mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 10:56:12 +01:00
401 lines
10 KiB
Text
401 lines
10 KiB
Text
#
|
|
# Test of different EXPLAINs
|
|
|
|
--disable_warnings
|
|
drop table if exists t1;
|
|
--enable_warnings
|
|
create table t1 (id int not null, str char(10), unique(str));
|
|
explain select * from t1;
|
|
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
|
|
select * from t1 where str is null;
|
|
select * from t1 where str="foo";
|
|
explain select * from t1 where str is null;
|
|
explain select * from t1 where str="foo";
|
|
explain select * from t1 ignore key (str) where str="foo";
|
|
explain select * from t1 use key (str,str) where str="foo";
|
|
|
|
#The following should give errors
|
|
--error 1176
|
|
explain select * from t1 use key (str,str,foo) where str="foo";
|
|
--error 1176
|
|
explain select * from t1 ignore key (str,str,foo) where str="foo";
|
|
drop table t1;
|
|
|
|
explain select 1;
|
|
|
|
create table t1 (a int not null);
|
|
explain select count(*) from t1;
|
|
insert into t1 values(1);
|
|
explain select count(*) from t1;
|
|
insert into t1 values(1);
|
|
explain select count(*) from t1;
|
|
drop table t1;
|
|
|
|
#
|
|
# Bug #3403 Wrong encoding in EXPLAIN SELECT output
|
|
#
|
|
set names koi8r;
|
|
create table ÔÁÂ (ËÏÌ0 int, ËÏÌ1 int, key ÉÎÄ0 (ËÏÌ0), key ÉÎÄ01 (ËÏÌ0,ËÏÌ1));
|
|
insert into ÔÁÂ (ËÏÌ0) values (1);
|
|
insert into ÔÁÂ (ËÏÌ0) values (2);
|
|
explain select ËÏÌ0 from ÔÁÂ where ËÏÌ0=1;
|
|
drop table ÔÁÂ;
|
|
set names latin1;
|
|
|
|
# End of 4.1 tests
|
|
|
|
|
|
#
|
|
# Bug#15463: EXPLAIN SELECT..INTO hangs the client (QB, command line)
|
|
#
|
|
--disable_cursor_protocol
|
|
select 3 into @v1;
|
|
--enable_cursor_protocol
|
|
explain select 3 into @v1;
|
|
|
|
#
|
|
# Bug#22331: Wrong WHERE in EXPLAIN EXTENDED when all expressions were
|
|
# optimized away.
|
|
#
|
|
create table t1(f1 int, f2 int);
|
|
insert into t1 values (1,1);
|
|
create view v1 as select * from t1 where f1=1;
|
|
explain extended select * from v1 where f2=1;
|
|
explain extended select * from t1 where 0;
|
|
explain extended select * from t1 where 1;
|
|
explain extended select * from t1 having 0;
|
|
explain extended select * from t1 having 1;
|
|
drop view v1;
|
|
drop table t1;
|
|
|
|
#
|
|
# Bug #32241: memory corruption due to large index map in 'Range checked for
|
|
# each record'
|
|
#
|
|
|
|
CREATE TABLE t1(c INT);
|
|
INSERT INTO t1 VALUES (),();
|
|
|
|
CREATE TABLE t2 (b INT,
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b));
|
|
|
|
INSERT INTO t2 VALUES (),(),();
|
|
|
|
# We only need to make sure that there is no buffer overrun and the index map
|
|
# is displayed correctly
|
|
--replace_column 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X
|
|
EXPLAIN SELECT 1 FROM
|
|
(SELECT 1 FROM t2,t1 WHERE b < c GROUP BY 1 LIMIT 1) AS d2;
|
|
DROP TABLE t2;
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Bug #34773: query with explain extended and derived table / other table
|
|
# crashes server
|
|
#
|
|
|
|
CREATE TABLE t1(a INT);
|
|
CREATE TABLE t2(a INT);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
INSERT INTO t2 VALUES (1),(2);
|
|
|
|
EXPLAIN EXTENDED SELECT 1
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
|
|
|
|
EXPLAIN EXTENDED SELECT 1
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
|
|
|
|
prepare s1 from
|
|
'EXPLAIN EXTENDED SELECT 1
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
|
|
execute s1;
|
|
|
|
prepare s1 from
|
|
'EXPLAIN EXTENDED SELECT 1
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
|
|
execute s1;
|
|
execute s1;
|
|
|
|
DROP TABLE t1,t2;
|
|
|
|
|
|
#
|
|
# Bug #43354: Use key hint can crash server in explain extended query
|
|
#
|
|
|
|
CREATE TABLE t1 (a INT PRIMARY KEY);
|
|
|
|
--error ER_KEY_DOES_NOT_EXISTS
|
|
EXPLAIN EXTENDED SELECT COUNT(a) FROM t1 USE KEY(a);
|
|
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Bug#45989 memory leak after explain encounters an error in the query
|
|
#
|
|
CREATE TABLE t1(a LONGTEXT);
|
|
INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
|
|
INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
|
|
--error ER_BAD_FIELD_ERROR
|
|
EXPLAIN SELECT DISTINCT 1 FROM t1,
|
|
(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
|
|
WHERE t1.a = d1.a;
|
|
DROP TABLE t1;
|
|
|
|
--echo #
|
|
--echo # Bug#48295:
|
|
--echo # explain extended crash with subquery and ONLY_FULL_GROUP_BY sql_mode
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (f1 INT not null);
|
|
|
|
--disable_cursor_protocol
|
|
SELECT @@session.sql_mode INTO @old_sql_mode;
|
|
--enable_cursor_protocol
|
|
SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
|
|
|
|
# EXPLAIN EXTENDED (with subselect). used to crash. should give NOTICE.
|
|
# Before moving max/min optimization to optimize phase this statement
|
|
# generated error, but as far as original query do not contain aggregate
|
|
# function user should not see error
|
|
# --error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
|
|
EXPLAIN EXTENDED SELECT 1 FROM t1
|
|
WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t );
|
|
|
|
SET SESSION sql_mode=@old_sql_mode;
|
|
|
|
DROP TABLE t1;
|
|
|
|
--echo End of 5.0 tests.
|
|
|
|
--echo #
|
|
--echo # Bug#37870: Usage of uninitialized value caused failed assertion.
|
|
--echo #
|
|
create table t1 (dt datetime not null, t time not null);
|
|
create table t2 (dt datetime not null);
|
|
insert into t1 values ('2001-01-01 1:1:1', '1:1:1'),
|
|
('2001-01-01 1:1:1', '1:1:1');
|
|
insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
|
|
SET @save_join_cache_level=@@join_cache_level;
|
|
SET join_cache_level=0;
|
|
flush tables;
|
|
EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
|
|
flush tables;
|
|
SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
|
|
flush tables;
|
|
EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' );
|
|
flush tables;
|
|
SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' );
|
|
SET join_cache_level=@save_join_cache_level;
|
|
drop tables t1, t2;
|
|
|
|
--echo #
|
|
--echo # Bug#47669: Query showed by EXPLAIN EXTENDED gives different result from original query
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (c int);
|
|
INSERT INTO t1 VALUES (NULL);
|
|
CREATE TABLE t2 (d int);
|
|
INSERT INTO t2 VALUES (NULL), (0);
|
|
EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1;
|
|
DROP TABLE t1, t2;
|
|
|
|
--echo #
|
|
--echo # Bug#30302: Tables that were optimized away are printed in the
|
|
--echo # EXPLAIN EXTENDED warning.
|
|
--echo #
|
|
create table t1(f1 int);
|
|
create table t2(f2 int);
|
|
insert into t1 values(1);
|
|
insert into t2 values(1),(2);
|
|
explain extended select * from t1 where f1=1;
|
|
explain extended select * from t1 join t2 on f1=f2 where f1=1;
|
|
drop table t1,t2;
|
|
|
|
--echo #
|
|
--echo # Bug #48419: another explain crash..
|
|
--echo #
|
|
CREATE TABLE t1 (a INT);
|
|
CREATE TABLE t2 (b BLOB, KEY b(b(100)));
|
|
INSERT INTO t2 VALUES ('1'), ('2'), ('3');
|
|
|
|
FLUSH TABLES;
|
|
|
|
EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a);
|
|
|
|
DROP TABLE t1, t2;
|
|
|
|
--echo #
|
|
--echo # Bug #48573: difference of index selection between rpm binary and
|
|
--echo # .tar.gz, windows vs linux..
|
|
--echo #
|
|
|
|
CREATE TABLE t1(c1 INT, c2 INT, c4 INT, c5 INT, KEY(c2, c5), KEY(c2, c4, c5));
|
|
INSERT INTO t1 VALUES(4, 1, 1, 1);
|
|
INSERT INTO t1 VALUES(3, 1, 1, 1);
|
|
INSERT INTO t1 VALUES(2, 1, 1, 1);
|
|
INSERT INTO t1 VALUES(1, 1, 1, 1);
|
|
INSERT INTO t1 VALUES(5, 2, 1, 1);
|
|
INSERT INTO t1 VALUES(6, 2, 1, 1);
|
|
INSERT INTO t1 VALUES(7, 3, 1, 1);
|
|
INSERT INTO t1 VALUES(9, 3, 1, 1);
|
|
INSERT INTO t1 VALUES(10, 4, 1, 1);
|
|
INSERT INTO t1 VALUES(11, 4, 1, 1);
|
|
|
|
EXPLAIN SELECT c1 FROM t1 WHERE c2 = 1 AND c4 = 1 AND c5 = 1;
|
|
|
|
DROP TABLE t1;
|
|
|
|
--echo #
|
|
--echo # Bug#56814 Explain + subselect + fulltext crashes server
|
|
--echo #
|
|
|
|
CREATE TABLE t1(f1 VARCHAR(6) NOT NULL,
|
|
FULLTEXT KEY(f1),UNIQUE(f1));
|
|
INSERT INTO t1 VALUES ('test');
|
|
|
|
EXPLAIN SELECT 1 FROM t1
|
|
WHERE 1 > ALL((SELECT t1.f1 FROM t1 JOIN t1 a ON (MATCH(t1.f1) AGAINST (""))
|
|
WHERE t1.f1 GROUP BY t1.f1));
|
|
|
|
PREPARE stmt FROM
|
|
'EXPLAIN SELECT 1 FROM t1
|
|
WHERE 1 > ALL((SELECT t1.f1 FROM t1 RIGHT OUTER JOIN t1 a
|
|
ON (MATCH(t1.f1) AGAINST (""))
|
|
WHERE t1.f1 GROUP BY t1.f1))';
|
|
|
|
EXECUTE stmt;
|
|
EXECUTE stmt;
|
|
|
|
DEALLOCATE PREPARE stmt;
|
|
|
|
PREPARE stmt FROM
|
|
'EXPLAIN SELECT 1 FROM t1
|
|
WHERE 1 > ALL((SELECT t1.f1 FROM t1 JOIN t1 a
|
|
ON (MATCH(t1.f1) AGAINST (""))
|
|
WHERE t1.f1 GROUP BY t1.f1))';
|
|
|
|
EXECUTE stmt;
|
|
EXECUTE stmt;
|
|
|
|
DEALLOCATE PREPARE stmt;
|
|
|
|
DROP TABLE t1;
|
|
|
|
--echo End of 5.1 tests.
|
|
|
|
--echo #
|
|
--echo # Bug#11829785 EXPLAIN EXTENDED CRASH WITH RIGHT OUTER JOIN, SUBQUERIES
|
|
--echo #
|
|
|
|
CREATE TABLE t1(a INT);
|
|
|
|
INSERT INTO t1 VALUES (0), (0);
|
|
|
|
PREPARE s FROM
|
|
'EXPLAIN EXTENDED
|
|
SELECT SUBSTRING(1, (SELECT 1 FROM t1 a1 RIGHT OUTER JOIN t1 ON 0)) AS d
|
|
FROM t1 WHERE 0 > ANY (SELECT @a FROM t1)';
|
|
|
|
--error ER_SUBQUERY_NO_1_ROW
|
|
EXECUTE s;
|
|
|
|
DEALLOCATE PREPARE s;
|
|
DROP TABLE t1;
|
|
|
|
--echo #
|
|
--echo # Bug#776295: EXPLAIN EXTENDED with always false multiple equality
|
|
--echo # in the WHERE condition of a derived table
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (a int) ;
|
|
|
|
CREATE TABLE t2 (a int) ;
|
|
INSERT INTO t2 VALUES (8);
|
|
|
|
set @tmp_optimizer_switch=@@optimizer_switch;
|
|
set optimizer_switch='derived_merge=off,derived_with_keys=off';
|
|
EXPLAIN EXTENDED
|
|
SELECT * FROM ( SELECT t1.a FROM t1,t2 WHERE t2.a = t1.a ) AS t;
|
|
set optimizer_switch=@tmp_optimizer_switch;
|
|
|
|
DROP TABLE t1,t2;
|
|
|
|
--echo #
|
|
--echo # MDEV-7215: EXPLAIN REPLACE produces an error:
|
|
--echo # Column count doesn't match value count
|
|
--echo #
|
|
create table t1 (a int);
|
|
insert into t1 values (1);
|
|
create table t2 (b int, c int);
|
|
|
|
replace into t2 select 100, (select a from t1);
|
|
explain replace into t2 select 100, (select a from t1);
|
|
#analyze replace into t2 select 100, (select a from t1);
|
|
|
|
drop table t1, t2;
|
|
|
|
--echo # End of 10.1 tests
|
|
|
|
--echo #
|
|
--echo # End of 10.2 test
|
|
--echo #
|
|
|
|
--echo #
|
|
--echo # MDEV-25564: Server crashed on running some EXPLAIN statements
|
|
--echo #
|
|
|
|
EXPLAIN (SELECT 1,3) UNION (SELECT 2,1) ORDER BY (SELECT 2);
|
|
|
|
--echo #
|
|
--echo # MDEV-23160: SIGSEGV in Explain_node::print_explain_for_children on UNION SELECT
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1),(2),(3);
|
|
|
|
EXPLAIN
|
|
SELECT *
|
|
FROM t1
|
|
WHERE
|
|
a IN (SELECT a FROM t1
|
|
UNION
|
|
SELECT a FROM t1 ORDER BY (SELECT a))
|
|
UNION
|
|
SELECT * FROM t1 ORDER BY (SELECT a);
|
|
drop table t1;
|
|
|
|
--disable_ps_protocol
|
|
explain
|
|
VALUES ( (VALUES (2))) UNION VALUES ( (SELECT 3));
|
|
--enable_ps_protocol
|
|
|
|
--echo #
|
|
--echo # End of 10.4 tests
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE TABLE t2 (b INT);
|
|
INSERT INTO t2 VALUES (3),(4);
|
|
|
|
EXPLAIN SELECT * FROM t1, t2 WHERE t2.b IN (SELECT 5 UNION SELECT 6);
|
|
EXPLAIN DELETE t2 FROM t1, t2 WHERE t2.b IN (SELECT 5 UNION SELECT 6);
|
|
prepare stmt from "EXPLAIN DELETE t2 FROM t1, t2 WHERE t2.b IN (SELECT 5 UNION SELECT 6)";
|
|
execute stmt;
|
|
execute stmt;
|
|
|
|
# Cleanup
|
|
|
|
DROP TABLE t1, t2;
|
|
|
|
--echo #
|
|
--echo # End of 10.5 tests
|
|
--echo #
|