into t2 values (NULL, 0),(NULL, 0), (NULL, 0), (NULL, 0);
set optimizer_switch='subquery_cache=off';
flush status;
--disable_cursor_protocol
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
--enable_cursor_protocol
show status like '%Handler_read%';
select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z; set @@optimizer_switch=@save_optimizer_switch;
--enable_ps2_protocol
drop table t1, t2;
#
# 3. Subquery handled with'unique_index_subquery':
#
create table t1 (a int, b int, primary key (a));
insert into t1 values (1,1), (3,1),(100,1);
create table t2 (a int, b int);
insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
drop table t1, t2;
#
# 4. Subquery that is a join, with ref access
#
create table t1 (a int, b int, key(a));
insert into t1 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
create table t2 like t1;
insert into t2 select * from t1;
update t2 set b=1;
create table t3 (a int, oref int);
insert into t3 values (1, 1), (NULL,1), (NULL,0);
select a, oref,
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
from t3;
# This must have trigcond in WHERE and HAVING:
explain extended
select a, oref,
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
from t3;
drop table t1, t2, t3;
#
# BUG#24085: Wrong query result for"NULL IN (SELECT ... UNION SELECT ...)"
#
# case1: NULL IN (SELECT not_null_val FROM ...) w/o HAVING/GROUP-BY/etc
create table t1 (a int NOT NULL, b int NOT NULL, key(a));
insert into t1 values
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
create table t2 like t1;
insert into t2 select * from t1;
update t2 set b=1;
create table t3 (a int, oref int);
insert into t3 values (1, 1), (NULL,1), (NULL,0);
select a, oref,
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
from t3;
--echo This must show a trig_cond:
explain extended
select a, oref,
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
from t3;
drop table t1,t2,t3;
# case2: NULL IN (SELECT not_null_val FROM) where SELECT has GROUP BY
create table t1 (oref int, grp int);
insert into t1 (oref, grp) values
(1, 1),
(1, 1);
# Ok, for
# select count(*) from t1 group by grp having grp=PARAM
# we'll have:
# PARAM subuqery result
# 1 -> {(2)}
# 2 -> {} - empty set
create table t2 (oref int, a int);
insert into t2 values
(1, NULL),
(2, NULL);
select a, oref,
a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
--echo This must show a trig_cond:
explain extended
select a, oref,
a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
drop table t1, t2;
create table t1 (a int, b int, primary key (a));
insert into t1 values (1,1), (3,1),(100,1);
create table t2 (a int, b int);
insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
select a,b, a in (select a from t1 where t1.b = t2.b union select a from
t1 where t1.b = t2.b) Z from t2 ;
select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
drop table t1, t2;
#
# BUG#24127: Incorrect results of row-based subqueries with NULLs on the left side.
#
create table t3 (a int);
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, b int, oref int);
insert into t2 values (NULL,1, 100), (NULL,2, 100);
create table t1 (a int, b int, c int, key(a,b));
insert into t1 select 2*A, 2*A, 100 from t3;
# First test index subquery engine
explain extended select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
# Then check that we do turn off 'ref' scans in the subquery
create table t4 (x int);
insert into t4 select A.a + 10*B.a from t1 A, t1 B;
explain extended
select a,b, oref,
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
from t2;
select a,b, oref,
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
from t2;
drop table t1,t2,t3,t4;
--echo # More tests for tricky multi-column cases, where some of pushed-down
--echo # equalities are used for index lookups and some are not.
('ff', 20, 2, 2),
('ff', 20, 1, 2);
create table t2 (oref char(4), a int, b int) charset=latin1;
insert into t2 values
('ee', NULL, 1),
('bb', 2, 1),
('ff', 2, 2),
('cc', 3, NULL),
('bb', NULL, NULL),
('aa', 1, 1),
('dd', 1, NULL);
alter table t1 add index idx(ie1,ie2);
# cc 3 NULL NULL
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=3and b is null ;
insert into t2 values ('new1', 10,10);
insert into t1 values ('new1', 1234, 10, NULL);
# new1, 10, 10, NULL,
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10and b=10;
explain extended
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10and b=10;
drop table t1, t2;
# Now test different column types:
create table t1 (oref char(4), grp int, ie int) charset=latin1;
insert into t1 (oref, grp, ie) values
('aa', 10, 2),
('aa', 10, 1),
('aa', 20, NULL),
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
explain select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
explain select oref, a from t2 where a notin (select ie from t1 where oref=t2.oref);
select oref, a from t2 where a notin (select ie from t1 where oref=t2.oref);
explain
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
drop table t1,t2;
#
# BUG#24420: row-based IN suqueries with aggregation when the left operand
# of the subquery predicate may contain NULL values
#
create table t1 (a int, b int);
insert into t1 values (0,0), (2,2), (3,3);
create table t2 (a int, b int);
insert into t2 values (1,1), (3,3);
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
insert into t2 values (NULL,4);
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
drop table t1,t2;
#
# Bug #24484: Aggregate function used in column list subquery gives erroneous
# error
#
CREATE TABLE t1 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
INSERT INTO t1 VALUES (1,1,'a'), (1,2,'b'), (1,3,'c'), (1,4,'d'), (1,5,'e'),
(2,1,'f'), (2,2,'g'), (2,3,'h'), (3,4,'i'),(3,3,'j'), (3,2,'k'), (3,1,'l'),
(1,9,'m');
CREATE TABLE t2 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
INSERT INTO t2 SELECT * FROM t1;
# Gives error, but should work since it is (a, b) is the PK so only one
# given match possible
SELECT a, MAX(b), (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)) as test FROM t1 GROUP BY a;
SELECT * FROM t1 GROUP by t1.a
HAVING (MAX(t1.b) > (SELECT MAX(t2.b) FROM t2 WHERE t2.c < t1.c
HAVING MAX(t2.b+t1.a) < 10));
SELECT a,b,c FROM t1 WHERE b in (9,3,4) ORDER BY b,c;
SELECT a, MAX(b),
(SELECT COUNT(DISTINCT t.c) FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)
LIMIT 1) as cnt,
(SELECT t.b FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) as t_b,
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) as t_b,
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) ORDER BY t.c LIMIT 1) as t_b
FROM t1 GROUP BY a;
SELECT a, MAX(b),
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) as test
FROM t1 GROUP BY a;
DROP TABLE t1, t2;
# The next three test cases must be executed with the IN=>EXISTS strategy set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
#
# Bug #27870: crash of an equijoin query with WHERE condition containing
# a subquery predicate of the form <join attr> NOTIN (SELECT ...)
#
CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int, PRIMARY KEY(b));
INSERT INTO t1 VALUES (1), (NULL), (4);
INSERT INTO t2 VALUES (3), (1),(2), (5), (4), (7), (6);
EXPLAIN EXTENDED
SELECT a FROM t1, t2 WHERE a=b AND (b NOTIN (SELECT a FROM t1));
SELECT a FROM t1, t2 WHERE a=b AND (b NOTIN (SELECT a FROM t1));
SELECT a FROM t1, t2 WHERE a=b AND (b NOTIN (SELECT a FROM t1 WHERE a > 4));
DROP TABLE t1,t2;
#
# Bug #28375: crash forNOTIN subquery predicate when left operand becomes NULL
#
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int PRIMARY KEY);
CREATE TABLE t3 (id int PRIMARY KEY, name varchar(10));
INSERT INTO t1 VALUES (2), (NULL), (3), (1);
INSERT INTO t2 VALUES (234), (345), (457);
INSERT INTO t3 VALUES (222,'bbb'), (333,'ccc'), (111,'aaa');
EXPLAIN
SELECT * FROM t1
WHERE t1.id NOTIN (SELECT t2.id FROM t2,t3
WHERE t3.name='xxx'AND t2.id=t3.id);
SELECT * FROM t1
WHERE t1.id NOTIN (SELECT t2.id FROM t2,t3
WHERE t3.name='xxx'AND t2.id=t3.id);
SELECT (t1.id IN (SELECT t2.id FROM t2,t3
WHERE t3.name='xxx'AND t2.id=t3.id)) AS x
FROM t1;
DROP TABLE t1,t2,t3;
#
# Bug #22855: Optimizer doesn't rewrite NOT IN subselects to a correlated
# subquery
#
CREATE TABLE t1 (a INT NOT NULL);
INSERT INTO t1 VALUES (1),(-1), (65),(66);
CREATE TABLE t2 (a INT UNSIGNED NOT NULL PRIMARY KEY);
INSERT INTO t2 VALUES (65),(66);
SELECT a FROM t1 WHERE a NOTIN (65,66);
SELECT a FROM t1 WHERE a NOTIN (SELECT a FROM t2);
EXPLAIN SELECT a FROM t1 WHERE a NOTIN (SELECT a FROM t2);
CREATE TABLE t2 (placeholder CHAR(11));
INSERT INTO t2 VALUES("placeholder");
SELECT ROW(1, 2) IN (SELECT t1.a, 2) FROM t1 GROUP BY t1.a;
SELECT ROW(1, 2) IN (SELECT t1.a, 2 FROM t2) FROM t1 GROUP BY t1.a;
DROP TABLE t1, t2;
#
# Bug #36005: crash in subselect with single row
# (subselect_single_select_engine::exec)
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);
CREATE TABLE t2 SELECT * FROM t1;
SELECT 1 FROM t1 WHERE t1.a NOTIN (SELECT 1 FROM t1, t2 WHERE 0);
DROP TABLE t1, t2;
#
# Bug 2198
#
create table t1 (a int, b decimal(13, 3));
insert into t1 values (1, 0.123);
select a, (select max(b) from t1) into outfile "../../tmp/subselect.out.file.1" from t1;
delete from t1;
load data infile "../../tmp/subselect.out.file.1" into table t1;
select * from t1;
drop table t1;
let $datadir=`select @@datadir`;
--remove_file $MYSQLTEST_VARDIR/tmp/subselect.out.file.1
#
# Bug #37894: Assertion in init_read_record_seq in handler.h line 1444
#
SELECT varchar_nokey
FROM t1
WHERE NULL NOTIN (
SELECT INNR.pk FROM t1 AS INNR2
LEFT JOIN t1 AS INNR ON ( INNR2.int_key = INNR.int_key )
WHERE INNR.varchar_key > 'n{'
);
DROP TABLE t1;
#
# Bug #39069: <row constructor> IN <table-subquery> seriously messed up
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1), (2), (11);
--echo # 2nd and3rd columns should be same
SELECT a, ROW(11, 12) = (SELECT a, 22), ROW(11, 12) IN (SELECT a, 22) FROM t1 GROUP BY t1.a;
SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1 GROUP BY t1.a;
SELECT a, ROW(11, 12) = (SELECT a, 22), ROW(11, 12) IN (SELECT a, 22) FROM t1;
SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1;
# The x alias is used below to workaround bug #40674.
# Regression tests for sum function on outer column in subselect from dual:
SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 22), ROW(11, 12) IN (SELECT MAX(x), 22) FROM t1;
--echo # 2nd and3rd columns should be same
EXPLAIN SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1;
SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1;
DROP TABLE t1;
#enable after fix MDEV-31728
--disable_cursor_protocol
#enable after fix MDEV-28585
--disable_view_protocol
--echo # both columns should be same
SELECT ROW(1,2) = (SELECT NULL, NULL), ROW(1,2) IN (SELECT NULL, NULL);
SELECT ROW(1,2) = (SELECT 1, NULL), ROW(1,2) IN (SELECT 1, NULL);
SELECT ROW(1,2) = (SELECT NULL, 2), ROW(1,2) IN (SELECT NULL, 2);
SELECT ROW(1,2) = (SELECT NULL, 1), ROW(1,2) IN (SELECT NULL, 1);
SELECT ROW(1,2) = (SELECT 1, 1), ROW(1,2) IN (SELECT 1, 1);
SELECT ROW(1,2) = (SELECT 1, 2), ROW(1,2) IN (SELECT 1, 2);
--enable_view_protocol
--enable_cursor_protocol
#
# Bug #37362 Crash in do_field_eq
#
# Note that currently this test produces wrong output, see MBug#430669.
#
CREATE TABLE t1 (a INT, b INT, c INT);
INSERT INTO t1 VALUES (1,1,1), (1,1,1);
--error 1054
EXPLAIN EXTENDED
SELECT c FROM
( SELECT
(SELECT COUNT(a) FROM
(SELECT COUNT(b) FROM t1) AS x GROUP BY c
) FROM t1 GROUP BY b
) AS y;
SHOW WARNINGS;
DROP TABLE t1;
--echo Endof5.0 tests
--echo #
--echo # BUG#36896: Server crash on SELECT FROM DUAL
--echo #
create table t1 (a int);
select 1as res from dual where (1) in (select * from t1);
drop table t1;
#
# BUG#36135"void Diagnostics_area::set_eof_status(THD*): Assertion `!is_set()' failed."
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int(11) default null,
b int(11) default null,
key (a)
);
# produce numbers 0..999
insert into t1 select A.a+10*(B.a+10*C.a),A.a+10*(B.a+10*C.a) from t0 A, t0 B, t0 C;
create table t2 (a int(11) default null);
insert into t2 values (0),(1);
create table t3 (a int(11) default null);
insert into t3 values (0),(1);
create table t4 (a int(11) default null);
insert into t4 values (0),(1);
create table t5 (a int(11) default null);
insert into t5 values (0),(1),(0),(1);
# this must not fail assertion
--error 1242
select * from t2, t3
where
t2.a < 10and
t3.a+1 = 2and
t3.a in (select t1.b from t1
where t1.a+1=t1.a+1and
t1.a < (select t4.a+10
from t4, t5 limit 2));
drop table t0, t1, t2, t3, t4, t5;
--echo #
--echo # BUG#48177 - SELECTs withNOTIN subqueries containing NULL
--echo # values return too many records
--echo #
CREATE TABLE t1 (
i1 int DEFAULT NULL,
i2 int DEFAULT NULL
) ;
INSERT INTO t1 VALUES (1, NULL);
INSERT INTO t1 VALUES (2, 3);
INSERT INTO t1 VALUES (4, NULL);
INSERT INTO t1 VALUES (4, 0);
INSERT INTO t1 VALUES (NULL, NULL);
CREATE TABLE t2 (
i1 int DEFAULT NULL,
i2 int DEFAULT NULL
) ;
INSERT INTO t2 VALUES (4, NULL);
INSERT INTO t2 VALUES (5, 0);
--echo
--echo Data in t1
SELECT i1, i2 FROM t1;
--echo
--echo Data in subquery (should be filtered out)
SELECT i1, i2 FROM t2 ORDER BY i1;
FLUSH STATUS; set @save_optimizer_switch2=@@optimizer_switch; set optimizer_switch='subquery_cache=off';
--disable_ps2_protocol
--disable_cursor_protocol
--echo
SELECT i1, i2
FROM t1
WHERE (i1, i2) NOTIN (SELECT i1, i2 FROM t2);
--enable_cursor_protocol
--echo
--echo # Check that the subquery only has to be evaluated once
--echo # for all-NULL values even though there are two (NULL,NULL) records
--echo # Baseline:
SHOW STATUS LIKE '%Handler_read_rnd_next';
--echo
INSERT INTO t1 VALUES (NULL, NULL);
FLUSH STATUS;
--disable_cursor_protocol
--echo
SELECT i1, i2
FROM t1
WHERE (i1, i2) NOTIN (SELECT i1, i2 FROM t2);
--enable_cursor_protocol
--echo
--echo # Handler_read_rnd_next should be one more than baseline
--echo # (read record from t1, but donot read from t2)
SHOW STATUS LIKE '%Handler_read_rnd_next';
--enable_ps2_protocol
set @@optimizer_switch=@save_optimizer_switch2;
DROP TABLE t1,t2;
--echo Endof5.1 tests
#
# Test for the problem with using sj-materialization when subquery's select
# list element SCOL is covered by equality propagation and has preceding equal
# column PCOL which belongs to a table within the the semi-join nest: SJM-Scan
# process should unpack column value notto SCOL but rather to PCOL, as
# substitute_best_equal has made all conditions to refer to PCOL.
#
CREATE TABLE t1 (
a int(11) NOT NULL,
b int(11) NOT NULL,
c datetime default NULL,
PRIMARY KEY (a),
KEY idx_bc (b,c)
);
create table t11 select * from t1 where b = 67AND (c IS NULL OR c > NOW()) order by 3 asc;
create table t12 select * from t1 where b = 67AND (c IS NULL OR c > NOW()) order by 3 desc;
create table t21 select * from t1 where b = 67AND (c IS NULL OR c > '2005-12-08') order by 3 asc;
create table t22 select * from t1 where b = 67AND (c IS NULL OR c > '2005-12-08') order by 3 desc;
set @@optimizer_switch=@save_optimizer_switch; set @@optimizer_switch='materialization=off';
update t22 set c = '2005-12-08 15:58:27' where a = 255;
explain select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t11, t12, t21, t22;
#
# Test sj-materialization re-execution. The test isn't meaningful (materialized
# table stays the same across all executions) because it's hard to create a
# dataset that would verify correct re-execution without hitting BUG#31480
#
create table t1(a int);
insert into t1 values (0),(1);
set @@optimizer_switch='firstmatch=off,materialization=off';
explain
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; set @@optimizer_switch=@save_optimizer_switch;
drop table t1;
#
# Test confluent duplicate weedout
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select * from t0;
insert into t1 select a+10 from t0; set @@optimizer_switch='firstmatch=off,materialization=off';
insert into t0 values(2);
explain select * from t1 where 2in (select a from t0);
select * from t1 where 2in (select a from t0); set @@optimizer_switch=@save_optimizer_switch; set @@optimizer_switch='materialization=off';
explain select * from t1 where 2in (select a from t0);
select * from t1 where 2in (select a from t0); set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch=@save_optimizer_switch; set @@optimizer_switch='materialization=off';
#
# FirstMatch referring to a derived table
# set @tmp_optimizer_switch=@@optimizer_switch; set optimizer_switch='derived_merge=off,derived_with_keys=off';
explain select * from (select a from t0) X where a in (select a from t1);
drop table t0, t1; set optimizer_switch=@tmp_optimizer_switch;
#
# LooseScan: Check if we can pick it together with range access
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
insert into t1 select * from t1 where kp1 < 20;
create table t3 (a int);
insert into t3 select A.a + 10*B.a from t0 A, t0 B;
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
create table t4 (pk int primary key);
insert into t4 select a from t3;
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c);
drop table t1, t3, t4;
set @@optimizer_switch=@save_optimizer_switch;
#
# Test if we handle duplicate elimination temptable overflowing to disk
#
create table t1 (a int) as select * from t0 where a < 5;
set @save_max_heap_table_size=@@max_heap_table_size; set @@optimizer_switch='firstmatch=off,materialization=off'; set @@max_heap_table_size= 16384;
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E where a+1 < 10000 + A.a + B.a +C.a+D.a);
flush status;
--disable_ps2_protocol
--disable_cursor_protocol
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E where a+1 < 10000 + A.a + B.a +C.a+D.a);
--enable_ps2_protocol
show status like 'Created_tmp_disk_tables';
--enable_cursor_protocol set @@max_heap_table_size=@save_max_heap_table_size; set @@optimizer_switch=@save_optimizer_switch;
drop table t0, t1;
#
# Materialize + Scan + ref access to the subsequent table based on scanned
# value
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 values (1),(2);
create table t3 ( a int , filler char(100), key(a));
insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
explain select * from t3 where a in (select a from t2) and (a > 5or a < 10);
select * from t3 where a in (select a from t2);
drop table t0, t2, t3;
#
# DATETIME type checks
# set @@optimizer_switch='firstmatch=off,materialization=off';
create table t1 (a date);
insert into t1 values ('2008-01-01'),('2008-01-01'),('2008-02-01'),('2008-02-01');
create table t2 (a int);
insert into t2 values (1),(2);
create table t3 (a char(10));
insert into t3 select * from t1;
insert into t3 values (1),(2);
explain select * from t2 where a in (select a from t1);
explain select * from t2 where a in (select a from t2);
explain select * from t2 where a in (select a from t3);
explain select * from t1 where a in (select a from t3);
drop table t1, t2, t3;
create table t1 (a decimal);
insert into t1 values (1),(2);
explain select * from t1 where a in (select a from t1);
drop table t1; set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch='materialization=off';
#
# SJ-Materialization-scan for non-first table
#
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 as select * from t1;
create table t3 (a int, b int, filler char(100), key(a));
insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C;
explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10or t3.a >30) and t1.a =3;
#
# Verify that straight_join modifier in parent or child prevents flattening
#
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
explain select straight_join * from t2 X, t2 Y
where X.a in (select straight_join A.a from t1 A, t1 B);
--echo #
--echo # SJ-Materialization scan + first table being system const table
--echo #
create table t0 (a int, b int);
insert into t0 values(1,1);
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10or t3.a >30);
create table t4 as select a as x, a as y from t1;
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10or t3.a >30);
drop table t0,t1,t2,t3,t4;
--echo #
--echo # LooseScan with ref access
--echo #
set @@optimizer_switch='join_cache_hashed=off';
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, filler char(100), key(a,b));
insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B;
create table t2 as select * from t1;
explain select * from t2 where a in (select b from t1 where a=3);
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
#
# Multi-column sj-materialization with lookups
#
create table t1 (a int, b int);
insert into t1 select a,a from t0;
create table t2 (a int, b int);
insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B;
set @@optimizer_switch='firstmatch=off,materialization=off';
explain select * from t1 where (a,b) in (select a,b from t2);
# A smallish test if find_best() still works for semi-join optimization: set @save_optimizer_search_depth=@@optimizer_search_depth; set @@optimizer_search_depth=63;
explain select * from t1 where (a,b) in (select a,b from t2); set @@optimizer_search_depth=@save_optimizer_search_depth; set @@optimizer_switch=@save_optimizer_switch;
drop table t0, t1, t2;
set @@optimizer_switch='materialization=off';
--echo #
--echo # Primitive SJ-Materialization tests for DECIMAL and DATE
--echo #
create table t0 (a decimal(4,2));
insert into t0 values (10.24), (22.11);
create table t1 as select * from t0;
insert into t1 select * from t0;
explain select * from t0 where a in (select a from t1);
select * from t0 where a in (select a from t1);
drop table t0, t1;
create table t0(a date);
insert into t0 values ('2008-01-01'),('2008-02-02');
create table t1 as select * from t0;
insert into t1 select * from t0;
explain select * from t0 where a in (select a from t1);
select * from t0 where a in (select a from t1);
drop table t0, t1;
#
# Fix a trivial crash with SJ-Materialization lookup, multiple tables in the
# subquery, and a condition on some of inner tables but not others
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 as select a as a, a as b, a as c from t0 where a < 3;
create table t2 as select a as a, a as b from t0 where a < 3;
insert into t2 select * from t2;
select count(*) from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
drop table t0,t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
--echo
--echo BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307
--echo
CREATE TABLE t1 (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`int_key` int(11) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `int_key` (`int_key`)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,9),(2,3),(3,8),(4,6),(5,9),(6,5),(7,5),(8,9),(9,1),(10,10);
SELECT `pk` FROM t1 AS OUTR WHERE `int_key` = ALL (
SELECT `int_key` FROM t1 AS INNR WHERE INNR . `pk` >= 9
);
DROP TABLE t1;
--echo
--echo BUG#40118 Crash when running Batched Key Access and requiring one match for each key
--echo
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, key(a));
insert into t1 select * from t0;
alter table t1 add b int not null, add filler char(200);
insert into t1 select * from t1;
insert into t1 select * from t1;
set @save_join_cache_level=@@join_cache_level; set join_cache_level=6;
select * from t0 where t0.a in (select t1.a from t1 where t1.b=0); set join_cache_level=@save_join_cache_level;
drop table t0, t1;
--echo #
--echo # BUG#32665 Query with dependent subquery is too slow
--echo #
create table t1 (
idIndividual int primary key
);
insert into t1 values (1),(2),(1000);
create table t2 (
idContact int primary key,
contactType int,
idObj int
);
insert into t2 values (1,1,1),(2,2,2),(3,3,3);
create table t3 (
idAddress int primary key,
idContact int,
postalStripped varchar(100)
) charset=latin1;
insert into t3 values (1,1, 'foo'), (2,2,'T2H3B2');
--echo The following must be converted to a semi-join: set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch='materialization=off';
explain extended SELECT a.idIndividual FROM t1 a
WHERE a.idIndividual IN
( SELECT c.idObj FROM t3 cona
INNER JOIN t2 c ON c.idContact=cona.idContact
WHERE cona.postalStripped='T2H3B2'
);
SELECT a.idIndividual FROM t1 a
WHERE a.idIndividual IN
( SELECT c.idObj FROM t3 cona
INNER JOIN t2 c ON c.idContact=cona.idContact
WHERE cona.postalStripped='T2H3B2'
); set @@optimizer_switch=@save_optimizer_switch;
drop table t1,t2,t3;
--echo #
--echo # BUG#47367 Crash in Name_resolution_context::process_error
--echo #
SET SESSION optimizer_switch = 'semijoin=off';
CREATE TABLE t1 (f1 INTEGER);
CREATE TABLE t2 LIKE t1;
delimiter |;
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
delimiter ;|
CALL p1;
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
DROP PROCEDURE p1;
--echo # Restore the original column list of table t2:
ALTER TABLE t2 CHANGE COLUMN my_column f1 INT;
SET SESSION optimizer_switch = 'semijoin=on';
delimiter |;
--echo # Recreate procedure so that we eliminate any caching effects
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
delimiter ;|
CALL p1;
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
DROP PROCEDURE p1;
DROP TABLE t1, t2;
--echo #
--echo # fix of lp:824425 (prohibiting subqueries in row in
--echo # left part ofIN/ALL/ANY)
--echo #
CREATE TABLE t1 ( a int) ;
INSERT INTO t1 VALUES (20),(30);
CREATE TABLE t2 (a int) ;
INSERT INTO t2 VALUES (3),(9);
CREATE TABLE t3 ( a int, b int) ;
INSERT INTO t3 VALUES (20,5),(30,6);
set @optimizer_switch_save=@@optimizer_switch; SET SESSION optimizer_switch='semijoin=OFF,in_to_exists=OFF,materialization=ON,partial_match_rowid_merge=ON,partial_match_table_scan=OFF';
SELECT * FROM t1
WHERE (
( SELECT a FROM t2 WHERE a = 9 )
) NOTIN (
SELECT b
FROM t3
);
explain extended
SELECT * FROM t1
WHERE (
( SELECT a FROM t2 WHERE a = 9 )
) NOTIN (
SELECT b
FROM t3
);
--error ER_NOT_SUPPORTED_YET
SELECT * FROM t1
WHERE (
( SELECT a FROM t2 WHERE a = 9 ),
( SELECT a FROM t2 WHERE a = 3 )
) NOTIN (
SELECT b , a
FROM t3
); set optimizer_switch=@optimizer_switch_save;
drop table t1,t2,t3;
--echo Endof5.3 tests
--echo #
--echo # BUG#48920: COUNT DISTINCT returns 1for NULL values when in a subquery
--echo # in the select list
--echo #
--echo
CREATE TABLE t1 (
i int(11) DEFAULT NULL,
v varchar(1) DEFAULT NULL
);
--echo
INSERT INTO t1 VALUES (8,'v');
INSERT INTO t1 VALUES (9,'r');
INSERT INTO t1 VALUES (NULL,'y');
--echo
CREATE TABLE t2 (
i int(11) DEFAULT NULL,
v varchar(1) DEFAULT NULL,
KEY i_key (i)
);
--echo
INSERT INTO t2 VALUES (NULL,'r');
INSERT INTO t2 VALUES (0,'c');
INSERT INTO t2 VALUES (0,'o');
INSERT INTO t2 VALUES (2,'v');
INSERT INTO t2 VALUES (7,'c');
--echo
SELECT i, v, (SELECT COUNT(DISTINCT i)
FROM t1
WHERE v = t2.v) as subsel
FROM t2;
--echo
EXPLAIN EXTENDED
SELECT i, v, (SELECT COUNT(DISTINCT i)
FROM t1
WHERE v = t2.v) as subsel
FROM t2;
DROP TABLE t1,t2;
--echo Endof5.6 tests
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(vorverarbeitet am 2026-10-08)
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