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a8bd6a9813
When QUICK_GROUP_MIN_MAX_SELECT is initialized or being reset it stores the prefix of the last group of the index chosen for retrieving data (last_value). Later, when looping through records at get_next() method, the server checks whether the retrieved group is the last, and if so, it finishes processing. At the same time, it looks like there is no need for that additional check since method next_prefix() returns HA_ERR_KEY_NOT_FOUND or HA_ERR_END_OF_FILE when there are no more satisfying records. If we do not perform the check, we do not need to retrieve and store last_value either. This commit removes using of last_value from QUICK_GROUP_MIN_MAX_SELECT. Reviewer: Sergei Petrunia <sergey@mariadb.com>
325 lines
11 KiB
Text
325 lines
11 KiB
Text
#
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# Test file for WL#1724 (Min/Max Optimization for Queries with Group By Clause).
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# The queries in this file test query execution via QUICK_GROUP_MIN_MAX_SELECT
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# that depends on InnoDB
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#
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--source include/have_innodb.inc
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set @innodb_stats_persistent_save= @@innodb_stats_persistent;
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set @innodb_stats_persistent_sample_pages_save=
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@@innodb_stats_persistent_sample_pages;
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set global innodb_stats_persistent= 1;
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set global innodb_stats_persistent_sample_pages=100;
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--disable_warnings
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drop view if exists v1;
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drop table if exists t1,t4;
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--enable_warnings
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#
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# Bug #12672: primary key implcitly included in every innodb index
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#
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--disable_warnings
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create table t4 (
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pk_col int auto_increment primary key, a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '
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) engine=innodb;
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--enable_warnings
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insert into t4 (a1, a2, b, c, d) values
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('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
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('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
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('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
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('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
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('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
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('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
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('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
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('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
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('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
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('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
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('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
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('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
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('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
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('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
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('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
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('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
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('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
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('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
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('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
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('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
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('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
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('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
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('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
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('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
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('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
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('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
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('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
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('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
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('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
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('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
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('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
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('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
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create index idx12672_0 on t4 (a1);
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create index idx12672_1 on t4 (a1,a2,b,c);
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create index idx12672_2 on t4 (a1,a2,b);
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analyze table t4;
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select distinct a1 from t4 where pk_col not in (1,2,3,4);
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drop table t4;
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#
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# Bug #6142: a problem with the empty innodb table
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#
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--disable_warnings
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create table t1 (
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a varchar(30), b varchar(30), primary key(a), key(b)
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) engine=innodb;
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--enable_warnings
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select distinct a from t1;
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drop table t1;
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#
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# Bug #9798: group by with rollup
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#
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--disable_warnings
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create table t1(a int, key(a)) engine=innodb;
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--enable_warnings
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insert into t1 values(1);
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select a, count(a) from t1 group by a with rollup;
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drop table t1;
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#
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# Bug #13293 Wrongly used index results in endless loop.
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#
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create table t1 (f1 int, f2 char(1), primary key(f1,f2)) engine=innodb;
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insert into t1 values ( 1,"e"),(2,"a"),( 3,"c"),(4,"d");
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alter table t1 drop primary key, add primary key (f2, f1);
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explain select distinct f1 a, f1 b from t1;
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explain select distinct f1, f2 from t1;
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drop table t1;
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#
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# Bug #36632: Select distinct from a simple view on an InnoDB table
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# returns incorrect results
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#
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create table t1(pk int primary key) engine=innodb;
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create view v1 as select pk from t1 where pk < 20;
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insert into t1 values (1), (2), (3), (4);
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select distinct pk from v1;
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insert into t1 values (5), (6), (7);
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select distinct pk from v1;
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drop view v1;
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drop table t1;
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--echo End of 5.1 tests
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--echo #
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--echo # Bug#12540545 61101: ASSERTION FAILURE IN THREAD 1256741184 IN
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--echo # FILE /BUILDDIR/BUILD/BUILD/MYSQ
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--echo #
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CREATE TABLE t1 (a CHAR(1), b CHAR(1), PRIMARY KEY (a,b)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES ('a', 'b'), ('c', 'd');
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EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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DROP TABLE t1;
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CREATE TABLE t1 (a CHAR(1) NOT NULL, b CHAR(1) NOT NULL, UNIQUE KEY (a,b))
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ENGINE=InnoDB;
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INSERT INTO t1 VALUES ('a', 'b'), ('c', 'd');
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EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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DROP TABLE t1;
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--echo End of 5.5 tests
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--echo #
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--echo # Bug#17909656 - WRONG RESULTS FOR A SIMPLE QUERY WITH GROUP BY
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--echo #
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CREATE TABLE t0 (
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i1 INTEGER NOT NULL
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);
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INSERT INTO t0 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),
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(11),(12),(13),(14),(15),(16),(17),(18),(19),(20),
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(21),(22),(23),(24),(25),(26),(27),(28),(29),(30);
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CREATE TABLE t1 (
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c1 CHAR(1) NOT NULL,
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i1 INTEGER NOT NULL,
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i2 INTEGER NOT NULL,
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UNIQUE KEY k1 (c1,i2)
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) ENGINE=InnoDB;
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INSERT INTO t1 SELECT 'A',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'B',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'C',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'D',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'E',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'F',i1,i1 FROM t0;
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CREATE TABLE t2 (
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c1 CHAR(1) NOT NULL,
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i1 INTEGER NOT NULL,
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i2 INTEGER NOT NULL,
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UNIQUE KEY k2 (c1,i1,i2)
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) ENGINE=InnoDB;
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INSERT INTO t2 SELECT 'A',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'B',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'C',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'D',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'E',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'F',i1,i1 FROM t0;
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-- disable_result_log
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ANALYZE TABLE t1;
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ANALYZE TABLE t2;
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-- enable_result_log
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let query=
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SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' AND i2 = 17) OR ( c1 = 'F')
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GROUP BY c1;
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eval EXPLAIN $query;
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eval $query;
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let query=
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SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR ( c1 = 'F' AND i2 = 17))
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GROUP BY c1;
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eval EXPLAIN $query;
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eval $query;
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let query=
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SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR c1 = 'F' ) AND ( i2 = 17 )
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GROUP BY c1;
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eval EXPLAIN $query;
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eval $query;
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let query=
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SELECT c1, max(i2) FROM t1
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WHERE ((c1 = 'C' AND (i2 = 40 OR i2 = 30)) OR ( c1 = 'F' AND (i2 = 40 )))
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GROUP BY c1;
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eval EXPLAIN $query;
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eval $query;
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let query=
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SELECT c1, i1, max(i2) FROM t2
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WHERE (c1 = 'C' OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 )
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GROUP BY c1,i1;
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eval EXPLAIN $query;
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eval $query;
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let query=
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SELECT c1, i1, max(i2) FROM t2
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WHERE (((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 ))
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GROUP BY c1,i1;
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eval EXPLAIN $query;
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eval $query;
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let query=
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SELECT c1, i1, max(i2) FROM t2
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WHERE ((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35) OR ( i2 = 17 ))
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GROUP BY c1,i1;
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eval EXPLAIN $query;
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eval $query;
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DROP TABLE t0,t1,t2;
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--echo #
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--echo # MDEV-MariaDB daemon leaks memory with specific query
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--echo #
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CREATE TABLE t1 (`voter_id` int(11) unsigned NOT NULL,
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`language_id` int(11) unsigned NOT NULL DEFAULT '1'
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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CREATE TABLE t2 (`voter_id` int(10) unsigned NOT NULL DEFAULT '0',
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`serialized_c` mediumblob) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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insert into t2 values (1,repeat("a",1000)),(2,repeat("a",1000)),(3,repeat("b",1000)),(4,repeat("c",1000)),(4,repeat("b",1000));
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SELECT GROUP_CONCAT(t1.language_id SEPARATOR ',') AS `translation_resources`, `d`.`serialized_c` FROM t2 AS `d` LEFT JOIN t1 ON `d`.`voter_id` = t1.`voter_id` GROUP BY `d`.`voter_id` ORDER BY 10-d.voter_id+RAND()*0;
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drop table t1,t2;
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--echo #
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--echo # MDEV-30143: Segfault on select query using index for group-by and filesort
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--echo #
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CREATE TABLE t1 (a varchar(35), b varchar(4)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES
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('Albania','AXA'),('Australia','AUS'),('American Samoa','AMSA'),('Bahamas','BS');
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CREATE TABLE t2 (a varchar(4), b varchar(50), PRIMARY KEY (b,a), KEY (a)) ENGINE=InnoDB;
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INSERT INTO t2 VALUES
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('BERM','African Methodist Episcopal'),('AUS','Anglican'),('BERM','Anglican'),('BS','Anglican'),('BS','Baptist'),('BS','Methodist');
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let query=
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SELECT t1.a
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FROM (SELECT a FROM t2 GROUP BY a ORDER BY COUNT(DISTINCT b) LIMIT 1) dt
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JOIN t1 ON dt.a=t1.b;
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--replace_column 9 #
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eval EXPLAIN $query;
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eval $query;
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DROP TABLES t1, t2;
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--echo #
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--echo # MDEV-15656: Assertion `is_last_prefix <= 0' failed in
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--echo # QUICK_GROUP_MIN_MAX_SELECT::get_next
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--echo #
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SET @lru_depth.save= @@innodb_lru_scan_depth;
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SET GLOBAL innodb_lru_scan_depth= 1024;
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CREATE TABLE t1 (
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pk_part1 INT AUTO_INCREMENT,
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a VARCHAR(4),
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row_start timestamp(6) default current_timestamp,
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PRIMARY KEY (pk_part1, row_start)
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) ENGINE=InnoDB;
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INSERT INTO t1 (a) VALUES
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo'),
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('foo'),('bar'),('foo'),('bar'),('foo');
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--connect (con1,localhost,root,,test)
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SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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--let $run= 20
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--disable_result_log
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while ($run)
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{
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--send
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SELECT DISTINCT pk_part1 FROM t1;
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--connection default
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INSERT INTO t1 (pk_part1) VALUES (NULL);
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--connection con1
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--reap
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--dec $run
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}
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--enable_result_log
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--disconnect con1
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--connection default
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DROP TABLE t1;
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SET GLOBAL innodb_lru_scan_depth= @lru_depth.save;
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set global innodb_stats_persistent= @innodb_stats_persistent_save;
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set global innodb_stats_persistent_sample_pages=
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@innodb_stats_persistent_sample_pages_save;
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