mirror of
https://github.com/MariaDB/server.git
synced 2025-01-27 01:04:19 +01:00
cdc7253787
MyISAM and Aria used to lie to the server about the reflength value. One value was used internally, it was stored on disk, e.g. in indexes, and couldn't be changed without full table rebuild. A differently calculated value was reported to the server - that value was sometimes larger than the true reflength. That caused the server to allocate more memory per position than necessary - affecting filesort, join buffer usage, optimizer cost calculations, and may be more.
331 lines
9.4 KiB
Text
331 lines
9.4 KiB
Text
#
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# MRR/MyISAM tests.
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#
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--source include/have_sequence.inc
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--disable_warnings
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drop table if exists t0, t1, t2, t3;
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--enable_warnings
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set @myisam_mrr_tmp=@@optimizer_switch;
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set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
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set optimizer_switch='optimize_join_buffer_size=on';
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set @mrr_buffer_size_save= @@mrr_buffer_size;
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set mrr_buffer_size=79;
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-- source include/mrr_tests.inc
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-- source include/word_size.inc
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set @@mrr_buffer_size= @mrr_buffer_size_save;
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#
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# BUG#30622: Incorrect query results for MRR + filesort
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#
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CREATE TABLE t1 (
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ID int(10) unsigned NOT NULL AUTO_INCREMENT,
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col1 int(10) unsigned DEFAULT NULL,
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key1 int(10) unsigned NOT NULL DEFAULT '0',
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key2 int(10) unsigned DEFAULT NULL,
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text1 text,
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text2 text,
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col2 smallint(6) DEFAULT '100',
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col3 enum('headers','bodyandsubject') NOT NULL DEFAULT 'bodyandsubject',
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col4 tinyint(3) unsigned NOT NULL DEFAULT '0',
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PRIMARY KEY (ID),
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KEY (key1),
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KEY (key2)
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) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
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INSERT INTO t1 VALUES
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(1,NULL,1130,NULL,'Hello',NULL,100,'bodyandsubject',0),
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(2,NULL,1130,NULL,'bye',NULL,100,'bodyandsubject',0),
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(3,NULL,1130,NULL,'red',NULL,100,'bodyandsubject',0),
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(4,NULL,1130,NULL,'yellow',NULL,100,'bodyandsubject',0),
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(5,NULL,1130,NULL,'blue',NULL,100,'bodyandsubject',0);
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select * FROM t1 WHERE key1=1130 AND col1 IS NULL ORDER BY text1;
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drop table t1;
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--echo
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--echo BUG#37851: Crash in test_if_skip_sort_order tab->select is zero
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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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PRIMARY KEY (pk)
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);
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INSERT INTO t1 VALUES (1);
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CREATE TABLE t2 (
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pk int(11) NOT NULL AUTO_INCREMENT,
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int_key int(11) DEFAULT NULL,
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PRIMARY KEY (pk),
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KEY int_key (int_key)
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);
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INSERT INTO t2 VALUES (1,1),(2,6),(3,0);
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EXPLAIN EXTENDED
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SELECT MIN(t1.pk)
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FROM t1 WHERE EXISTS (
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SELECT t2.pk
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FROM t2
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WHERE t2.int_key IS NULL
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GROUP BY t2.pk
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);
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DROP TABLE t1, t2;
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-- echo #
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-- echo # BUG#42048 Discrepancy between MyISAM and Maria's ICP implementation
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-- echo #
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int, b char(20), filler char(200), key(a,b(10)));
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insert into t1 select A.a + 10*(B.a + 10*C.a), 'bbb','filler' from t0 A, t0 B, t0 C;
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update t1 set b=repeat(char(65+a), 20) where a < 25;
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--echo This must show range + using index condition:
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explain select * from t1 where a < 10 and b = repeat(char(65+a), 20);
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select * from t1 where a < 10 and b = repeat(char(65+a), 20);
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drop table t0,t1;
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-- echo #
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-- echo # BUG#41136: ORDER BY + range access: EXPLAIN shows "Using MRR" while MRR is actually not used
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-- echo #
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int, b int, key(a));
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insert into t1 select A.a + 10 *(B.a + 10*C.a), A.a + 10 *(B.a + 10*C.a) from t0 A, t0 B, t0 C;
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-- echo This mustn't show "Using MRR":
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explain select * from t1 where a < 20 order by a;
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drop table t0, t1;
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-- echo #
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-- echo # Part of MWL#67: DS-MRR backport: add an @@optimizer_switch flag for
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-- echo # index_condition pushdown:
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-- echo # - engine_condition_pushdown does not affect ICP
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# Check that optimizer_switch is present
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select @@optimizer_switch like '%index_condition_pushdown=on%';
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# Check if it affects ICP
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int, b int, key(a));
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insert into t1 select A.a + 10 *(B.a + 10*C.a), A.a + 10 *(B.a + 10*C.a) from t0 A, t0 B, t0 C;
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-- echo A query that will use ICP:
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explain select * from t1 where a < 20;
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set @save_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='index_condition_pushdown=off';
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explain select * from t1 where a < 20;
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set optimizer_switch='index_condition_pushdown=on';
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explain select * from t1 where a < 20;
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set optimizer_switch=@save_optimizer_switch;
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--echo #
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--echo # BUG#629684: Unreachable code in multi_range_read.cc in maria-5.3-dsmrr-cpk
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--echo #
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delete from t0 where a > 2;
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insert into t0 values (NULL),(NULL);
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insert into t1 values (NULL, 1234), (NULL, 5678);
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set @save_join_cache_level=@@join_cache_level;
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set @@join_cache_level=6;
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explain
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select * from t0, t1 where t0.a<=>t1.a;
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select * from t0, t1 where t0.a<=>t1.a;
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set @@join_cache_level=@save_join_cache_level;
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drop table t0, t1;
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--echo #
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--echo # BUG#625841: Assertion `!table || (!table->read_set || bitmap_is_set
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--echo # (table->read_set, field_index))' on REPLACE ... SELECT with MRR
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--echo #
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (
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key1 varchar(10),
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col1 char(255), col2 char(255),
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col3 char(244), col4 char(255),
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key(key1)
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);
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create table t2 like t1;
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insert into t1
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select
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1000+A.a+100*B.a + 10*C.a,
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'col1val', 'col2val',
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'col3val', 'col4val'
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from t0 A, t0 B, t0 C;
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REPLACE INTO t2(col2,col3,col4)
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SELECT col2,col3,col4
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FROM t1
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WHERE `key1` LIKE CONCAT( LEFT( '1' , 7 ) , '%' )
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ORDER BY col1 LIMIT 7;
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drop table t0, t1, t2;
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--echo #
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--echo # BUG#670417: Diverging results in maria-5.3-mwl128-dsmrr-cpk with join buffer (incremental, BKA join)
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--echo #
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set @save_join_cache_level = @@join_cache_level;
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set join_cache_level = 6;
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set @save_join_buffer_size=@@join_buffer_size;
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--disable_warnings
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set join_buffer_size = 136;
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--enable_warnings
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CREATE TABLE t1 (
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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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col_varchar_nokey varchar(1) NOT NULL,
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PRIMARY KEY (pk),
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KEY col_varchar_key (col_varchar_key,col_int_key)
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) CHARSET=latin1;
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INSERT INTO t1 VALUES
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(10,8,'v','v'),(11,8,'f','f'), (12,5,'v','v'),
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(13,8,'s','s'),(14,8,'a','a'),(15,6,'p','p'),
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(16,7,'z','z'),(17,2,'a','a'),(18,5,'h','h'),
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(19,7,'h','h'),(20,2,'v','v'),(21,9,'v','v'),
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(22,142,'b','b'),(23,3,'y','y'),(24,0,'v','v'),
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(25,3,'m','m'),(26,5,'z','z'),(27,9,'n','n'),
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(28,1,'d','d'),(29,107,'a','a');
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INSERT INTO t1 VALUES
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(110,8,'v','v'),(111,8,'f','f'), (112,5,'v','v'),
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(113,8,'s','s'),(114,8,'a','a'),(115,6,'p','p'),
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(116,7,'z','z'),(117,2,'a','a'),(118,5,'h','h'),
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(119,7,'h','h'),(120,2,'v','v'),(121,9,'v','v'),
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(122,142,'b','b'),(123,3,'y','y'),(124,0,'v','v'),
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(125,3,'m','m'),(126,5,'z','z'),(127,9,'n','n'),
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(128,1,'d','d'),(129,107,'a','a');
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SELECT COUNT(*)
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FROM
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t1 AS table2, t1 AS table3
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where
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table3.col_varchar_key = table2.col_varchar_key AND
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table3.col_varchar_key = table2.col_varchar_nokey AND
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table3.pk<>0;
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EXPLAIN SELECT COUNT(*)
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FROM
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t1 AS table2, t1 AS table3
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where
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table3.col_varchar_key = table2.col_varchar_key AND
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table3.col_varchar_key = table2.col_varchar_nokey AND
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table3.pk<>0;
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set join_cache_level= @save_join_cache_level;
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set join_buffer_size= @save_join_buffer_size;
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drop table t1;
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--echo #
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--echo # BUG#730133: Wrong result with jkl = 7, BKA, ICP in maria-5.3 + compound index
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--echo #
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set @tmp_730133_jcl= @@join_cache_level;
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set join_cache_level = 7;
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set @tmp_730133_os= @@optimizer_switch;
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set optimizer_switch= 'join_cache_hashed=off,join_cache_bka=on,index_condition_pushdown=on,optimize_join_buffer_size=on';
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CREATE TABLE t1 (f1 int, f2 int, f3 int, f4 int, f5 int, KEY (f4,f3));
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INSERT IGNORE INTO t1 VALUES ('2','9','5','0','0'),('4','7','0','0','0'),
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('6','97','190','0','0'),('7','3','6','0','0'),('11','101','186','0','0'),
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('14','194','226','0','0'),('15','148','133','0','0'),
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('16','9','6','0','0'),('17','9','3','0','0'),('18','1','8','0','0'),
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('19','1','5','0','0'),('20','5','7','0','0');
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explain
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SELECT COUNT(alias2.f2)
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FROM
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t1 STRAIGHT_JOIN
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t1 AS alias3 STRAIGHT_JOIN
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t1 AS alias2 FORCE KEY (f4)
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WHERE
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alias2.f4=alias3.f5 AND
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alias2.f3 > alias3.f1;
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SELECT COUNT(alias2.f2)
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FROM
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t1 STRAIGHT_JOIN
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t1 AS alias3 STRAIGHT_JOIN
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t1 AS alias2 FORCE KEY (f4)
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WHERE
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alias2.f4=alias3.f5 AND
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alias2.f3 > alias3.f1;
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set @@join_cache_level= @tmp_730133_jcl;
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set @@optimizer_switch= @tmp_730133_os;
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drop table t1;
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--echo #
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--echo # Test of MRR handler counters
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--echo #
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--disable_ps2_protocol
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flush status;
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show status like 'Handler_mrr%';
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int, b int, filler char(200), key(a));
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insert into t1 select seq, 123, 'filler' from seq_0_to_14999;
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explain select sum(b) from t1 where a < 10;
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--echo # This should show one MRR scan and no re-fills:
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flush status;
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select sum(b) from t1 where a < 10;
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show status like 'handler_mrr%';
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set @mrr_buffer_size_save= @@mrr_buffer_size;
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--disable_warnings
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set mrr_buffer_size=128;
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--enable_warnings
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explain select sum(b) from t1 where a < 1600;
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--echo # This should show one MRR scan and one extra rowid sort:
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flush status;
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select sum(b) from t1 where a < 1600;
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show status like 'handler_mrr%';
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set @@mrr_buffer_size= @mrr_buffer_size_save;
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--echo #Now, let's check BKA:
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set @join_cache_level_save= @@join_cache_level;
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set @join_buffer_size_save= @@join_buffer_size;
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set join_cache_level=6;
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explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
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flush status;
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select sum(t1.b) from t0,t1 where t0.a=t1.a;
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show status like 'handler_mrr%';
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--disable_warnings
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set join_buffer_size=10;
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--enable_warnings
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explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
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flush status;
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select sum(t1.b) from t0,t1 where t0.a=t1.a;
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# the values below depend on sizeof(void*)
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--replace_result 1 ok 2 ok 4 ok
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show status like 'handler_mrr%';
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set join_cache_level= @join_cache_level_save;
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set join_buffer_size= @join_buffer_size_save;
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--enable_ps2_protocol
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drop table t0, t1;
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## This must be last line in the file:
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set optimizer_switch= @myisam_mrr_tmp;
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