mirror of
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a777907a51
Variable character_set_system is selectable now
More accurate error message results during
update of character_set_system and some other read only variables
mysql-test/r/variables.result:
Fix for bug#11775 Variable character_set_system does not exist (sometimes).
test case
mysql-test/t/variables.test:
Fix for bug#11775 Variable character_set_system does not exist (sometimes).
test case
555 lines
19 KiB
Plaintext
555 lines
19 KiB
Plaintext
drop table if exists t1,t2;
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set @`test`=1;
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select @test, @`test`, @TEST, @`TEST`, @"teSt";
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@test @`test` @TEST @`TEST` @"teSt"
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1 1 1 1 1
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set @TEST=2;
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select @test, @`test`, @TEST, @`TEST`, @"teSt";
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@test @`test` @TEST @`TEST` @"teSt"
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2 2 2 2 2
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set @"tEST"=3;
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select @test, @`test`, @TEST, @`TEST`, @"teSt";
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@test @`test` @TEST @`TEST` @"teSt"
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3 3 3 3 3
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set @`TeST`=4;
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select @test, @`test`, @TEST, @`TEST`, @"teSt";
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@test @`test` @TEST @`TEST` @"teSt"
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4 4 4 4 4
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select @`teST`:=5;
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@`teST`:=5
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5
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select @test, @`test`, @TEST, @`TEST`, @"teSt";
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@test @`test` @TEST @`TEST` @"teSt"
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5 5 5 5 5
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set @select=2,@t5=1.23456;
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select @`select`,@not_used;
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@`select` @not_used
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2 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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explain extended select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select sql_no_cache (@t1:=((@t2:=1) + (@t3:=4))) AS `@t1:=(@t2:=1)+@t3:=4`,(@t1) AS `@t1`,(@t2) AS `@t2`,(@t3) AS `@t3`
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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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@@local.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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explain extended select last_insert_id(345);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select sql_no_cache last_insert_id(345) AS `last_insert_id(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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explain extended select @@IDENTITY,last_insert_id(), @@identity;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select sql_no_cache 345 AS `@@IDENTITY`,last_insert_id() AS `last_insert_id()`,345 AS `@@identity`
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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=2;
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show variables like 'concurrent_insert';
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Variable_name Value
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concurrent_insert 2
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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 1
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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 0
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set global concurrent_insert=DEFAULT;
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select @@concurrent_insert;
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@@concurrent_insert
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1
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set global timed_mutexes=ON;
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show variables like 'timed_mutexes';
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Variable_name Value
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timed_mutexes ON
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set global timed_mutexes=0;
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show variables like 'timed_mutexes';
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Variable_name Value
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timed_mutexes OFF
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set storage_engine=MYISAM, storage_engine="HEAP", global storage_engine="MERGE";
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show local variables like 'storage_engine';
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Variable_name Value
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storage_engine MEMORY
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show global variables like 'storage_engine';
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Variable_name Value
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storage_engine MERGE
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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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show variables like '%alloc%';
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Variable_name Value
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query_alloc_block_size 8192
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query_prealloc_size 8192
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range_alloc_block_size 2048
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transaction_alloc_block_size 8192
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transaction_prealloc_size 4096
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set @@range_alloc_block_size=1024*16;
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set @@query_alloc_block_size=1024*17+2;
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set @@query_prealloc_size=1024*18;
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set @@transaction_alloc_block_size=1024*20-1;
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set @@transaction_prealloc_size=1024*21-1;
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select @@query_alloc_block_size;
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@@query_alloc_block_size
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17408
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show variables like '%alloc%';
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Variable_name Value
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query_alloc_block_size 17408
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query_prealloc_size 18432
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range_alloc_block_size 16384
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transaction_alloc_block_size 19456
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transaction_prealloc_size 20480
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set @@range_alloc_block_size=default;
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set @@query_alloc_block_size=default, @@query_prealloc_size=default;
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set transaction_alloc_block_size=default, @@transaction_prealloc_size=default;
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show variables like '%alloc%';
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Variable_name Value
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query_alloc_block_size 8192
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query_prealloc_size 8192
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range_alloc_block_size 2048
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transaction_alloc_block_size 8192
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transaction_prealloc_size 4096
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SELECT @@version LIKE 'non-existent';
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@@version LIKE 'non-existent'
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0
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SELECT @@version_compile_os LIKE 'non-existent';
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@@version_compile_os LIKE 'non-existent'
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0
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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: Incorrect argument type to variable 'max_join_size'
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set storage_engine=UNKNOWN_TABLE_TYPE;
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ERROR 42000: Unknown table engine 'UNKNOWN_TABLE_TYPE'
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set storage_engine=MERGE, 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 'storage_engine';
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Variable_name Value
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storage_engine MEMORY
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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 storage_engine=DEFAULT;
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ERROR 42000: Variable 'storage_engine' 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 character_set_client=NULL;
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ERROR 42000: Variable 'character_set_client' can't be set to the value of 'NULL'
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set collation_connection=NULL;
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ERROR 42000: Variable 'collation_connection' can't be set to the value of 'NULL'
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set global autocommit=1;
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ERROR HY000: Variable 'autocommit' is a SESSION 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 SESSION variable
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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 SESSION 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 SESSION variable
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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 @@SQL_WARNINGS=NULL;
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ERROR 42000: Variable 'sql_warnings' can't be set to the value of 'NULL'
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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 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 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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Warnings:
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Note 1315 The update log is deprecated and replaced by the binary log; SET SQL_LOG_UPDATE has been ignored
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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 sql_warnings=1;
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set global table_cache=100;
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set storage_engine=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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select @@session.key_buffer_size;
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ERROR HY000: Variable 'key_buffer_size' is a GLOBAL variable
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set ft_boolean_syntax = @@init_connect;
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ERROR HY000: Variable 'ft_boolean_syntax' is a GLOBAL variable and should be set with SET GLOBAL
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set global ft_boolean_syntax = @@init_connect;
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ERROR 42000: Variable 'ft_boolean_syntax' can't be set to the value of ''
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set init_connect = NULL;
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ERROR HY000: Variable 'init_connect' is a GLOBAL variable and should be set with SET GLOBAL
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set global init_connect = NULL;
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set ft_boolean_syntax = @@init_connect;
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ERROR HY000: Variable 'ft_boolean_syntax' is a GLOBAL variable and should be set with SET GLOBAL
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set global ft_boolean_syntax = @@init_connect;
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ERROR 42000: Variable 'ft_boolean_syntax' can't be set to the value of ''
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set global myisam_max_sort_file_size=4294967296;
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show global variables like 'myisam_max_sort_file_size';
|
|
Variable_name Value
|
|
myisam_max_sort_file_size MAX_FILE_SIZE
|
|
set global myisam_max_sort_file_size=default;
|
|
select @@global.max_user_connections,@@local.max_join_size;
|
|
@@global.max_user_connections @@local.max_join_size
|
|
100 200
|
|
set @svc=@@global.max_user_connections, @svj=@@local.max_join_size;
|
|
select @@global.max_user_connections,@@local.max_join_size;
|
|
@@global.max_user_connections @@local.max_join_size
|
|
100 200
|
|
set @@global.max_user_connections=111,@@local.max_join_size=222;
|
|
select @@global.max_user_connections,@@local.max_join_size;
|
|
@@global.max_user_connections @@local.max_join_size
|
|
111 222
|
|
set @@global.max_user_connections=@@local.max_join_size,@@local.max_join_size=@@global.max_user_connections;
|
|
select @@global.max_user_connections,@@local.max_join_size;
|
|
@@global.max_user_connections @@local.max_join_size
|
|
222 111
|
|
set @@global.max_user_connections=@svc, @@local.max_join_size=@svj;
|
|
select @@global.max_user_connections,@@local.max_join_size;
|
|
@@global.max_user_connections @@local.max_join_size
|
|
100 200
|
|
set @a=1, @b=2;
|
|
set @a=@b, @b=@a;
|
|
select @a, @b;
|
|
@a @b
|
|
2 1
|
|
set @@global.global.key_buffer_size= 1;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size= 1' at line 1
|
|
set GLOBAL global.key_buffer_size= 1;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size= 1' at line 1
|
|
SELECT @@global.global.key_buffer_size;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size' at line 1
|
|
SELECT @@global.session.key_buffer_size;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size' at line 1
|
|
SELECT @@global.local.key_buffer_size;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size' at line 1
|
|
set @tstlw = @@log_warnings;
|
|
show global variables like 'log_warnings';
|
|
Variable_name Value
|
|
log_warnings 1
|
|
set global log_warnings = 0;
|
|
show global variables like 'log_warnings';
|
|
Variable_name Value
|
|
log_warnings 0
|
|
set global log_warnings = 42;
|
|
show global variables like 'log_warnings';
|
|
Variable_name Value
|
|
log_warnings 42
|
|
set global log_warnings = @tstlw;
|
|
show global variables like 'log_warnings';
|
|
Variable_name Value
|
|
log_warnings 1
|
|
create table t1 (
|
|
c1 tinyint,
|
|
c2 smallint,
|
|
c3 mediumint,
|
|
c4 int,
|
|
c5 bigint);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`c1` tinyint(4) default NULL,
|
|
`c2` smallint(6) default NULL,
|
|
`c3` mediumint(9) default NULL,
|
|
`c4` int(11) default NULL,
|
|
`c5` bigint(20) default NULL
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
drop table t1;
|
|
set @arg00= 8, @arg01= 8.8, @arg02= 'a string', @arg03= 0.2e0;
|
|
create table t1 as select @arg00 as c1, @arg01 as c2, @arg02 as c3, @arg03 as c4;
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`c1` bigint(20) default NULL,
|
|
`c2` decimal(65,30) default NULL,
|
|
`c3` longtext,
|
|
`c4` double default NULL
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
drop table t1;
|
|
SET GLOBAL MYISAM_DATA_POINTER_SIZE= 7;
|
|
SHOW VARIABLES LIKE 'MYISAM_DATA_POINTER_SIZE';
|
|
Variable_name Value
|
|
myisam_data_pointer_size 7
|
|
SET GLOBAL table_cache=-1;
|
|
SHOW VARIABLES LIKE 'table_cache';
|
|
Variable_name Value
|
|
table_cache 1
|
|
SET GLOBAL table_cache=DEFAULT;
|
|
set character_set_results=NULL;
|
|
select ifnull(@@character_set_results,"really null");
|
|
ifnull(@@character_set_results,"really null")
|
|
really null
|
|
set names latin1;
|
|
create table t1 (a int);
|
|
select a into @x from t1;
|
|
Warnings:
|
|
Warning 1329 No data to FETCH
|
|
show warnings;
|
|
Level Code Message
|
|
Warning 1329 No data to FETCH
|
|
drop table t1;
|
|
set @@warning_count=1;
|
|
ERROR HY000: Variable 'warning_count' is a read only variable
|
|
set @@global.error_count=1;
|
|
ERROR HY000: Variable 'error_count' is a read only variable
|
|
set @@max_heap_table_size= 4294967296;
|
|
select @@max_heap_table_size > 0;
|
|
@@max_heap_table_size > 0
|
|
1
|
|
set global max_heap_table_size= 4294967296;
|
|
select @@max_heap_table_size > 0;
|
|
@@max_heap_table_size > 0
|
|
1
|
|
set @@max_heap_table_size= 4294967296;
|
|
select @@max_heap_table_size > 0;
|
|
@@max_heap_table_size > 0
|
|
1
|
|
select @@have_innodb;
|
|
@@have_innodb
|
|
#
|
|
select @@character_set_system;
|
|
@@character_set_system
|
|
utf8
|
|
set global character_set_system = latin1;
|
|
ERROR HY000: Variable 'character_set_system' is a read only variable
|
|
set @@global.version_compile_os='234';
|
|
ERROR HY000: Variable 'version_compile_os' is a read only variable
|