mirror of
https://github.com/MariaDB/server.git
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269 lines
7.2 KiB
Plaintext
269 lines
7.2 KiB
Plaintext
#
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# Test of different EXPLAINs
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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create table t1 (id int not null, str char(10), unique(str));
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explain select * from t1;
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insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
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select * from t1 where str is null;
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select * from t1 where str="foo";
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explain select * from t1 where str is null;
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explain select * from t1 where str="foo";
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explain select * from t1 ignore key (str) where str="foo";
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explain select * from t1 use key (str,str) where str="foo";
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#The following should give errors
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--error 1176
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explain select * from t1 use key (str,str,foo) where str="foo";
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--error 1176
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explain select * from t1 ignore key (str,str,foo) where str="foo";
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drop table t1;
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explain select 1;
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create table t1 (a int not null);
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explain select count(*) from t1;
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insert into t1 values(1);
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explain select count(*) from t1;
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insert into t1 values(1);
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explain select count(*) from t1;
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drop table t1;
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#
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# Bug #3403 Wrong encoding in EXPLAIN SELECT output
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#
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set names koi8r;
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create table ÔÁÂ (ËÏÌ0 int, ËÏÌ1 int, key ÉÎÄ0 (ËÏÌ0), key ÉÎÄ01 (ËÏÌ0,ËÏÌ1));
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insert into ÔÁÂ (ËÏÌ0) values (1);
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insert into ÔÁÂ (ËÏÌ0) values (2);
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explain select ËÏÌ0 from ÔÁÂ where ËÏÌ0=1;
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drop table ÔÁÂ;
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set names latin1;
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# End of 4.1 tests
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#
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# Bug#15463: EXPLAIN SELECT..INTO hangs the client (QB, command line)
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#
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select 3 into @v1;
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explain select 3 into @v1;
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#
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# Bug#22331: Wrong WHERE in EXPLAIN EXTENDED when all expressions were
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# optimized away.
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#
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create table t1(f1 int, f2 int);
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insert into t1 values (1,1);
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create view v1 as select * from t1 where f1=1;
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explain extended select * from v1 where f2=1;
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explain extended select * from t1 where 0;
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explain extended select * from t1 where 1;
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explain extended select * from t1 having 0;
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explain extended select * from t1 having 1;
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drop view v1;
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drop table t1;
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#
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# Bug #32241: memory corruption due to large index map in 'Range checked for
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# each record'
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#
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CREATE TABLE t1(c INT);
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INSERT INTO t1 VALUES (),();
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CREATE TABLE t2 (b INT,
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b));
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INSERT INTO t2 VALUES (),(),();
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# We only need to make sure that there is no buffer overrun and the index map
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# is displayed correctly
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--replace_column 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 X 9 X
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EXPLAIN SELECT 1 FROM
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(SELECT 1 FROM t2,t1 WHERE b < c GROUP BY 1 LIMIT 1) AS d2;
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DROP TABLE t2;
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DROP TABLE t1;
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#
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# Bug #34773: query with explain extended and derived table / other table
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# crashes server
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#
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CREATE TABLE t1(a INT);
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CREATE TABLE t2(a INT);
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INSERT INTO t1 VALUES (1),(2);
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INSERT INTO t2 VALUES (1),(2);
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EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
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EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
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prepare s1 from
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'EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
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execute s1;
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prepare s1 from
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'EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
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execute s1;
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execute s1;
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DROP TABLE t1,t2;
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#
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# Bug #43354: Use key hint can crash server in explain extended query
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#
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CREATE TABLE t1 (a INT PRIMARY KEY);
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--error ER_KEY_DOES_NOT_EXITS
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EXPLAIN EXTENDED SELECT COUNT(a) FROM t1 USE KEY(a);
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DROP TABLE t1;
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#
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# Bug#45989 memory leak after explain encounters an error in the query
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#
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CREATE TABLE t1(a LONGTEXT);
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INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
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INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
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--error ER_BAD_FIELD_ERROR
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EXPLAIN SELECT DISTINCT 1 FROM t1,
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(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
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WHERE t1.a = d1.a;
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DROP TABLE t1;
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--echo #
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--echo # Bug#48295:
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--echo # explain extended crash with subquery and ONLY_FULL_GROUP_BY sql_mode
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--echo #
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CREATE TABLE t1 (f1 INT);
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SELECT @@session.sql_mode INTO @old_sql_mode;
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SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
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# EXPLAIN EXTENDED (with subselect). used to crash.
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# This is actually a valid query for this sql_mode,
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# but it was transformed in such a way that it failed, see
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# Bug#12329653 - EXPLAIN, UNION, PREPARED STATEMENT, CRASH, SQL_FULL_GROUP_BY
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EXPLAIN EXTENDED SELECT 1 FROM t1
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WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t );
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SET SESSION sql_mode=@old_sql_mode;
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DROP TABLE t1;
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--echo End of 5.0 tests.
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--echo #
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--echo # Bug#37870: Usage of uninitialized value caused failed assertion.
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--echo #
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create table t1 (dt datetime not null, t time not null);
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create table t2 (dt datetime not null);
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insert into t1 values ('2001-01-01 1:1:1', '1:1:1'),
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('2001-01-01 1:1:1', '1:1:1');
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insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
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flush tables;
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EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
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flush tables;
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SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
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flush tables;
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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' );
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flush tables;
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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' );
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drop tables t1, t2;
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--echo #
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--echo # Bug#47669: Query showed by EXPLAIN EXTENDED gives different result from original query
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--echo #
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CREATE TABLE t1 (c int);
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INSERT INTO t1 VALUES (NULL);
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CREATE TABLE t2 (d int);
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INSERT INTO t2 VALUES (NULL), (0);
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EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1;
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DROP TABLE t1, t2;
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--echo #
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--echo # Bug #48419: another explain crash..
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--echo #
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CREATE TABLE t1 (a INT);
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CREATE TABLE t2 (b BLOB, KEY b(b(100)));
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INSERT INTO t2 VALUES ('1'), ('2'), ('3');
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FLUSH TABLES;
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EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a);
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DROP TABLE t1, t2;
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--echo #
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--echo # Bug #48573: difference of index selection between rpm binary and
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--echo # .tar.gz, windows vs linux..
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--echo #
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CREATE TABLE t1(c1 INT, c2 INT, c4 INT, c5 INT, KEY(c2, c5), KEY(c2, c4, c5));
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INSERT INTO t1 VALUES(4, 1, 1, 1);
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INSERT INTO t1 VALUES(3, 1, 1, 1);
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INSERT INTO t1 VALUES(2, 1, 1, 1);
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INSERT INTO t1 VALUES(1, 1, 1, 1);
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EXPLAIN SELECT c1 FROM t1 WHERE c2 = 1 AND c4 = 1 AND c5 = 1;
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DROP TABLE t1;
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--echo #
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--echo # Bug#56814 Explain + subselect + fulltext crashes server
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--echo #
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CREATE TABLE t1(f1 VARCHAR(6) NOT NULL,
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FULLTEXT KEY(f1),UNIQUE(f1));
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INSERT INTO t1 VALUES ('test');
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EXPLAIN SELECT 1 FROM t1
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WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a ON (MATCH(t1.f1) AGAINST (""))
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WHERE t1.f1 GROUP BY t1.f1));
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PREPARE stmt FROM
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'EXPLAIN SELECT 1 FROM t1
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WHERE 1 > ALL((SELECT 1 FROM t1 RIGHT OUTER JOIN t1 a
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ON (MATCH(t1.f1) AGAINST (""))
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WHERE t1.f1 GROUP BY t1.f1))';
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EXECUTE stmt;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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PREPARE stmt FROM
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'EXPLAIN SELECT 1 FROM t1
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WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a
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ON (MATCH(t1.f1) AGAINST (""))
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WHERE t1.f1 GROUP BY t1.f1))';
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EXECUTE stmt;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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DROP TABLE t1;
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--echo End of 5.1 tests.
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