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2fa5df5f4e
Analysis: Single-row subqueries are not considered expensive and are evaluated both during EXPLAIN in to detect errors like "Subquery returns more than 1 row", and during optimization to perform constant optimization. The cause for the failed ASSERT is in JOIN::join_free, where we set bool full= (!select_lex->uncacheable && !thd->lex->describe); Thus for EXPLAIN statements full == FALSE, and as a result the call to JOIN::cleanup doesn't call JOIN_TAB::cleanup which should have called table->disable_keyread(). Solution: Consider all kinds of subquery predicates as expensive.
493 lines
14 KiB
Text
493 lines
14 KiB
Text
# General purpose bug fix tests go here : subselect.test too large
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--echo #
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--echo # Bug #46791: Assertion failed:(table->key_read==0),function unknown
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--echo # function,file sql_base.cc
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--echo #
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CREATE TABLE t1 (a INT, b INT, KEY(a));
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INSERT INTO t1 VALUES (1,1),(2,2);
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CREATE TABLE t2 LIKE t1;
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INSERT INTO t2 VALUES (1,1),(2,2);
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CREATE TABLE t3 LIKE t1;
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--echo # should have 1 impossible where and 2 dependent subqueries
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EXPLAIN
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SELECT 1 FROM t1
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WHERE NOT EXISTS (SELECT 1 FROM t2 WHERE 1 = (SELECT MIN(t2.b) FROM t3))
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ORDER BY count(*);
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--echo # should not crash the next statement
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SELECT 1 FROM t1
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WHERE NOT EXISTS (SELECT 1 FROM t2 WHERE 1 = (SELECT MIN(t2.b) FROM t3))
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ORDER BY count(*);
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--echo # should not crash: the crash is caused by the previous statement
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SELECT 1;
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DROP TABLE t1,t2,t3;
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--echo #
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--echo # Bug #47106: Crash / segfault on adding EXPLAIN to a non-crashing
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--echo # query
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--echo #
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CREATE TABLE t1 (
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a INT,
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b INT,
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PRIMARY KEY (a),
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KEY b (b)
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);
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INSERT INTO t1 VALUES (1, 1), (2, 1);
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CREATE TABLE t2 LIKE t1;
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INSERT INTO t2 SELECT * FROM t1;
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CREATE TABLE t3 LIKE t1;
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INSERT INTO t3 SELECT * FROM t1;
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--echo # Should not crash.
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--echo # Should have 1 impossible where and 2 dependent subqs.
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EXPLAIN
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SELECT
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(SELECT 1 FROM t1,t2 WHERE t2.b > t3.b)
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FROM t3 WHERE 1 = 0 GROUP BY 1;
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--echo # should return 0 rows
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SELECT
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(SELECT 1 FROM t1,t2 WHERE t2.b > t3.b)
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FROM t3 WHERE 1 = 0 GROUP BY 1;
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DROP TABLE t1,t2,t3;
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--echo End of 5.0 tests.
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#
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# Fix for LP#612894
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# Some aggregate functions (such as MIN MAX) work incorrectly in subqueries
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# after getting NULL value
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#
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CREATE TABLE t1 (col_int_nokey int(11) NOT NULL, col_varchar_nokey varchar(1) NOT NULL) engine=myisam;
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INSERT INTO t1 VALUES (2,'s'),(0,'v'),(2,'s');
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CREATE TABLE t2 (
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pk int(11) NOT NULL AUTO_INCREMENT,
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`col_int_key` int(11) NOT NULL,
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col_varchar_key varchar(1) NOT NULL,
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PRIMARY KEY (pk),
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KEY `col_int_key` (`col_int_key`),
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KEY `col_varchar_key` (`col_varchar_key`)
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) ENGINE=MyISAM;
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INSERT INTO t2 VALUES (4,10,'g'), (5,20,'v');
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SELECT t1.col_int_nokey,(SELECT MIN( t2_a.col_int_key ) FROM t2 t2_a, t2 t2_b, t1 t1_a WHERE t1_a.col_varchar_nokey = t2_b.col_varchar_key and t1.col_int_nokey ) as sub FROM t1;
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SELECT t1.col_int_nokey,(SELECT MIN( t2_a.col_int_key ) +1 FROM t2 t2_a, t2 t2_b, t1 t1_a WHERE t1_a.col_varchar_nokey = t2_b.col_varchar_key and t1.col_int_nokey ) as sub FROM t1;
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DROP TABLE t1,t2;
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--echo #
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--echo # Bug#54568: create view cause Assertion failed: 0,
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--echo # file .\item_subselect.cc, line 836
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--echo #
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EXPLAIN SELECT 1 LIKE ( 1 IN ( SELECT 1 ) );
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DESCRIBE SELECT 1 LIKE ( 1 IN ( SELECT 1 ) );
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--echo # None of the below should crash
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CREATE VIEW v1 AS SELECT 1 LIKE ( 1 IN ( SELECT 1 ) );
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CREATE VIEW v2 AS SELECT 1 LIKE '%' ESCAPE ( 1 IN ( SELECT 1 ) );
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DROP VIEW v1, v2;
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--echo #
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--echo # End of 5.1 tests.
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--echo #
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--echo #
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--echo # BUG#46743 "Azalea processing correlated, aggregate SELECT
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--echo # subqueries incorrectly"
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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 , KEY (d)); # index is needed for bug
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INSERT INTO t2 VALUES (NULL),(NULL); # two rows needed for bug
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# we see that subquery returns 0 rows
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--echo 0 rows in subquery
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SELECT 1 AS RESULT FROM t2,t1 WHERE d = c;
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# so here it ends up as NULL
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--echo base query
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SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 ;
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EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 ;
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--echo first equivalent variant
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SELECT (SELECT 1 FROM t2 WHERE d = IFNULL(c,NULL)) AS RESULT FROM t1 GROUP BY c ;
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EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = IFNULL(c,NULL)) AS RESULT FROM t1 GROUP BY c;
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--echo second equivalent variant
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# used to fail with 1242: Subquery returns more than 1 row
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SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 GROUP BY c ;
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EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) AS RESULT FROM t1 GROUP BY c ;
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DROP TABLE t1,t2;
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--echo #
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--echo # BUG#45928 "Differing query results depending on MRR and
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--echo # engine_condition_pushdown settings"
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--echo #
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CREATE TABLE `t1` (
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`pk` int(11) NOT NULL AUTO_INCREMENT,
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`time_nokey` time NOT NULL,
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`varchar_key` varchar(1) NOT NULL,
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`varchar_nokey` varchar(1) NOT NULL,
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PRIMARY KEY (`pk`),
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KEY `varchar_key` (`varchar_key`)
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) AUTO_INCREMENT=12 DEFAULT CHARSET=latin1;
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INSERT INTO `t1` VALUES (10,'00:00:00','i','i'),(11,'00:00:00','','');
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set @old_optimizer_switch = @@session.optimizer_switch,
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@old_optimizer_use_mrr = @@session.optimizer_use_mrr,
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@old_engine_condition_pushdown = @@session.engine_condition_pushdown;
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SET SESSION OPTIMIZER_SWITCH = 'materialization=off,semijoin=off,loosescan=off,firstmatch=off';
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SET SESSION optimizer_use_mrr = 'force';
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SET SESSION engine_condition_pushdown = 1;
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SELECT `time_nokey` G1 FROM t1 WHERE ( `varchar_nokey` , `varchar_key` ) IN (
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SELECT `varchar_nokey` , `varchar_nokey` ) AND `varchar_key` >= 'c' HAVING G1 ORDER
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BY `pk` ;
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set @@session.optimizer_switch = @old_optimizer_switch,
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@@session.optimizer_use_mrr = @old_optimizer_use_mrr,
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@@session.engine_condition_pushdown = @old_engine_condition_pushdown;
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DROP TABLE t1;
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--echo #
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--echo # BUG#45863 "Assertion failed: (fixed == 0), function fix_fields(),
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--echo # file item.cc, line 4448"
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--echo #
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--disable_warnings
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DROP TABLE IF EXISTS C, BB;
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--enable_warnings
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CREATE TABLE C (
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varchar_nokey varchar(1) NOT NULL
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);
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INSERT INTO C VALUES
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('k'),('a'),(''),('u'),('e'),('v'),('i'),
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('t'),('u'),('f'),('u'),('m'),('j'),('f'),
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('v'),('j'),('g'),('e'),('h'),('z');
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CREATE TABLE BB (
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varchar_nokey varchar(1) NOT NULL
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);
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INSERT INTO BB VALUES ('i'),('t');
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-- error ER_OPERAND_COLUMNS
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SELECT varchar_nokey FROM C
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WHERE (varchar_nokey, OUTR) IN (SELECT varchar_nokey
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FROM BB);
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-- error ER_BAD_FIELD_ERROR
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SELECT varchar_nokey FROM C
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WHERE (varchar_nokey, OUTR) IN (SELECT varchar_nokey, varchar_nokey
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FROM BB);
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DROP TABLE C,BB;
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--echo #
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--echo # During work with BUG#45863 I had problems with a query that was
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--echo # optimized differently in regular and prepared mode.
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--echo # Because there was a bug in one of the selected strategies, I became
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--echo # aware of the problem. Adding an EXPLAIN query to catch this.
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--disable_warnings
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DROP TABLE IF EXISTS t1, t2, t3;
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--enable_warnings
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CREATE TABLE t1
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(EMPNUM CHAR(3) NOT NULL,
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EMPNAME CHAR(20),
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GRADE DECIMAL(4),
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CITY CHAR(15));
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CREATE TABLE t2
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(PNUM CHAR(3) NOT NULL,
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PNAME CHAR(20),
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PTYPE CHAR(6),
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BUDGET DECIMAL(9),
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CITY CHAR(15));
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CREATE TABLE t3
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(EMPNUM CHAR(3) NOT NULL,
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PNUM CHAR(3) NOT NULL,
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HOURS DECIMAL(5));
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INSERT INTO t1 VALUES ('E1','Alice',12,'Deale');
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INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna');
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INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna');
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INSERT INTO t1 VALUES ('E4','Don',12,'Deale');
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INSERT INTO t1 VALUES ('E5','Ed',13,'Akron');
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INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale');
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INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna');
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INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa');
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INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale');
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INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna');
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INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale');
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INSERT INTO t3 VALUES ('E1','P1',40);
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INSERT INTO t3 VALUES ('E1','P2',20);
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INSERT INTO t3 VALUES ('E1','P3',80);
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INSERT INTO t3 VALUES ('E1','P4',20);
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INSERT INTO t3 VALUES ('E1','P5',12);
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INSERT INTO t3 VALUES ('E1','P6',12);
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INSERT INTO t3 VALUES ('E2','P1',40);
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INSERT INTO t3 VALUES ('E2','P2',80);
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INSERT INTO t3 VALUES ('E3','P2',20);
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INSERT INTO t3 VALUES ('E4','P2',20);
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INSERT INTO t3 VALUES ('E4','P4',40);
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INSERT INTO t3 VALUES ('E4','P5',80);
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SET @old_optimizer_switch = @@session.optimizer_switch;
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SET @old_join_cache_level = @@session.join_cache_level;
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SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,semijoin=on';
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SET SESSION join_cache_level = 1;
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CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM);
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EXPLAIN SELECT EMPNAME
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FROM t1
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WHERE EMPNUM IN
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(SELECT EMPNUM
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FROM t3
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WHERE PNUM IN
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(SELECT PNUM
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FROM t2
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WHERE PTYPE = 'Design'));
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PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
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FROM t1
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WHERE EMPNUM IN
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(SELECT EMPNUM
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FROM t3
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WHERE PNUM IN
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(SELECT PNUM
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FROM t2
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WHERE PTYPE = 'Design'))";
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EXECUTE stmt;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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DROP INDEX t1_IDX ON t1;
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CREATE INDEX t1_IDX ON t1(EMPNUM);
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EXPLAIN SELECT EMPNAME
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FROM t1
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WHERE EMPNUM IN
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(SELECT EMPNUM
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FROM t3
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WHERE PNUM IN
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(SELECT PNUM
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FROM t2
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WHERE PTYPE = 'Design'));
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PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
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FROM t1
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WHERE EMPNUM IN
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(SELECT EMPNUM
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FROM t3
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WHERE PNUM IN
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(SELECT PNUM
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FROM t2
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WHERE PTYPE = 'Design'))";
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EXECUTE stmt;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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DROP INDEX t1_IDX ON t1;
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EXPLAIN SELECT EMPNAME
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FROM t1
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WHERE EMPNUM IN
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(SELECT EMPNUM
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FROM t3
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WHERE PNUM IN
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(SELECT PNUM
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FROM t2
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WHERE PTYPE = 'Design'));
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PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
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FROM t1
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WHERE EMPNUM IN
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(SELECT EMPNUM
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FROM t3
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WHERE PNUM IN
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(SELECT PNUM
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FROM t2
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WHERE PTYPE = 'Design'))";
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EXECUTE stmt;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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SET SESSION optimizer_switch = @old_optimizer_switch;
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SET SESSION join_cache_level = @old_join_cache_level;
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DROP TABLE t1, t2, t3;
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--echo #
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--echo # BUG#45221 Query SELECT pk FROM C WHERE pk IN (SELECT int_key) failing
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--echo #
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CREATE TABLE t1 (
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i1_key INT,
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i2 INT,
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i3 INT,
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KEY i1_index (i1_key)
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);
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INSERT INTO t1 VALUES (9,1,2), (9,2,1);
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CREATE TABLE t2 (
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pk INT NOT NULL,
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i1 INT,
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PRIMARY KEY (pk)
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);
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INSERT INTO t2 VALUES (9,1);
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--echo # Enable Index condition pushdown
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--replace_column 1 #
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SELECT @old_icp:=@@engine_condition_pushdown;
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SET SESSION engine_condition_pushdown = 'ON';
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--echo
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SELECT pk
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FROM t2
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WHERE
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pk IN (
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SELECT i1_key
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FROM t1
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WHERE t1.i2 < t1.i3 XOR t2.i1 > 1
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ORDER BY t1.i2 desc);
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--echo # Restore old value for Index condition pushdown
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SET SESSION engine_condition_pushdown=@old_icp;
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DROP TABLE t1,t2;
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--echo #
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--echo # LP BUG#641203 Query returns rows where no result is expected (impossible WHERE)
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--echo #
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CREATE TABLE t1 (c1 varchar(1) DEFAULT NULL);
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CREATE TABLE t2 (c1 varchar(1) DEFAULT NULL);
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INSERT INTO t2 VALUES ('k'), ('d');
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CREATE TABLE t3 (c1 varchar(1) DEFAULT NULL);
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INSERT INTO t3 VALUES ('a'), ('b'), ('c');
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CREATE TABLE t4 (c1 varchar(1) primary key);
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INSERT INTO t4 VALUES ('k'), ('d');
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EXPLAIN
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SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
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SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
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EXPLAIN
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SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
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SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2);
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EXPLAIN
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SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2);
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SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2);
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EXPLAIN
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SELECT * FROM t4 LEFT JOIN t2 ON t4.c1 WHERE 's' IN (SELECT c1 FROM t2);
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SELECT * FROM t4 LEFT JOIN t2 ON t4.c1 WHERE 's' IN (SELECT c1 FROM t2);
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drop table t1, t2, t3, t4;
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--echo #
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--echo # LP BUG#675981 Assertion `cache != __null' failed in sub_select_cache()
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--echo # on EXPLAIN
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--echo #
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CREATE TABLE t1 (f1 int,f2 int) ;
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INSERT IGNORE INTO t1 VALUES ('2','5'),('2',NULL);
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CREATE TABLE t2 (f1 int, f5 int) ;
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INSERT IGNORE INTO t2 VALUES (1,0);
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CREATE TABLE t3 (f4 int) ;
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INSERT IGNORE INTO t3 VALUES (0),(0);
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set @@optimizer_switch='in_to_exists=on,materialization=off,semijoin=off';
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EXPLAIN
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SELECT * FROM t2
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WHERE f1 IN (SELECT t1.f2 FROM t1 JOIN t3 ON t3.f4);
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drop table t1, t2, t3;
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--echo #
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--echo # LP BUG#680005 Second assertion `cache != __null' failed in
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--echo # sub_select_cache() on EXPLAIN
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--echo #
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CREATE TABLE t1 (f1 int,f2 int,f4 int,f6 int,KEY (f4)) ;
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INSERT IGNORE INTO t1 VALUES
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('1','5','1','0'),('2','1','1','0'),('2','2','2','0'),('0',NULL,'0','0'),
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('2','1','2','0'),('2','0','0','0'),('2','2','2','0'),('2','8','2','0'),
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('2','7','2','0'),('2','5','2','0'),('2',NULL,'1','0');
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CREATE TABLE t2 (f3 int) ;
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INSERT IGNORE INTO t2 VALUES ('7');
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CREATE TABLE t3 (f3 int) ;
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INSERT IGNORE INTO t3 VALUES ('2');
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EXPLAIN
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SELECT t1.f4
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FROM t2 JOIN t1 ON t1.f6
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WHERE
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( t1.f2 ) IN (SELECT SUBQUERY2_t1.f3
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FROM t3 AS SUBQUERY2_t1
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JOIN
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(t1 AS SUBQUERY2_t2
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JOIN
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t1 AS SUBQUERY2_t3 ON SUBQUERY2_t3.f1)
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ON SUBQUERY2_t3.f2)
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GROUP BY t1.f4 ORDER BY t1.f1 LIMIT 10;
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drop table t1, t2, t3;
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--echo #
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--echo # LP BUG#680038 bool close_thread_table(THD*, TABLE**):
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--echo # Assertion `table->key_read == 0' failed in EXPLAIN
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--echo #
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CREATE TABLE t1 (f1 int,f3 int,f4 int) ;
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INSERT IGNORE INTO t1 VALUES (NULL,1,0);
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CREATE TABLE t2 (f2 int,f4 int,f5 int) ;
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INSERT IGNORE INTO t2 VALUES (8,0,0),(5,0,0);
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CREATE TABLE t3 (f4 int,KEY (f4)) ;
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INSERT IGNORE INTO t3 VALUES (0),(0);
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set @@optimizer_switch='semijoin=off';
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|
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EXPLAIN
|
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SELECT * FROM t1 WHERE
|
|
(SELECT f2 FROM t2
|
|
WHERE f4 <= ALL
|
|
(SELECT SQ1_t1.f4
|
|
FROM t3 AS SQ1_t1 JOIN t3 AS SQ1_t3 ON SQ1_t3.f4
|
|
GROUP BY SQ1_t1.f4));
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|
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drop table t1, t2, t3;
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|
|
--echo #
|
|
--echo # BUG#52317: Assertion failing in Field_varstring::store()
|
|
--echo # at field.cc:6833
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (i INTEGER);
|
|
INSERT INTO t1 VALUES (1);
|
|
CREATE TABLE t2 (i INTEGER, KEY k(i));
|
|
INSERT INTO t2 VALUES (1), (2);
|
|
|
|
EXPLAIN
|
|
SELECT i FROM t1 WHERE (1) NOT IN (SELECT i FROM t2);
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|
|
|
DROP TABLE t2;
|
|
DROP TABLE t1;
|