mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 02:46:29 +01:00
972 lines
30 KiB
Text
972 lines
30 KiB
Text
SET @save_innodb_stats_persistent=@@GLOBAL.innodb_stats_persistent;
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SET GLOBAL innodb_stats_persistent=0;
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#
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# MDEV-16917: do not use splitting for derived with join cache
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#
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CREATE TABLE t1 (
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n1 int(10) NOT NULL,
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n2 int(10) NOT NULL,
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c1 char(1) NOT NULL,
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KEY c1 (c1),
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KEY n1_c1_n2 (n1,c1,n2)
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) ENGINE=InnoDB CHARSET=latin1;
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INSERT INTO t1 VALUES (0, 2, 'a'), (1, 3, 'a');
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insert into t1 select seq+1,seq+2,'c' from seq_1_to_1000;
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ANALYZE TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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EXPLAIN SELECT t1.n1 FROM t1, (SELECT n1, n2 FROM t1 WHERE c1 = 'a' GROUP BY n1) as t
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WHERE t.n1 = t1.n1 AND t.n2 = t1.n2 AND c1 = 'a' GROUP BY n1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ref c1,n1_c1_n2 c1 1 const 2 Using index condition; Using where; Using temporary; Using filesort
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1 PRIMARY <derived2> ref key0 key0 8 test.t1.n1,test.t1.n2 1
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2 LATERAL DERIVED t1 ref c1,n1_c1_n2 n1_c1_n2 4 test.t1.n1 1 Using where; Using index
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SELECT t1.n1 FROM t1, (SELECT n1, n2 FROM t1 WHERE c1 = 'a' GROUP BY n1) as t
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WHERE t.n1 = t1.n1 AND t.n2 = t1.n2 AND c1 = 'a' GROUP BY n1;
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n1
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0
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1
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DROP TABLE t1;
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#
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# MDEV-17211: splittable materialized derived joining 3 tables with
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# GROUP BY list containing fields from 2 of them
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#
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CREATE TABLE t1 (
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id1 int, i1 int, id2 int,
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PRIMARY KEY (id1), KEY (i1), KEY (id2)
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) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1,1,1);
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CREATE TABLE t2 (id2 int, i2 int) ENGINE=InnoDB;
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INSERT INTO t2 VALUES (1, 1);
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CREATE TABLE t3 (id3 int, i3 int, PRIMARY KEY (id3)) ENGINE=InnoDB;
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INSERT INTO t3 VALUES (1,1);
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EXPLAIN SELECT id3
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FROM (SELECT t3.id3, t2.i2, t1.id2 FROM t3,t1,t2
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WHERE t3.i3=t1.id1 AND t2.id2=t1.id2
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GROUP BY t3.id3, t1.id2) AS t,
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t2
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WHERE t2.id2=t.id2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id2 1
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2 DERIVED t3 ALL NULL NULL NULL NULL 1 Using where; Using temporary; Using filesort
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2 DERIVED t1 eq_ref PRIMARY,id2 PRIMARY 4 test.t3.i3 1
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2 DERIVED t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
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SELECT id3
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FROM (SELECT t3.id3, t2.i2, t1.id2 FROM t3,t1,t2
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WHERE t3.i3=t1.id1 AND t2.id2=t1.id2
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GROUP BY t3.id3, t1.id2) AS t,
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t2
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WHERE t2.id2=t.id2;
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id3
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1
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DROP TABLE t1,t2,t3;
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#
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# Bug mdev-17381: equi-join of derived table with join_cache_level=4
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#
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CREATE TABLE t1 (
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id int NOT NULL,
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amount decimal DEFAULT NULL,
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PRIMARY KEY (id)
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) ENGINE=INNODB;
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CREATE TABLE t2 (
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id int NOT NULL,
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name varchar(50) DEFAULT NULL,
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PRIMARY KEY (id)
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) ENGINE=INNODB;
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INSERT INTO t1 VALUES
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(1, 10.0000), (2, 20.0000), (3, 30.0000), (4, 40.0000),
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(5, NULL), (6, NULL), (7, 70.0000), (8, 80.0000);
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INSERT INTO t2 VALUES
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(1,'A'), (2,'B'), (3,'C'), (4,'D'), (5, NULL), (6, NULL),
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(7,'E'), (8,'F'), (9,'G'), (10,'H'), (11, NULL), (12, NULL);
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set join_cache_level=4;
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SELECT t2.id,t2.name,t.total_amt
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FROM t2
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LEFT JOIN
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(SELECT id, sum(amount) total_amt FROM t1 GROUP BY id) AS t
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ON t2.id=t.id
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WHERE t2.id < 3;
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id name total_amt
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1 A 10
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2 B 20
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EXPLAIN SELECT t2.id,t2.name,t.total_amt
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FROM t2
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LEFT JOIN
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(SELECT id, sum(amount) total_amt FROM t1 GROUP BY id) AS t
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ON t2.id=t.id
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WHERE t2.id < 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id 1
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2 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 4 test.t2.id 1
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set join_cache_level=default;
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DROP TABLE t1,t2;
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#
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# Bug mdev-18467: join of grouping view and a base table as inner operand
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# of left join with on condition containing impossible range
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#
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create table t1 (f1 int, f2 int, key(f2)) engine=InnoDB;
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insert into t1 values (3,33), (7,77), (1,11);
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create table t2 (f1 int, f2 int, primary key (f1)) engine=InnoDB;
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insert into t2 values (3,33), (9,99), (1,11);
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create view v1 as
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select f1, max(f2) as f2 from t2 group by f1;
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select t.f2
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from t1
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left join
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(v1 join t1 as t on v1.f1=t.f1 and t.f2 = null)
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on t1.f1=t.f1;
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f2
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NULL
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NULL
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NULL
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explain select t.f2
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from t1
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left join
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(v1 join t1 as t on v1.f1=t.f1 and t.f2 = null)
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on t1.f1=t.f1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t const f2 NULL NULL NULL 0 Impossible ON condition
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1 PRIMARY <derived2> const key0,key1 NULL NULL NULL 0 Impossible ON condition
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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2 DERIVED t2 ALL PRIMARY NULL NULL NULL 3 Using temporary; Using filesort
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set statement optimizer_switch='split_materialized=off' for explain select t.f2
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from t1
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left join
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(v1 join t1 as t on v1.f1=t.f1 and t.f2 = null)
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on t1.f1=t.f1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t const f2 NULL NULL NULL 0 Impossible ON condition
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1 PRIMARY <derived3> const key0,key1 NULL NULL NULL 0 Impossible ON condition
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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3 DERIVED t2 index NULL PRIMARY 4 NULL 3
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drop view v1;
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drop table t1,t2;
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#
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# MDEV-23723: Crash when test_if_skip_sort_order() is checked for derived table subject to split
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#
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CREATE TABLE t1 (a INT, b INT, KEY (a), KEY (a,b)) ENGINE=InnoDB;
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CREATE TABLE t2 (c INT, KEY (c)) ENGINE=InnoDB;
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SELECT * FROM t1 t1a JOIN t1 t1b;
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a b a b
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INSERT INTO t2 VALUES (1),(2);
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INSERT INTO t1 VALUES (1,2),(3,4),(5,6),(7,8),(9,10),(11,12);
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set statement optimizer_switch='split_materialized=off' for EXPLAIN
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SELECT *
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FROM
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t1 JOIN
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(SELECT t1_inner.a, t1_inner.b FROM t1 as t1_inner, t2 as t2_inner WHERE t1_inner.b = t2_inner.c GROUP BY t1_inner.a, t1_inner.b) as dt
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WHERE
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t1.a = dt.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 index a,a_2 a_2 10 NULL 6 Using where; Using index
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1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 1
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3 DERIVED t1_inner index NULL a_2 10 NULL 6 Using where; Using index
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3 DERIVED t2_inner ref c c 5 test.t1_inner.b 1 Using index
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set statement optimizer_switch='split_materialized=on' for EXPLAIN
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SELECT *
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FROM
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t1 JOIN
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(SELECT t1_inner.a, t1_inner.b FROM t1 as t1_inner, t2 as t2_inner WHERE t1_inner.b = t2_inner.c GROUP BY t1_inner.a, t1_inner.b) as dt
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WHERE
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t1.a = dt.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 index a,a_2 a_2 10 NULL 6 Using where; Using index
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1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 1
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3 DERIVED t1_inner index a,a_2 a_2 10 NULL 6 Using where; Using index
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3 DERIVED t2_inner ref c c 5 test.t1_inner.b 1 Using index
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DROP TABLE t1, t2;
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#
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# Bug mdev-25714: usage non-splitting covering index is cheaper than
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# usage of the best splitting index for one group
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#
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create table t1 (
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id int not null, itemid int not null, index idx (itemid)
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) engine=innodb;
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insert into t1 values (1, 2), (2,2), (4,2), (4,2), (0,3), (3,3);
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create table t2 (id int not null) engine=innodb;
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insert into t2 values (2);
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create table t3 (
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id int not null, itemid int not null, userid int not null, primary key (id),
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index idx1 (userid, itemid), index idx2 (itemid)
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) engine innodb;
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insert into t3 values (1,1,1), (2,1,1), (3,2,1), (4,2,1), (5,3,1);
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set use_stat_tables='never';
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set optimizer_use_condition_selectivity=1;
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analyze table t1,t2,t3;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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test.t2 analyze status OK
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test.t3 analyze status OK
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set optimizer_switch='split_materialized=on';
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explain select t1.id, t1.itemid, dt.id, t2.id
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from t1,
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(select itemid, max(id) as id from t3 where userid = 1 group by itemid) dt,
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t2
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where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 1
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1 PRIMARY <derived2> ref key1 key1 4 test.t2.id 1
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1 PRIMARY t1 ref idx idx 4 test.t2.id 3 Using where
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2 DERIVED t3 ref idx1,idx2 idx1 4 const 5 Using where; Using index
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select t1.id, t1.itemid, dt.id, t2.id
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from t1,
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(select itemid, max(id) as id from t3 where userid = 1 group by itemid) dt,
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t2
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where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;
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id itemid id id
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4 2 4 2
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4 2 4 2
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set optimizer_switch='split_materialized=off';
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explain select t1.id, t1.itemid, dt.id, t2.id
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from t1,
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(select itemid, max(id) as id from t3 where userid = 1 group by itemid) dt,
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t2
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where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 1
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1 PRIMARY <derived2> ref key1 key1 4 test.t2.id 1
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1 PRIMARY t1 ref idx idx 4 test.t2.id 3 Using where
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2 DERIVED t3 ref idx1 idx1 4 const 5 Using where; Using index
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select t1.id, t1.itemid, dt.id, t2.id
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from t1,
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(select itemid, max(id) as id from t3 where userid = 1 group by itemid) dt,
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t2
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where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;
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id itemid id id
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4 2 4 2
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4 2 4 2
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drop table t1,t2,t3;
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set optimizer_switch='split_materialized=default';
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set use_stat_tables=default;
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set optimizer_use_condition_selectivity=default;
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#
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# MDEV-26337: subquery with groupby and ROLLUP returns incorrect results
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# (The testcase is taken from testcase for MDEV-13389 due to it being
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# much smaller)
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#
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create table t3 (a int, b int, c char(127), index idx_b(b)) engine=myisam charset=latin1;
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insert into t3 values
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(8,11,'aa'), (5,15,'cc'), (1,14,'bb'), (2,12,'aa'), (7,17,'cc'),
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(7,18,'aa'), (2,11,'aa'), (7,10,'bb'), (3,11,'dd'), (4,12,'ee'),
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(5,14,'dd'), (9,12,'ee');
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create table t4 (a int, b int, c char(127), index idx(a,c)) engine=myisam charset=latin1;
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insert into t4 values
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(7,10,'cc'), (1,20,'aa'), (2,23,'bb'), (7,18,'cc'), (1,30,'bb'),
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(4,71,'xx'), (3,15,'aa'), (7,82,'aa'), (8,12,'dd'), (4,15,'aa'),
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(11,33,'yy'), (10,42,'zz'), (4,53,'xx'), (10,17,'yy'), (7,12,'cc'),
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(8,20,'dd'), (7,32,'bb'), (1,50,'aa'), (3,40,'bb'), (3,77,'aa');
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insert into t4 select a+10, b+10, concat(c,'f') from t4;
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analyze table t3,t4;
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Table Op Msg_type Msg_text
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test.t3 analyze status Engine-independent statistics collected
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test.t3 analyze status OK
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test.t4 analyze status Engine-independent statistics collected
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test.t4 analyze status OK
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# This should use a plan with LATERAL DERIVED:
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explain select t3.a,t3.c,t.max,t.min
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from t3 join
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(select a, c, max(b) max, min(b) min from t4 group by a,c) t
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on t3.a=t.a and t3.c=t.c
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where t3.b > 15;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 range idx_b idx_b 5 NULL 2 Using index condition; Using where
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1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 1
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2 LATERAL DERIVED t4 ref idx idx 133 test.t3.a,test.t3.c 1
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# ... and if one adds WITH ROLLUP, then LATERAL DERIVED is no longer used:
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explain select t3.a,t3.c,t.max,t.min
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from t3 join
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(select a, c, max(b) max, min(b) min from t4 group by a,c with rollup) t
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on t3.a=t.a and t3.c=t.c
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where t3.b > 15;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 range idx_b idx_b 5 NULL 2 Using index condition; Using where
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1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 2
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2 DERIVED t4 ALL NULL NULL NULL NULL 40 Using filesort
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drop table t3, t4;
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# End of 10.3 tests
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#
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# MDEV-26301: Split optimization refills temporary table too many times
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#
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create table t1(a int, b int);
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insert into t1 select seq,seq from seq_1_to_5;
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create table t2(a int, b int, key(a));
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insert into t2
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select A.seq,B.seq from seq_1_to_25 A, seq_1_to_2 B;
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create table t3(a int, b int, key(a));
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insert into t3
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select A.seq,B.seq from seq_1_to_5 A, seq_1_to_3 B;
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analyze table t1,t2,t3 persistent for all;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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test.t2 analyze status Engine-independent statistics collected
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test.t2 analyze status Table is already up to date
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test.t3 analyze status Engine-independent statistics collected
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test.t3 analyze status Table is already up to date
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explain
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select * from
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(t1 left join t2 on t2.a=t1.b) left join t3 on t3.a=t1.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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1 SIMPLE t2 ref a a 5 test.t1.b 2 Using where
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1 SIMPLE t3 ref a a 5 test.t1.b 3 Using where
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create table t10 (
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grp_id int,
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col1 int,
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key(grp_id)
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);
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insert into t10
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select
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A.seq,
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B.seq
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from
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seq_1_to_100 A,
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seq_1_to_100 B;
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create table t11 (
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col1 int,
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col2 int
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);
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insert into t11
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select A.seq, A.seq from seq_1_to_10 A;
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analyze table t10,t11 persistent for all;
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Table Op Msg_type Msg_text
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test.t10 analyze status Engine-independent statistics collected
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test.t10 analyze status Table is already up to date
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test.t11 analyze status Engine-independent statistics collected
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test.t11 analyze status OK
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explain select * from
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(
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(t1 left join t2 on t2.a=t1.b)
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left join t3 on t3.a=t1.b
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) left join (select grp_id, count(*)
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from t10 left join t11 on t11.col1=t10.col1
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group by grp_id) T on T.grp_id=t1.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5
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1 PRIMARY t2 ref a a 5 test.t1.b 2 Using where
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1 PRIMARY t3 ref a a 5 test.t1.b 3 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
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2 LATERAL DERIVED t10 ref grp_id grp_id 5 test.t1.b 100
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2 LATERAL DERIVED t11 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
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# The important part in the below output is:
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# "lateral": 1,
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# "query_block": {
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# "select_id": 2,
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# "r_loops": 5, <-- must be 5, not 30.
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analyze format=json select * from
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(
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(t1 left join t2 on t2.a=t1.b)
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left join t3 on t3.a=t1.b
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) left join (select grp_id, count(*)
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from t10 left join t11 on t11.col1=t10.col1
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group by grp_id) T on T.grp_id=t1.b;
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ANALYZE
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{
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"query_optimization": {
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"r_total_time_ms": "REPLACED"
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},
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"query_block": {
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"select_id": 1,
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"cost": "REPLACED",
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"const_condition": "1",
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"nested_loop": [
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{
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"table": {
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"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"loops": 1,
|
|
"r_loops": 1,
|
|
"rows": 5,
|
|
"r_rows": 5,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_total_filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t2",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.b"],
|
|
"loops": 5,
|
|
"r_loops": 5,
|
|
"rows": 2,
|
|
"r_rows": 2,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_total_filtered": 100,
|
|
"attached_condition": "trigcond(trigcond(t1.b is not null))",
|
|
"r_filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "t3",
|
|
"access_type": "ref",
|
|
"possible_keys": ["a"],
|
|
"key": "a",
|
|
"key_length": "5",
|
|
"used_key_parts": ["a"],
|
|
"ref": ["test.t1.b"],
|
|
"loops": 10,
|
|
"r_loops": 10,
|
|
"rows": 3,
|
|
"r_rows": 3,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_total_filtered": 100,
|
|
"attached_condition": "trigcond(trigcond(t1.b is not null))",
|
|
"r_filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"table": {
|
|
"table_name": "<derived2>",
|
|
"access_type": "ref",
|
|
"possible_keys": ["key0"],
|
|
"key": "key0",
|
|
"key_length": "5",
|
|
"used_key_parts": ["grp_id"],
|
|
"ref": ["test.t1.b"],
|
|
"loops": 30,
|
|
"r_loops": 30,
|
|
"rows": 10,
|
|
"r_rows": 1,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"filtered": 100,
|
|
"r_total_filtered": 100,
|
|
"attached_condition": "trigcond(trigcond(t1.b is not null))",
|
|
"r_filtered": 100,
|
|
"materialized": {
|
|
"lateral": 1,
|
|
"query_block": {
|
|
"select_id": 2,
|
|
"cost": "REPLACED",
|
|
"r_loops": 5,
|
|
"r_total_time_ms": "REPLACED",
|
|
"outer_ref_condition": "t1.b is not null",
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t10",
|
|
"access_type": "ref",
|
|
"possible_keys": ["grp_id"],
|
|
"key": "grp_id",
|
|
"key_length": "5",
|
|
"used_key_parts": ["grp_id"],
|
|
"ref": ["test.t1.b"],
|
|
"loops": 1,
|
|
"r_loops": 5,
|
|
"rows": 100,
|
|
"r_rows": 100,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_total_filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
},
|
|
{
|
|
"block-nl-join": {
|
|
"table": {
|
|
"table_name": "t11",
|
|
"access_type": "ALL",
|
|
"loops": 100,
|
|
"r_loops": 5,
|
|
"rows": 10,
|
|
"r_rows": 10,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_total_filtered": 100,
|
|
"r_filtered": 100
|
|
},
|
|
"buffer_type": "flat",
|
|
"buffer_size": "1Kb",
|
|
"join_type": "BNL",
|
|
"attached_condition": "trigcond(t11.col1 = t10.col1)",
|
|
"r_loops": 500,
|
|
"r_filtered": 10,
|
|
"r_unpack_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_effective_rows": 10
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
create table t21 (pk int primary key);
|
|
insert into t21 values (1),(2),(3);
|
|
create table t22 (pk int primary key);
|
|
insert into t22 values (1),(2),(3);
|
|
explain
|
|
select * from
|
|
t21, t22,
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join t3 on t3.a=t1.b
|
|
) left join (select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id) T on T.grp_id=t1.b
|
|
where
|
|
t21.pk=1 and t22.pk=2;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t21 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY t22 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
|
1 PRIMARY t2 ref a a 5 test.t1.b 2 Using where
|
|
1 PRIMARY t3 ref a a 5 test.t1.b 3 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
|
|
2 LATERAL DERIVED t10 ref grp_id grp_id 5 test.t1.b 100
|
|
2 LATERAL DERIVED t11 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
|
explain
|
|
select * from
|
|
t21,
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join t3 on t3.a=t1.b
|
|
) left join (select grp_id, count(*)
|
|
from
|
|
t22 join t10 left join t11 on t11.col1=t10.col1
|
|
where
|
|
t22.pk=1
|
|
group by grp_id) T on T.grp_id=t1.b
|
|
where
|
|
t21.pk=1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t21 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
|
1 PRIMARY t2 ref a a 5 test.t1.b 2 Using where
|
|
1 PRIMARY t3 ref a a 5 test.t1.b 3 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
|
|
2 LATERAL DERIVED t22 const PRIMARY PRIMARY 4 const 1 Using index
|
|
2 LATERAL DERIVED t10 ref grp_id grp_id 5 test.t1.b 100
|
|
2 LATERAL DERIVED t11 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
|
create table t5 (
|
|
pk int primary key
|
|
);
|
|
insert into t5 select seq from seq_1_to_1000;
|
|
explain
|
|
select * from
|
|
t21,
|
|
(
|
|
(((t1 join t5 on t5.pk=t1.b)) left join t2 on t2.a=t1.b)
|
|
left join t3 on t3.a=t1.b
|
|
) left join (select grp_id, count(*)
|
|
from
|
|
t22 join t10 left join t11 on t11.col1=t10.col1
|
|
where
|
|
t22.pk=1
|
|
group by grp_id) T on T.grp_id=t1.b
|
|
where
|
|
t21.pk=1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t21 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
|
|
1 PRIMARY t5 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index
|
|
1 PRIMARY t2 ref a a 5 test.t1.b 2
|
|
1 PRIMARY t3 ref a a 5 test.t1.b 3
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
|
|
2 LATERAL DERIVED t22 const PRIMARY PRIMARY 4 const 1 Using index
|
|
2 LATERAL DERIVED t10 ref grp_id grp_id 5 test.t5.pk 100 Using index condition
|
|
2 LATERAL DERIVED t11 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
|
drop table t1,t2,t3,t5, t10, t11, t21, t22;
|
|
create table t1(a int, b int);
|
|
insert into t1 select seq,seq from seq_1_to_5;
|
|
create table t2(a int, b int, key(a));
|
|
insert into t2
|
|
select A.seq,B.seq from seq_1_to_25 A, seq_1_to_2 B;
|
|
create table t3(a int, b int, key(a));
|
|
insert into t3
|
|
select A.seq,B.seq from seq_1_to_5 A, seq_1_to_3 B;
|
|
analyze table t1,t2,t3 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status OK
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status Table is already up to date
|
|
test.t3 analyze status Engine-independent statistics collected
|
|
test.t3 analyze status Table is already up to date
|
|
create table t10 (
|
|
grp_id int,
|
|
col1 int,
|
|
key(grp_id)
|
|
);
|
|
insert into t10
|
|
select
|
|
A.seq,
|
|
B.seq
|
|
from
|
|
seq_1_to_100 A,
|
|
seq_1_to_100 B;
|
|
create table t11 (
|
|
col1 int,
|
|
col2 int
|
|
);
|
|
insert into t11
|
|
select A.seq, A.seq from seq_1_to_10 A;
|
|
analyze table t10,t11 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t10 analyze status Engine-independent statistics collected
|
|
test.t10 analyze status Table is already up to date
|
|
test.t11 analyze status Engine-independent statistics collected
|
|
test.t11 analyze status OK
|
|
explain select *
|
|
from
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join
|
|
t3
|
|
on t3.a=t1.b
|
|
)
|
|
left join
|
|
(
|
|
select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id
|
|
)dt
|
|
on dt.grp_id=t1.b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
|
1 PRIMARY t2 ref a a 5 test.t1.b 2 Using where
|
|
1 PRIMARY t3 ref a a 5 test.t1.b 3 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
|
|
2 LATERAL DERIVED t10 ref grp_id grp_id 5 test.t1.b 100
|
|
2 LATERAL DERIVED t11 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
|
select *
|
|
from
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join
|
|
t3
|
|
on t3.a=t1.b
|
|
)
|
|
left join
|
|
(
|
|
select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id
|
|
)dt
|
|
on dt.grp_id=t1.b;
|
|
a b a b a b grp_id count(*)
|
|
1 1 1 1 1 1 1 100
|
|
1 1 1 1 1 2 1 100
|
|
1 1 1 1 1 3 1 100
|
|
1 1 1 2 1 1 1 100
|
|
1 1 1 2 1 2 1 100
|
|
1 1 1 2 1 3 1 100
|
|
2 2 2 1 2 1 2 100
|
|
2 2 2 1 2 2 2 100
|
|
2 2 2 1 2 3 2 100
|
|
2 2 2 2 2 1 2 100
|
|
2 2 2 2 2 2 2 100
|
|
2 2 2 2 2 3 2 100
|
|
3 3 3 1 3 1 3 100
|
|
3 3 3 1 3 2 3 100
|
|
3 3 3 1 3 3 3 100
|
|
3 3 3 2 3 1 3 100
|
|
3 3 3 2 3 2 3 100
|
|
3 3 3 2 3 3 3 100
|
|
4 4 4 1 4 1 4 100
|
|
4 4 4 1 4 2 4 100
|
|
4 4 4 1 4 3 4 100
|
|
4 4 4 2 4 1 4 100
|
|
4 4 4 2 4 2 4 100
|
|
4 4 4 2 4 3 4 100
|
|
5 5 5 1 5 1 5 100
|
|
5 5 5 1 5 2 5 100
|
|
5 5 5 1 5 3 5 100
|
|
5 5 5 2 5 1 5 100
|
|
5 5 5 2 5 2 5 100
|
|
5 5 5 2 5 3 5 100
|
|
set join_cache_level=4;
|
|
set optimizer_trace=1;
|
|
set @tmp=@@optimizer_switch, optimizer_switch='hash_join_cardinality=off';
|
|
insert into t11
|
|
select A.seq, A.seq from seq_11_to_100 A;
|
|
analyze table t11 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t11 analyze status Engine-independent statistics collected
|
|
test.t11 analyze status OK
|
|
explain select *
|
|
from
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join
|
|
t3
|
|
on t3.a=t1.b
|
|
)
|
|
left join
|
|
(
|
|
select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id
|
|
)dt
|
|
on dt.grp_id=t1.b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
|
1 PRIMARY t2 ref a a 5 test.t1.b 2 Using where
|
|
1 PRIMARY t3 ref a a 5 test.t1.b 3 Using where
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
|
|
2 LATERAL DERIVED t10 ref grp_id grp_id 5 test.t1.b 100
|
|
2 LATERAL DERIVED t11 hash_ALL NULL #hash#$hj 5 test.t10.col1 100 Using where; Using join buffer (flat, BNLH join)
|
|
select *
|
|
from
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join
|
|
t3
|
|
on t3.a=t1.b
|
|
)
|
|
left join
|
|
(
|
|
select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id
|
|
)dt
|
|
on dt.grp_id=t1.b;
|
|
a b a b a b grp_id count(*)
|
|
1 1 1 1 1 1 1 100
|
|
1 1 1 1 1 2 1 100
|
|
1 1 1 1 1 3 1 100
|
|
1 1 1 2 1 1 1 100
|
|
1 1 1 2 1 2 1 100
|
|
1 1 1 2 1 3 1 100
|
|
2 2 2 1 2 1 2 100
|
|
2 2 2 1 2 2 2 100
|
|
2 2 2 1 2 3 2 100
|
|
2 2 2 2 2 1 2 100
|
|
2 2 2 2 2 2 2 100
|
|
2 2 2 2 2 3 2 100
|
|
3 3 3 1 3 1 3 100
|
|
3 3 3 1 3 2 3 100
|
|
3 3 3 1 3 3 3 100
|
|
3 3 3 2 3 1 3 100
|
|
3 3 3 2 3 2 3 100
|
|
3 3 3 2 3 3 3 100
|
|
4 4 4 1 4 1 4 100
|
|
4 4 4 1 4 2 4 100
|
|
4 4 4 1 4 3 4 100
|
|
4 4 4 2 4 1 4 100
|
|
4 4 4 2 4 2 4 100
|
|
4 4 4 2 4 3 4 100
|
|
5 5 5 1 5 1 5 100
|
|
5 5 5 1 5 2 5 100
|
|
5 5 5 1 5 3 5 100
|
|
5 5 5 2 5 1 5 100
|
|
5 5 5 2 5 2 5 100
|
|
5 5 5 2 5 3 5 100
|
|
set optimizer_switch=@tmp;
|
|
set join_cache_level=default;
|
|
delete from t11;
|
|
insert into t11 select A.seq, A.seq from seq_1_to_10 A;
|
|
analyze table t11 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t11 analyze status Engine-independent statistics collected
|
|
test.t11 analyze status OK
|
|
drop index a on t2;
|
|
drop index a on t3;
|
|
explain select *
|
|
from
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join
|
|
t3
|
|
on t3.a=t1.b
|
|
)
|
|
left join
|
|
(
|
|
select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id
|
|
)dt
|
|
on dt.grp_id=t1.b;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 50 Using where; Using join buffer (flat, BNL join)
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 15 Using where; Using join buffer (incremental, BNL join)
|
|
1 PRIMARY <derived2> ref key0 key0 5 test.t1.b 10 Using where
|
|
2 DERIVED t10 ALL grp_id NULL NULL NULL 10000 Using temporary; Using filesort
|
|
2 DERIVED t11 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
|
select *
|
|
from
|
|
(
|
|
(t1 left join t2 on t2.a=t1.b)
|
|
left join
|
|
t3
|
|
on t3.a=t1.b
|
|
)
|
|
left join
|
|
(
|
|
select grp_id, count(*)
|
|
from t10 left join t11 on t11.col1=t10.col1
|
|
group by grp_id
|
|
)dt
|
|
on dt.grp_id=t1.b;
|
|
a b a b a b grp_id count(*)
|
|
1 1 1 1 1 1 1 100
|
|
1 1 1 2 1 1 1 100
|
|
1 1 1 1 1 2 1 100
|
|
1 1 1 2 1 2 1 100
|
|
1 1 1 1 1 3 1 100
|
|
1 1 1 2 1 3 1 100
|
|
2 2 2 1 2 1 2 100
|
|
2 2 2 2 2 1 2 100
|
|
2 2 2 1 2 2 2 100
|
|
2 2 2 2 2 2 2 100
|
|
2 2 2 1 2 3 2 100
|
|
2 2 2 2 2 3 2 100
|
|
3 3 3 1 3 1 3 100
|
|
3 3 3 2 3 1 3 100
|
|
3 3 3 1 3 2 3 100
|
|
3 3 3 2 3 2 3 100
|
|
3 3 3 1 3 3 3 100
|
|
3 3 3 2 3 3 3 100
|
|
4 4 4 1 4 1 4 100
|
|
4 4 4 2 4 1 4 100
|
|
4 4 4 1 4 2 4 100
|
|
4 4 4 2 4 2 4 100
|
|
4 4 4 1 4 3 4 100
|
|
4 4 4 2 4 3 4 100
|
|
5 5 5 1 5 1 5 100
|
|
5 5 5 2 5 1 5 100
|
|
5 5 5 1 5 2 5 100
|
|
5 5 5 2 5 2 5 100
|
|
5 5 5 1 5 3 5 100
|
|
5 5 5 2 5 3 5 100
|
|
drop table t1,t2,t3;
|
|
drop table t10, t11;
|
|
#
|
|
# MDEV-31194: Server crash or assertion failure with join_cache_level=4
|
|
# (a followup to the above bug, MDEV-26301)
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (3),(4);
|
|
CREATE TABLE t2 (id INT PRIMARY KEY) ENGINE=Aria;
|
|
INSERT INTO t2 VALUES (1),(2);
|
|
set @tmp1= @@optimizer_switch, @tmp2= @@join_cache_level;
|
|
set
|
|
optimizer_switch= 'derived_with_keys=off',
|
|
join_cache_level= 4;
|
|
SELECT t1.* FROM t1 JOIN (SELECT id, COUNT(*) FROM t2 GROUP BY id) sq ON sq.id= t1.a;
|
|
a
|
|
set optimizer_switch= @tmp1, join_cache_level= @tmp2;
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# MDEV-31403: Server crashes in st_join_table::choose_best_splitting (still)
|
|
#
|
|
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES
|
|
(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12),(13),(14),(15);
|
|
CREATE TABLE t2 (b INT) ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES (100),(200);
|
|
CREATE TABLE t3 (c INT, d INT, KEY(c)) ENGINE=InnoDB;
|
|
INSERT INTO t3 VALUES (1,1),(2,2);
|
|
CREATE VIEW v AS SELECT c, d FROM t3 GROUP BY c, d;
|
|
SELECT * FROM t1 JOIN t2 WHERE (t1.a, t2.b) IN (SELECT * FROM v);
|
|
a b
|
|
DROP VIEW v;
|
|
DROP TABLE t1, t2, t3;
|
|
#
|
|
# MDEV-31279 Crash when lateral derived is guaranteed to return no rows
|
|
#
|
|
CREATE TABLE t1 (a CHAR(1)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('1'),('2');
|
|
CREATE TABLE t2 (b INT, KEY(b)) ENGINE=MyISAM;
|
|
ALTER TABLE t2 DISABLE KEYS;
|
|
INSERT INTO t2 VALUES (1),(2),(3);
|
|
ALTER TABLE t2 ENABLE KEYS;
|
|
CREATE TABLE t3 (c INT) ENGINE=MyISAM;
|
|
INSERT INTO t3 (c) SELECT seq FROM seq_1_to_101;
|
|
SELECT * FROM t1 WHERE t1.a IN (SELECT b FROM
|
|
(SELECT t2.b FROM t2 WHERE NOT EXISTS (SELECT 1 FROM t3) GROUP BY b) sq);
|
|
a
|
|
DROP TABLE t1, t2, t3;
|
|
#
|
|
# MDEV-23878: Wrong result with semi-join and splittable derived table
|
|
#
|
|
CREATE TABLE t1 (
|
|
groupId int,
|
|
id int unsigned,
|
|
PRIMARY KEY (groupId, id)
|
|
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
|
|
INSERT INTO t1 VALUES
|
|
(8,1),(8,2),(8,3),(8,4),(8,5),(8,6),(8,7),(8,8),(8,9),(8,10),
|
|
(8,11),(8,12),(8,13),(8,14),(8,15),(8,16),(8,17),(8,18),(8,19);
|
|
set statement in_predicate_conversion_threshold=2 for SELECT COUNT(*) AS cnt FROM t1
|
|
JOIN
|
|
(
|
|
SELECT groupId, id
|
|
FROM t1
|
|
WHERE id IN (1,2,3,4,5,6)
|
|
GROUP BY groupId, id
|
|
) AS t2
|
|
USING (groupId, id)
|
|
WHERE id IN (1,2,3,4,5,6,7,8);
|
|
cnt
|
|
6
|
|
set statement in_predicate_conversion_threshold=2 for EXPLAIN SELECT COUNT(*) AS cnt FROM t1
|
|
JOIN
|
|
(
|
|
SELECT groupId, id
|
|
FROM t1
|
|
WHERE id IN (1,2,3,4,5,6)
|
|
GROUP BY groupId, id
|
|
) AS t2
|
|
USING (groupId, id)
|
|
WHERE id IN (1,2,3,4,5,6,7,8);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 19
|
|
1 PRIMARY <derived3> ref key0 key0 8 test.t1.groupId,test.t1.id 1
|
|
1 PRIMARY <derived5> eq_ref distinct_key distinct_key 4 test.t1.id 1 Using where
|
|
5 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
3 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 8 test.t1.groupId,test.t1.id 1
|
|
3 LATERAL DERIVED <derived7> eq_ref distinct_key distinct_key 4 test.t1.id 1 Using where
|
|
7 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
set statement optimizer_switch='split_materialized=off, loosescan=off' for
|
|
set statement in_predicate_conversion_threshold=2 for
|
|
SELECT COUNT(*) AS cnt FROM t1
|
|
JOIN
|
|
(
|
|
SELECT groupId, id
|
|
FROM t1
|
|
WHERE id IN (1,2,3,4,5,6)
|
|
GROUP BY groupId, id
|
|
) AS t2
|
|
USING (groupId, id)
|
|
WHERE id IN (1,2,3,4,5,6,7,8);
|
|
cnt
|
|
6
|
|
DROP TABLE t1;
|
|
# End of 10.4 tests
|
|
SET GLOBAL innodb_stats_persistent=@save_innodb_stats_persistent;
|