mirror of
https://github.com/MariaDB/server.git
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31ba88c0c1
Added bug fix from 3.23 for AIX 4.3.3 and gcc 3.x Small change in EXCHANGE output Propagate open-files-limit from mysqld_safe -> mysqld Fixed speed bug in GROUP BY Added quotes around database name in CREATE DATABASE db_name (for binary log) BitKeeper/etc/ignore: added stamp-h1 Docs/manual.texi: Added 4.1 manual section Updated changelog client/mysqltest.c: Added --skip-safemalloc include/my_global.h: Added bug fix from 3.23 for AIX 4.3.3 and gcc 3.x mysql-test/mysql-test-run.sh: Start mysqltest with --skip-safemalloc (To get it faster) mysql-test/r/bdb.result: Update for new EXPLAIN output mysql-test/r/compare.result: Update for new EXPLAIN output mysql-test/r/create.result: Update for new EXPLAIN output mysql-test/r/distinct.result: Update for new EXPLAIN output mysql-test/r/explain.result: Update for new EXPLAIN output mysql-test/r/group_by.result: Update for new EXPLAIN output mysql-test/r/heap.result: Update for new EXPLAIN output mysql-test/r/innodb.result: Update for new EXPLAIN output mysql-test/r/join_outer.result: Update for new EXPLAIN output mysql-test/r/key_diff.result: Update for new EXPLAIN output mysql-test/r/merge.result: Update for new EXPLAIN output mysql-test/r/null_key.result: Update for new EXPLAIN output mysql-test/r/order_by.result: Update for new EXPLAIN output mysql-test/r/select.result: Update for new EXPLAIN output mysql-test/r/temp_table.result: Fixed speed bug in GROUP BY mysql-test/r/type_datetime.result: Update for new EXPLAIN output mysql-test/r/user_var.result: Update for new EXPLAIN output mysql-test/r/variables.result: Removed variable safe_show_database mysql-test/t/temp_table.test: Fixed speed bug in GROUP BY mysql-test/t/variables.test: Removed not used variable safe_show_databases scripts/mysqld_safe.sh: Propagate open-files-limit from mysqld_safe -> mysqld sql/mysqld.cc: Removed variable safe_show_database sql/set_var.cc: Removed variable safe_show_database sql/slave.cc: Updated error message sql/sql_db.cc: Added quotes around database name in CREATE DATABASE db_name sql/sql_select.cc: Fixed speed bug in GROUP BY
231 lines
7.6 KiB
Plaintext
231 lines
7.6 KiB
Plaintext
drop table if exists t1;
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create table t1 (a int, b int not null,unique key (a,b),index(b)) type=myisam;
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insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6);
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explain select * from t1 where a is null;
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table type possible_keys key key_len ref rows Extra
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t1 ref a a 5 const 3 Using where; Using index
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explain select * from t1 where a is null and b = 2;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 9 const,const 1 Using where; Using index
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explain select * from t1 where a is null and b = 7;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 9 const,const 1 Using where; Using index
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explain select * from t1 where a=2 and b = 2;
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table type possible_keys key key_len ref rows Extra
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t1 const a,b a 9 const,const 1
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explain select * from t1 where a<=>b limit 2;
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table type possible_keys key key_len ref rows Extra
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t1 index NULL a 9 NULL 12 Using where; Using index
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explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
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table type possible_keys key key_len ref rows Extra
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t1 range a,b a 9 NULL 3 Using where; Using index
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explain select * from t1 where (a is null or a = 7) and b=7;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b b 4 const 2 Using where
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explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 3 Using where; Using index
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explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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table type possible_keys key key_len ref rows Extra
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t1 range a,b a 9 NULL 2 Using where; Using index
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explain select * from t1 where a > 1 and a < 3 limit 1;
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table type possible_keys key key_len ref rows Extra
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t1 range a a 5 NULL 1 Using where; Using index
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explain select * from t1 where a > 8 and a < 9;
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table type possible_keys key key_len ref rows Extra
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t1 range a a 5 NULL 1 Using where; Using index
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select * from t1 where a is null;
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a b
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NULL 7
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NULL 9
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NULL 9
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select * from t1 where a is null and b = 7;
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a b
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NULL 7
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select * from t1 where a<=>b limit 2;
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a b
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1 1
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2 2
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select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
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a b
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1 1
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2 2
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select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
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a b
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NULL 9
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NULL 9
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select * from t1 where (a is null or a = 7) and b=7;
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a b
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NULL 7
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7 7
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select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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a b
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NULL 7
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NULL 9
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NULL 9
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alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
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explain select * from t1 where a is null and b = 2;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 3 Using where
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explain select * from t1 where a is null and b = 2 and c=0;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 3 Using where
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explain select * from t1 where a is null and b = 7 and c=0;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 3 Using where
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explain select * from t1 where a=2 and b = 2;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 1 Using where
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explain select * from t1 where a<=>b limit 2;
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table type possible_keys key key_len ref rows Extra
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t1 ALL NULL NULL NULL NULL 12 Using where
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explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 and c=0 limit 3;
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table type possible_keys key key_len ref rows Extra
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t1 range a,b a 5 NULL 5 Using where
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explain select * from t1 where (a is null or a = 7) and b=7 and c=0;
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table type possible_keys key key_len ref rows Extra
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t1 range a,b a 5 NULL 4 Using where
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explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 3 Using where
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explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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table type possible_keys key key_len ref rows Extra
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t1 ref a,b a 5 const 3 Using where
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explain select * from t1 where a > 1 and a < 3 limit 1;
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table type possible_keys key key_len ref rows Extra
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t1 range a a 5 NULL 1 Using where
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explain select * from t1 where a is null and b=7 or a > 1 and a < 3 limit 1;
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table type possible_keys key key_len ref rows Extra
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t1 range a,b a 5 NULL 4 Using where
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explain select * from t1 where a > 8 and a < 9;
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table type possible_keys key key_len ref rows Extra
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t1 range a a 5 NULL 1 Using where
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explain select * from t1 where b like "6%";
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table type possible_keys key key_len ref rows Extra
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t1 range b b 12 NULL 1 Using where
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select * from t1 where a is null;
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a b c
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NULL 7 0
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NULL 9 0
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NULL 9 0
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select * from t1 where a is null and b = 7 and c=0;
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a b c
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NULL 7 0
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select * from t1 where a<=>b limit 2;
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a b c
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1 1 0
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2 2 0
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select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
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a b c
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1 1 0
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2 2 0
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select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
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a b c
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NULL 9 0
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NULL 9 0
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select * from t1 where (a is null or a = 7) and b=7 and c=0;
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a b c
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NULL 7 0
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7 7 0
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select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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a b c
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NULL 7 0
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NULL 9 0
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NULL 9 0
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select * from t1 where b like "6%";
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a b c
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6 6 0
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drop table t1;
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DROP TABLE IF EXISTS t1,t2;
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CREATE TABLE t1 (
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id int(10) unsigned NOT NULL auto_increment,
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uniq_id int(10) unsigned default NULL,
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PRIMARY KEY (id),
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UNIQUE KEY idx1 (uniq_id)
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) TYPE=MyISAM;
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CREATE TABLE t2 (
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id int(10) unsigned NOT NULL auto_increment,
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uniq_id int(10) unsigned default NULL,
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PRIMARY KEY (id)
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) TYPE=MyISAM;
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INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
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INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
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explain select id from t1 where uniq_id is null;
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table type possible_keys key key_len ref rows Extra
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t1 ref idx1 idx1 5 const 1 Using where
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explain select id from t1 where uniq_id =1;
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table type possible_keys key key_len ref rows Extra
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t1 const idx1 idx1 5 const 1
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UPDATE t1 SET id=id+100 where uniq_id is null;
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UPDATE t2 SET id=id+100 where uniq_id is null;
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select id from t1 where uniq_id is null;
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id
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101
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102
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105
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106
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109
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110
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select id from t2 where uniq_id is null;
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id
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101
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102
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105
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106
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109
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110
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DELETE FROM t1 WHERE uniq_id IS NULL;
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DELETE FROM t2 WHERE uniq_id IS NULL;
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SELECT * FROM t1 ORDER BY uniq_id, id;
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id uniq_id
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3 1
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4 2
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7 3
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8 4
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SELECT * FROM t2 ORDER BY uniq_id, id;
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id uniq_id
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3 1
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4 2
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7 3
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8 4
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DROP table t1,t2;
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CREATE TABLE `t1` (
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`order_id` char(32) NOT NULL default '',
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`product_id` char(32) NOT NULL default '',
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`product_type` int(11) NOT NULL default '0',
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PRIMARY KEY (`order_id`,`product_id`,`product_type`)
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) TYPE=MyISAM;
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CREATE TABLE `t2` (
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`order_id` char(32) NOT NULL default '',
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`product_id` char(32) NOT NULL default '',
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`product_type` int(11) NOT NULL default '0',
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PRIMARY KEY (`order_id`,`product_id`,`product_type`)
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) TYPE=MyISAM;
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INSERT INTO t1 (order_id, product_id, product_type) VALUES
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('3d7ce39b5d4b3e3d22aaafe9b633de51',1206029, 3),
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('3d7ce39b5d4b3e3d22aaafe9b633de51',5880836, 3),
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('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
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INSERT INTO t2 (order_id, product_id, product_type) VALUES
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('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
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select t1.* from t1
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left join t2 using(order_id, product_id, product_type)
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where t2.order_id=NULL;
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order_id product_id product_type
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select t1.* from t1
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left join t2 using(order_id, product_id, product_type)
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where t2.order_id is NULL;
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order_id product_id product_type
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3d7ce39b5d4b3e3d22aaafe9b633de51 1206029 3
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3d7ce39b5d4b3e3d22aaafe9b633de51 5880836 3
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drop table t1,t2;
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create table t1 (id int);
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insert into t1 values (null), (0);
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create table t2 (id int);
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insert into t2 values (null);
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select * from t1, t2 where t1.id = t2.id;
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id id
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alter table t1 add key id (id);
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select * from t1, t2 where t1.id = t2.id;
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id id
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drop table t1,t2;
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