mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 14:33:32 +03:00
334 lines
11 KiB
Plaintext
334 lines
11 KiB
Plaintext
drop table if exists t1,t2;
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set @`test`=1,@TEST=3,@select=2,@t5=1.23456;
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select @test,@`select`,@TEST,@not_used;
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@test @`select` @TEST @not_used
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1 2 3 NULL
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set @test_int=10,@test_double=1e-10,@test_string="abcdeghi",@test_string2="abcdefghij",@select=NULL;
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select @test_int,@test_double,@test_string,@test_string2,@select;
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@test_int @test_double @test_string @test_string2 @select
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10 1e-10 abcdeghi abcdefghij NULL
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set @test_int="hello",@test_double="hello",@test_string="hello",@test_string2="hello";
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select @test_int,@test_double,@test_string,@test_string2;
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@test_int @test_double @test_string @test_string2
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hello hello hello hello
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set @test_int="hellohello",@test_double="hellohello",@test_string="hellohello",@test_string2="hellohello";
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select @test_int,@test_double,@test_string,@test_string2;
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@test_int @test_double @test_string @test_string2
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hellohello hellohello hellohello hellohello
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set @test_int=null,@test_double=null,@test_string=null,@test_string2=null;
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select @test_int,@test_double,@test_string,@test_string2;
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@test_int @test_double @test_string @test_string2
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NULL NULL NULL NULL
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select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
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@t1:=(@t2:=1)+@t3:=4 @t1 @t2 @t3
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5 5 1 4
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select @t5;
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@t5
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1.23456
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CREATE TABLE t1 (c_id INT(4) NOT NULL, c_name CHAR(20), c_country CHAR(3), PRIMARY KEY(c_id));
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INSERT INTO t1 VALUES (1,'Bozo','USA'),(2,'Ronald','USA'),(3,'Kinko','IRE'),(4,'Mr. Floppy','GB');
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SELECT @min_cid:=min(c_id), @max_cid:=max(c_id) from t1;
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@min_cid:=min(c_id) @max_cid:=max(c_id)
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1 4
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SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid;
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c_id c_name c_country
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1 Bozo USA
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4 Mr. Floppy GB
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SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid OR c_id=666;
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c_id c_name c_country
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1 Bozo USA
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4 Mr. Floppy GB
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ALTER TABLE t1 DROP PRIMARY KEY;
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select * from t1 where c_id=@min_cid OR c_id=@max_cid;
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c_id c_name c_country
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1 Bozo USA
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4 Mr. Floppy GB
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drop table t1;
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set max_join_size=100;
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show variables like 'max_join_size';
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Variable_name Value
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max_join_size 100
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show global variables like 'max_join_size';
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Variable_name Value
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max_join_size 10
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set GLOBAL max_join_size=2000;
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show global variables like 'max_join_size';
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Variable_name Value
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max_join_size 2000
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set max_join_size=DEFAULT;
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show variables like 'max_join_size';
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Variable_name Value
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max_join_size 2000
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set GLOBAL max_join_size=DEFAULT;
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show global variables like 'max_join_size';
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Variable_name Value
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max_join_size HA_POS_ERROR
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set @@max_join_size=1000, @@global.max_join_size=2000;
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select @@local.max_join_size, @@global.max_join_size;
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@@session.max_join_size @@global.max_join_size
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1000 2000
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select @@identity, length(@@version)>0;
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@@identity length(@@version)>0
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0 1
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select @@VERSION=version();
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@@VERSION=version()
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1
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select last_insert_id(345);
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last_insert_id(345)
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345
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select @@IDENTITY,last_insert_id(), @@identity;
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@@IDENTITY last_insert_id() @@identity
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345 345 345
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set big_tables=OFF, big_tables=ON, big_tables=0, big_tables=1, big_tables="OFF", big_tables="ON";
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set global concurrent_insert=ON;
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show variables like 'concurrent_insert';
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Variable_name Value
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concurrent_insert ON
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set global concurrent_insert=1;
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show variables like 'concurrent_insert';
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Variable_name Value
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concurrent_insert ON
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set global concurrent_insert=0;
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show variables like 'concurrent_insert';
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Variable_name Value
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concurrent_insert OFF
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set global concurrent_insert=OFF;
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show variables like 'concurrent_insert';
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Variable_name Value
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concurrent_insert OFF
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set global concurrent_insert=DEFAULT;
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show variables like 'concurrent_insert';
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Variable_name Value
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concurrent_insert ON
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set table_type=MYISAM, table_type="HEAP", global table_type="INNODB";
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show local variables like 'table_type';
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Variable_name Value
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table_type HEAP
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show global variables like 'table_type';
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Variable_name Value
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table_type INNODB
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set GLOBAL query_cache_size=100000;
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set GLOBAL myisam_max_sort_file_size=2000000;
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show global variables like 'myisam_max_sort_file_size';
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Variable_name Value
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myisam_max_sort_file_size 1048576
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set GLOBAL myisam_max_sort_file_size=default;
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show variables like 'myisam_max_sort_file_size';
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Variable_name Value
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myisam_max_sort_file_size FILE_SIZE
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set global net_retry_count=10, session net_retry_count=10;
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set global net_buffer_length=1024, net_write_timeout=200, net_read_timeout=300;
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set session net_buffer_length=2048, net_write_timeout=500, net_read_timeout=600;
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show global variables like 'net_%';
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Variable_name Value
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net_buffer_length 1024
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net_read_timeout 300
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net_retry_count 10
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net_write_timeout 200
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show session variables like 'net_%';
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Variable_name Value
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net_buffer_length 2048
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net_read_timeout 600
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net_retry_count 10
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net_write_timeout 500
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set session net_buffer_length=8000, global net_read_timeout=900, net_write_timeout=1000;
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show global variables like 'net_%';
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Variable_name Value
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net_buffer_length 1024
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net_read_timeout 900
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net_retry_count 10
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net_write_timeout 1000
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show session variables like 'net_%';
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Variable_name Value
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net_buffer_length 7168
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net_read_timeout 600
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net_retry_count 10
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net_write_timeout 500
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set net_buffer_length=1;
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show variables like 'net_buffer_length';
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Variable_name Value
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net_buffer_length 1024
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set net_buffer_length=2000000000;
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show variables like 'net_buffer_length';
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Variable_name Value
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net_buffer_length 1048576
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set character set cp1251_koi8;
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show variables like "character_set_client";
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Variable_name Value
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character_set_client cp1251
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select @@timestamp>0;
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@@timestamp>0
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1
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set @@rand_seed1=10000000,@@rand_seed2=1000000;
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select ROUND(RAND(),5);
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ROUND(RAND(),5)
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0.02887
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set big_tables=OFFF;
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ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
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set big_tables="OFFF";
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ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
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set unknown_variable=1;
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ERROR HY000: Unknown system variable 'unknown_variable'
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set max_join_size="hello";
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ERROR 42000: Wrong argument type to variable 'max_join_size'
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set table_type=UNKNOWN_TABLE_TYPE;
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ERROR 42000: Variable 'table_type' can't be set to the value of 'UNKNOWN_TABLE_TYPE'
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set table_type=INNODB, big_tables=2;
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ERROR 42000: Variable 'big_tables' can't be set to the value of '2'
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show local variables like 'table_type';
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Variable_name Value
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table_type HEAP
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set SESSION query_cache_size=10000;
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ERROR HY000: Variable 'query_cache_size' is a GLOBAL variable and should be set with SET GLOBAL
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set GLOBAL table_type=DEFAULT;
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ERROR 42000: Variable 'table_type' doesn't have a default value
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set character_set_client=UNKNOWN_CHARACTER_SET;
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ERROR 42000: Unknown character set: 'UNKNOWN_CHARACTER_SET'
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set collation_connection=UNKNOWN_COLLATION;
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ERROR HY000: Unknown collation: 'UNKNOWN_COLLATION'
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set global autocommit=1;
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ERROR HY000: Variable 'autocommit' is a LOCAL variable and can't be used with SET GLOBAL
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select @@global.timestamp;
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ERROR HY000: Variable 'timestamp' is a LOCAL variable and can't be used with SET GLOBAL
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set @@version='';
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ERROR HY000: Unknown system variable 'version'
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set @@concurrent_insert=1;
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ERROR HY000: Variable 'concurrent_insert' is a GLOBAL variable and should be set with SET GLOBAL
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set @@global.sql_auto_is_null=1;
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ERROR HY000: Variable 'sql_auto_is_null' is a LOCAL variable and can't be used with SET GLOBAL
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select @@global.sql_auto_is_null;
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ERROR HY000: Variable 'sql_auto_is_null' is a LOCAL variable and can't be used with SET GLOBAL
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set myisam_max_sort_file_size=100;
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ERROR HY000: Variable 'myisam_max_sort_file_size' is a GLOBAL variable and should be set with SET GLOBAL
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set myisam_max_extra_sort_file_size=100;
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ERROR HY000: Variable 'myisam_max_extra_sort_file_size' is a GLOBAL variable and should be set with SET GLOBAL
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set autocommit=1;
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set big_tables=1;
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select @@autocommit, @@big_tables;
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@@autocommit @@big_tables
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1 1
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set global binlog_cache_size=100;
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set bulk_insert_buffer_size=100;
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set character set cp1251_koi8;
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set character set default;
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set @@global.concurrent_insert=1;
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set global connect_timeout=100;
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select @@delay_key_write;
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@@delay_key_write
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ON
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set global delay_key_write="OFF";
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select @@delay_key_write;
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@@delay_key_write
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OFF
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set global delay_key_write=ALL;
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select @@delay_key_write;
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@@delay_key_write
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ALL
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set global delay_key_write=1;
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select @@delay_key_write;
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@@delay_key_write
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ON
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set global delayed_insert_limit=100;
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set global delayed_insert_timeout=100;
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set global delayed_queue_size=100;
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set global flush=1;
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set global flush_time=100;
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set insert_id=1;
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set interactive_timeout=100;
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set join_buffer_size=100;
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set last_insert_id=1;
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set global local_infile=1;
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set long_query_time=100;
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set low_priority_updates=1;
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set max_allowed_packet=100;
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set global max_binlog_cache_size=100;
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set global max_binlog_size=100;
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set global max_connect_errors=100;
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set global max_connections=100;
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set global max_delayed_threads=100;
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set max_heap_table_size=100;
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set max_join_size=100;
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set max_sort_length=100;
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set max_tmp_tables=100;
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set global max_user_connections=100;
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select @@max_user_connections;
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@@max_user_connections
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100
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set global max_write_lock_count=100;
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set global myisam_max_extra_sort_file_size=100;
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select @@myisam_max_extra_sort_file_size;
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@@myisam_max_extra_sort_file_size
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100
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set global myisam_max_sort_file_size=100;
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set myisam_sort_buffer_size=100;
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set net_buffer_length=100;
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set net_read_timeout=100;
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set net_write_timeout=100;
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set global query_cache_limit=100;
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set global query_cache_size=100;
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set global query_cache_type=demand;
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set read_buffer_size=100;
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set read_rnd_buffer_size=100;
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set global rpl_recovery_rank=100;
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set global server_id=100;
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set global slave_net_timeout=100;
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set global slow_launch_time=100;
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set sort_buffer_size=100;
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set sql_auto_is_null=1;
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select @@sql_auto_is_null;
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@@sql_auto_is_null
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1
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set @@sql_auto_is_null=0;
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select @@sql_auto_is_null;
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@@sql_auto_is_null
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0
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set sql_big_selects=1;
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set sql_big_tables=1;
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set sql_buffer_result=1;
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set sql_log_bin=1;
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set sql_log_off=1;
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set sql_log_update=1;
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set sql_low_priority_updates=1;
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set sql_max_join_size=200;
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select @@sql_max_join_size,@@max_join_size;
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@@sql_max_join_size @@max_join_size
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200 200
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set sql_quote_show_create=1;
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set sql_safe_updates=1;
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set sql_select_limit=1;
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set global sql_slave_skip_counter=100;
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set sql_warnings=1;
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set global table_cache=100;
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set table_type=myisam;
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set global thread_cache_size=100;
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set timestamp=1, timestamp=default;
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set tmp_table_size=100;
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set tx_isolation="READ-COMMITTED";
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set wait_timeout=100;
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set log_warnings=1;
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create table t1 (a int not null auto_increment, primary key(a));
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create table t2 (a int not null auto_increment, primary key(a));
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insert into t1 values(null),(null),(null);
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insert into t2 values(null),(null),(null);
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set global key_buffer_size=100000;
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select @@key_buffer_size;
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@@key_buffer_size
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98304
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select * from t1 where a=2;
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a
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2
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select * from t2 where a=3;
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a
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3
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check table t1,t2;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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test.t2 check status OK
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select max(a) +1, max(a) +2 into @xx,@yy from t1;
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drop table t1,t2;
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select @@xxxxxxxxxx;
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ERROR HY000: Unknown system variable 'xxxxxxxxxx'
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select 1;
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1
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1
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