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b8f00542e2
- In join buffering code, call join_tab_execution_startup() (#1) before we call join_tab_scan->open() (#2). This is important with SJ-Materialization because #1 fills the materialized table, while #2 will actually try to read the first row. Attempt to read the first row before we have populated the materialized table would cause zero rows to be returned when actually there were matches.
149 lines
4.0 KiB
Plaintext
149 lines
4.0 KiB
Plaintext
#
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# Hash semi-join regression tests
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# (WL#1110: Subquery optimization: materialization)
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#
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# force the use of materialization
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set @@optimizer_switch='semijoin=off';
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--source t/subselect_sj_mat.test
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set @@optimizer_switch=default;
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#
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# Test that the contents of the temp table of a materialized subquery is
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# cleaned up between PS re-executions.
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#
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create table t0 (a int);
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insert into t0 values (0),(1),(2);
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create table t1 (a int);
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insert into t1 values (0),(1),(2);
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explain select a, a in (select a from t1) from t0;
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select a, a in (select a from t1) from t0;
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prepare s from 'select a, a in (select a from t1) from t0';
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execute s;
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update t1 set a=123;
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execute s;
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drop table t0, t1;
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--echo #
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--echo # LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and
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--echo # partial_match_table_scan=on
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--echo #
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create table t1 (c1 int);
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create table t2 (c2 int);
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insert into t1 values (1);
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insert into t2 values (2);
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set @@optimizer_switch='semijoin=off';
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EXPLAIN
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SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2);
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SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2);
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EXPLAIN
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SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2) HAVING c1_sum;
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SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2) HAVING c1_sum;
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drop table t1, t2;
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--echo #
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--echo # BUG#52344 - Subquery materialization:
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--echo # Assertion if subquery in on-clause of outer join
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--echo #
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set @@optimizer_switch='semijoin=off';
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CREATE TABLE t1 (i INTEGER);
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INSERT INTO t1 VALUES (10);
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CREATE TABLE t2 (j INTEGER);
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INSERT INTO t2 VALUES (5);
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CREATE TABLE t3 (k INTEGER);
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EXPLAIN
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SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
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SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
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EXPLAIN
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SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
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SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
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DROP TABLE t1, t2, t3;
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--echo #
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--echo # LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and
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--echo # partial_match_table_scan=on
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--echo #
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CREATE TABLE t1 (c1 int);
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INSERT INTO t1 VALUES (1),(2);
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CREATE TABLE t2 (c2 int);
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INSERT INTO t2 VALUES (10);
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PREPARE st1 FROM "
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SELECT *
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FROM t2 LEFT JOIN (SELECT * FROM t2) t3 ON (8, 4) IN (SELECT c1, c1 FROM t1)";
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EXECUTE st1;
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EXECUTE st1;
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DROP TABLE t1, t2;
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--echo #
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--echo # Testcase backport: BUG#46548 IN-subqueries return 0 rows with materialization=on
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--echo #
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CREATE TABLE t1 (
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pk int,
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a varchar(1),
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b varchar(4),
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c varchar(4),
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d varchar(4),
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PRIMARY KEY (pk)
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);
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INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');
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CREATE TABLE t2 LIKE t1;
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INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');
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SET @@optimizer_switch='default,semijoin=on,materialization=on';
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EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
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SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
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SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
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DROP TABLE t1, t2;
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-- echo #
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-- echo # BUG#724228: Wrong result with materialization=on and three aggregates in maria-5.3-mwl90
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-- echo #
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CREATE TABLE t1 ( f2 int(11)) ;
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INSERT IGNORE INTO t1 VALUES ('7'),('9'),('7'),('4'),('2'),('6'),('8'),('5'),('6'),('188'),('2'),('1'),('1'),('0'),('9'),('4');
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CREATE TABLE t2 ( f1 int(11), f2 int(11)) ENGINE=MyISAM;
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INSERT IGNORE INTO t2 VALUES ('1','1');
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CREATE TABLE t3 ( f1 int(11), f2 int(11), f3 int(11), PRIMARY KEY (f1)) ;
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INSERT IGNORE INTO t3 VALUES ('16','6','1'),('18','3','4'),('19',NULL,'9'),('20','0','6'),('41','2','0'),('42','2','5'),('43','9','6'),('44','7','4'),('45','1','4'),('46','222','238'),('47','3','6'),('48','6','6'),('49',NULL,'1'),('50','5','1');
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SET @_save_join_cache_level = @@join_cache_level;
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SET @_save_optimizer_switch = @@optimizer_switch;
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SET join_cache_level = 1;
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SET optimizer_switch='materialization=on';
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SELECT f1 FROM t3
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WHERE
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f1 NOT IN (SELECT MAX(f2) FROM t1) AND
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f3 IN (SELECT MIN(f1) FROM t2) AND
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f1 IN (SELECT COUNT(f2) FROM t1);
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SET @@join_cache_level = @_save_join_cache_level;
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SET @@optimizer_switch = @_save_optimizer_switch;
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drop table t1, t2, t3;
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