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mariadb/mysql-test/r/variables.result
Satya B 801deedcf2 Fix for Bug#37408 - Compressed MyISAM files should not require/use mmap() 
When compressed myisam files are opened, they are always memory mapped
sometimes causing memory swapping problems.

When we mmap the myisam compressed tables of size greater than the memory 
available, the kswapd0 process utilization is very high consuming 30-40% of 
the cpu. This happens only with linux kernels older than 2.6.9

With newer linux kernels, we don't have this problem of high cpu consumption
and this option may not be required.
 
The option 'myisam_mmap_size' is added to limit the amount of memory used for
memory mapping of myisam files. This option is not dynamic.

The default value on 32 bit system is 4294967295 bytes and on 64 bit system it
is 18446744073709547520 bytes.

Note: Testcase only tests the option variable. The actual bug has be to 
tested manually.
2009-12-17 16:55:50 +05:30

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drop table if exists t1,t2;
set @my_binlog_cache_size =@@global.binlog_cache_size;
set @my_connect_timeout =@@global.connect_timeout;
set @my_delayed_insert_timeout =@@global.delayed_insert_timeout;
set @my_delayed_queue_size =@@global.delayed_queue_size;
set @my_flush =@@global.flush;
set @my_flush_time =@@global.flush_time;
set @my_key_buffer_size =@@global.key_buffer_size;
set @my_max_binlog_cache_size =@@global.max_binlog_cache_size;
set @my_max_binlog_size =@@global.max_binlog_size;
set @my_max_connect_errors =@@global.max_connect_errors;
set @my_max_delayed_threads =@@global.max_delayed_threads;
set @my_max_heap_table_size =@@global.max_heap_table_size;
set @my_max_insert_delayed_threads=@@global.max_insert_delayed_threads;
set @my_max_join_size =@@global.max_join_size;
set @my_max_user_connections =@@global.max_user_connections;
set @my_max_write_lock_count =@@global.max_write_lock_count;
set @my_myisam_data_pointer_size =@@global.myisam_data_pointer_size;
set @my_net_buffer_length =@@global.net_buffer_length;
set @my_net_write_timeout =@@global.net_write_timeout;
set @my_net_read_timeout =@@global.net_read_timeout;
set @my_query_cache_limit =@@global.query_cache_limit;
set @my_query_cache_type =@@global.query_cache_type;
set @my_rpl_recovery_rank =@@global.rpl_recovery_rank;
set @my_server_id =@@global.server_id;
set @my_slow_launch_time =@@global.slow_launch_time;
set @my_storage_engine =@@global.storage_engine;
set @my_thread_cache_size =@@global.thread_cache_size;
set @`test`=1;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
@test @`test` @TEST @`TEST` @"teSt"
1 1 1 1 1
set @TEST=2;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
@test @`test` @TEST @`TEST` @"teSt"
2 2 2 2 2
set @"tEST"=3;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
@test @`test` @TEST @`TEST` @"teSt"
3 3 3 3 3
set @`TeST`=4;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
@test @`test` @TEST @`TEST` @"teSt"
4 4 4 4 4
select @`teST`:=5;
@`teST`:=5
5
select @test, @`test`, @TEST, @`TEST`, @"teSt";
@test @`test` @TEST @`TEST` @"teSt"
5 5 5 5 5
set @select=2,@t5=1.23456;
select @`select`,@not_used;
@`select` @not_used
2 NULL
set @test_int=10,@test_double=1e-10,@test_string="abcdeghi",@test_string2="abcdefghij",@select=NULL;
select @test_int,@test_double,@test_string,@test_string2,@select;
@test_int @test_double @test_string @test_string2 @select
10 1e-10 abcdeghi abcdefghij NULL
set @test_int="hello",@test_double="hello",@test_string="hello",@test_string2="hello";
select @test_int,@test_double,@test_string,@test_string2;
@test_int @test_double @test_string @test_string2
hello hello hello hello
set @test_int="hellohello",@test_double="hellohello",@test_string="hellohello",@test_string2="hellohello";
select @test_int,@test_double,@test_string,@test_string2;
@test_int @test_double @test_string @test_string2
hellohello hellohello hellohello hellohello
set @test_int=null,@test_double=null,@test_string=null,@test_string2=null;
select @test_int,@test_double,@test_string,@test_string2;
@test_int @test_double @test_string @test_string2
NULL NULL NULL NULL
select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
@t1:=(@t2:=1)+@t3:=4 @t1 @t2 @t3
5 5 1 4
explain extended select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select (@t1:=((@t2:=1) + (@t3:=4))) AS `@t1:=(@t2:=1)+@t3:=4`,(@t1) AS `@t1`,(@t2) AS `@t2`,(@t3) AS `@t3`
select @t5;
@t5
1.23456
CREATE TABLE t1 (c_id INT(4) NOT NULL, c_name CHAR(20), c_country CHAR(3), PRIMARY KEY(c_id));
INSERT INTO t1 VALUES (1,'Bozo','USA'),(2,'Ronald','USA'),(3,'Kinko','IRE'),(4,'Mr. Floppy','GB');
SELECT @min_cid:=min(c_id), @max_cid:=max(c_id) from t1;
@min_cid:=min(c_id) @max_cid:=max(c_id)
1 4
SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid;
c_id c_name c_country
1 Bozo USA
4 Mr. Floppy GB
SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid OR c_id=666;
c_id c_name c_country
1 Bozo USA
4 Mr. Floppy GB
ALTER TABLE t1 DROP PRIMARY KEY;
select * from t1 where c_id=@min_cid OR c_id=@max_cid;
c_id c_name c_country
1 Bozo USA
4 Mr. Floppy GB
drop table t1;
set GLOBAL max_join_size=10;
set max_join_size=100;
show variables like 'max_join_size';
Variable_name Value
max_join_size 100
show global variables like 'max_join_size';
Variable_name Value
max_join_size 10
set GLOBAL max_join_size=2000;
show global variables like 'max_join_size';
Variable_name Value
max_join_size 2000
set max_join_size=DEFAULT;
show variables like 'max_join_size';
Variable_name Value
max_join_size 2000
set GLOBAL max_join_size=DEFAULT;
show global variables like 'max_join_size';
Variable_name Value
max_join_size HA_POS_ERROR
set @@max_join_size=1000, @@global.max_join_size=2000;
select @@local.max_join_size, @@global.max_join_size;
@@local.max_join_size @@global.max_join_size
1000 2000
select @@identity, length(@@version)>0;
@@identity length(@@version)>0
0 1
select @@VERSION=version();
@@VERSION=version()
1
select last_insert_id(345);
last_insert_id(345)
345
explain extended select last_insert_id(345);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select last_insert_id(345) AS `last_insert_id(345)`
select @@IDENTITY,last_insert_id(), @@identity;
@@IDENTITY last_insert_id() @@identity
345 345 345
explain extended select @@IDENTITY,last_insert_id(), @@identity;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select 345 AS `@@IDENTITY`,last_insert_id() AS `last_insert_id()`,345 AS `@@identity`
set big_tables=OFF, big_tables=ON, big_tables=0, big_tables=1, big_tables="OFF", big_tables="ON";
set global concurrent_insert=2;
show variables like 'concurrent_insert';
Variable_name Value
concurrent_insert 2
set global concurrent_insert=1;
show variables like 'concurrent_insert';
Variable_name Value
concurrent_insert 1
set global concurrent_insert=0;
show variables like 'concurrent_insert';
Variable_name Value
concurrent_insert 0
set global concurrent_insert=DEFAULT;
select @@concurrent_insert;
@@concurrent_insert
1
set global timed_mutexes=ON;
show variables like 'timed_mutexes';
Variable_name Value
timed_mutexes ON
set global timed_mutexes=0;
show variables like 'timed_mutexes';
Variable_name Value
timed_mutexes OFF
set storage_engine=MYISAM, storage_engine="HEAP", global storage_engine="MERGE";
show local variables like 'storage_engine';
Variable_name Value
storage_engine MEMORY
show global variables like 'storage_engine';
Variable_name Value
storage_engine MRG_MYISAM
set GLOBAL query_cache_size=100000;
set GLOBAL myisam_max_sort_file_size=2000000;
show global variables like 'myisam_max_sort_file_size';
Variable_name Value
myisam_max_sort_file_size 1048576
set GLOBAL myisam_max_sort_file_size=default;
show global variables like 'myisam_max_sort_file_size';
Variable_name Value
myisam_max_sort_file_size FILE_SIZE
set global net_retry_count=10, session net_retry_count=10;
set global net_buffer_length=1024, net_write_timeout=200, net_read_timeout=300;
set session net_write_timeout=500, net_read_timeout=600;
show global variables like 'net_%';
Variable_name Value
net_buffer_length 1024
net_read_timeout 300
net_retry_count 10
net_write_timeout 200
show session variables like 'net_%';
Variable_name Value
net_buffer_length 16384
net_read_timeout 600
net_retry_count 10
net_write_timeout 500
set global net_buffer_length=8000, net_read_timeout=900, net_write_timeout=1000;
show global variables like 'net_%';
Variable_name Value
net_buffer_length 7168
net_read_timeout 900
net_retry_count 10
net_write_timeout 1000
show session variables like 'net_%';
Variable_name Value
net_buffer_length 16384
net_read_timeout 600
net_retry_count 10
net_write_timeout 500
set global net_buffer_length=1;
Warnings:
Warning 1292 Truncated incorrect net_buffer_length value: '1'
show global variables like 'net_buffer_length';
Variable_name Value
net_buffer_length 1024
set global net_buffer_length=2000000000;
Warnings:
Warning 1292 Truncated incorrect net_buffer_length value: '2000000000'
show global variables like 'net_buffer_length';
Variable_name Value
net_buffer_length 1048576
set session net_buffer_length=1024;
ERROR HY000: SESSION variable net_buffer_length is read-only. Use SET GLOBAL net_buffer_length to assign the value
set session max_allowed_packet=1024;
ERROR HY000: SESSION variable max_allowed_packet is read-only. Use SET GLOBAL max_allowed_packet to assign the value
set character set cp1251_koi8;
show variables like "character_set_client";
Variable_name Value
character_set_client cp1251
select @@timestamp>0;
@@timestamp>0
1
set @@rand_seed1=10000000,@@rand_seed2=1000000;
select ROUND(RAND(),5);
ROUND(RAND(),5)
0.02887
==+ Testing %alloc% system variables +==
==+ NOTE: These values *must* be a multiple of 1024 +==
==+ Other values will be rounded down to nearest multiple +==
==+ Show initial values +==
SHOW VARIABLES WHERE variable_name IN ('range_alloc_block_size',
'query_alloc_block_size', 'query_prealloc_size',
'transaction_alloc_block_size', 'transaction_prealloc_size');
Variable_name Value
query_alloc_block_size 8192
query_prealloc_size 8192
range_alloc_block_size 4096
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
==+ Manipulate variable values +=
Testing values that are multiples of 1024
set @@range_alloc_block_size=1024*15+1024;
set @@query_alloc_block_size=1024*15+1024*2;
set @@query_prealloc_size=1024*18-1024;
set @@transaction_alloc_block_size=1024*21-1024*1;
set @@transaction_prealloc_size=1024*21-2048;
==+ Check manipulated values ==+
SHOW VARIABLES WHERE variable_name IN ('range_alloc_block_size',
'query_alloc_block_size', 'query_prealloc_size',
'transaction_alloc_block_size', 'transaction_prealloc_size');
Variable_name Value
query_alloc_block_size 17408
query_prealloc_size 17408
range_alloc_block_size 16384
transaction_alloc_block_size 20480
transaction_prealloc_size 19456
==+ Manipulate variable values +==
Testing values that are not 1024 multiples
set @@range_alloc_block_size=1024*16+1023;
set @@query_alloc_block_size=1024*17+2;
set @@query_prealloc_size=1024*18-1023;
set @@transaction_alloc_block_size=1024*20-1;
set @@transaction_prealloc_size=1024*21-1;
select @@query_alloc_block_size;
@@query_alloc_block_size
17408
==+ Check manipulated values ==+
SHOW VARIABLES WHERE variable_name IN ('range_alloc_block_size',
'query_alloc_block_size', 'query_prealloc_size',
'transaction_alloc_block_size', 'transaction_prealloc_size');
Variable_name Value
query_alloc_block_size 17408
query_prealloc_size 17408
range_alloc_block_size 16384
transaction_alloc_block_size 19456
transaction_prealloc_size 20480
==+ Set values back to the default values +==
set @@range_alloc_block_size=default;
set @@query_alloc_block_size=default, @@query_prealloc_size=default;
set transaction_alloc_block_size=default, @@transaction_prealloc_size=default;
==+ Check the values now that they are reset +==
SHOW VARIABLES WHERE variable_name IN ('range_alloc_block_size',
'query_alloc_block_size', 'query_prealloc_size',
'transaction_alloc_block_size', 'transaction_prealloc_size');
Variable_name Value
query_alloc_block_size 8192
query_prealloc_size 8192
range_alloc_block_size 4096
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
SELECT @@version LIKE 'non-existent';
@@version LIKE 'non-existent'
0
SELECT @@version_compile_os LIKE 'non-existent';
@@version_compile_os LIKE 'non-existent'
0
set big_tables=OFFF;
ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
set big_tables="OFFF";
ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
set unknown_variable=1;
ERROR HY000: Unknown system variable 'unknown_variable'
set max_join_size="hello";
ERROR 42000: Incorrect argument type to variable 'max_join_size'
set storage_engine=UNKNOWN_TABLE_TYPE;
ERROR 42000: Unknown table engine 'UNKNOWN_TABLE_TYPE'
set storage_engine=MERGE, big_tables=2;
ERROR 42000: Variable 'big_tables' can't be set to the value of '2'
show local variables like 'storage_engine';
Variable_name Value
storage_engine MEMORY
set SESSION query_cache_size=10000;
ERROR HY000: Variable 'query_cache_size' is a GLOBAL variable and should be set with SET GLOBAL
set GLOBAL storage_engine=DEFAULT;
ERROR 42000: Variable 'storage_engine' doesn't have a default value
set character_set_client=UNKNOWN_CHARACTER_SET;
ERROR 42000: Unknown character set: 'UNKNOWN_CHARACTER_SET'
set collation_connection=UNKNOWN_COLLATION;
ERROR HY000: Unknown collation: 'UNKNOWN_COLLATION'
set character_set_client=NULL;
ERROR 42000: Variable 'character_set_client' can't be set to the value of 'NULL'
set collation_connection=NULL;
ERROR 42000: Variable 'collation_connection' can't be set to the value of 'NULL'
set global autocommit=1;
ERROR HY000: Variable 'autocommit' is a SESSION variable and can't be used with SET GLOBAL
select @@global.timestamp;
ERROR HY000: Variable 'timestamp' is a SESSION variable
set @@version='';
ERROR HY000: Variable 'version' is a read only variable
set @@concurrent_insert=1;
ERROR HY000: Variable 'concurrent_insert' is a GLOBAL variable and should be set with SET GLOBAL
set @@global.sql_auto_is_null=1;
ERROR HY000: Variable 'sql_auto_is_null' is a SESSION variable and can't be used with SET GLOBAL
select @@global.sql_auto_is_null;
ERROR HY000: Variable 'sql_auto_is_null' is a SESSION variable
set myisam_max_sort_file_size=100;
ERROR HY000: Variable 'myisam_max_sort_file_size' is a GLOBAL variable and should be set with SET GLOBAL
set @@SQL_WARNINGS=NULL;
ERROR 42000: Variable 'sql_warnings' can't be set to the value of 'NULL'
set autocommit=1;
set big_tables=1;
select @@autocommit, @@big_tables;
@@autocommit @@big_tables
1 1
set global binlog_cache_size=100;
Warnings:
Warning 1292 Truncated incorrect binlog_cache_size value: '100'
set bulk_insert_buffer_size=100;
set character set cp1251_koi8;
set character set default;
set @@global.concurrent_insert=1;
set global connect_timeout=100;
select @@delay_key_write;
@@delay_key_write
ON
set global delay_key_write="OFF";
select @@delay_key_write;
@@delay_key_write
OFF
set global delay_key_write=ALL;
select @@delay_key_write;
@@delay_key_write
ALL
set global delay_key_write=1;
select @@delay_key_write;
@@delay_key_write
ON
set global delayed_insert_limit=100;
set global delayed_insert_timeout=100;
set global delayed_queue_size=100;
set global flush=1;
set global flush_time=100;
set insert_id=1;
set interactive_timeout=100;
set join_buffer_size=100;
Warnings:
Warning 1292 Truncated incorrect join_buffer_size value: '100'
set last_insert_id=1;
set global local_infile=1;
set long_query_time=100;
set low_priority_updates=1;
set global max_allowed_packet=100;
Warnings:
Warning 1292 Truncated incorrect max_allowed_packet value: '100'
set global max_binlog_cache_size=100;
Warnings:
Warning 1292 Truncated incorrect max_binlog_cache_size value: '100'
set global max_binlog_size=100;
Warnings:
Warning 1292 Truncated incorrect max_binlog_size value: '100'
set global max_connect_errors=100;
set global max_connections=100;
set global max_delayed_threads=100;
set max_heap_table_size=100;
Warnings:
Warning 1292 Truncated incorrect max_heap_table_size value: '100'
set max_join_size=100;
set max_sort_length=100;
set max_tmp_tables=100;
set global max_user_connections=100;
select @@max_user_connections;
@@max_user_connections
100
set global max_write_lock_count=100;
set myisam_sort_buffer_size=100;
set global net_buffer_length=100;
Warnings:
Warning 1292 Truncated incorrect net_buffer_length value: '100'
set net_read_timeout=100;
set net_write_timeout=100;
set global query_cache_limit=100;
set global query_cache_size=100;
set global query_cache_type=demand;
set read_buffer_size=100;
Warnings:
Warning 1292 Truncated incorrect read_buffer_size value: '100'
set read_rnd_buffer_size=100;
Warnings:
Warning 1292 Truncated incorrect read_rnd_buffer_size value: '100'
set global rpl_recovery_rank=100;
set global server_id=100;
set global slow_launch_time=100;
set sort_buffer_size=100;
Warnings:
Warning 1292 Truncated incorrect sort_buffer_size value: '100'
set @@max_sp_recursion_depth=10;
select @@max_sp_recursion_depth;
@@max_sp_recursion_depth
10
set @@max_sp_recursion_depth=0;
select @@max_sp_recursion_depth;
@@max_sp_recursion_depth
0
set sql_auto_is_null=1;
select @@sql_auto_is_null;
@@sql_auto_is_null
1
set @@sql_auto_is_null=0;
select @@sql_auto_is_null;
@@sql_auto_is_null
0
set sql_big_selects=1;
set sql_big_tables=1;
set sql_buffer_result=1;
set sql_log_bin=1;
set sql_log_off=1;
set sql_log_update=1;
Warnings:
Note 1315 The update log is deprecated and replaced by the binary log; SET SQL_LOG_UPDATE has been ignored
set sql_low_priority_updates=1;
set sql_max_join_size=200;
select @@sql_max_join_size,@@max_join_size;
@@sql_max_join_size @@max_join_size
200 200
set sql_quote_show_create=1;
set sql_safe_updates=1;
set sql_select_limit=1;
set sql_select_limit=default;
set sql_warnings=1;
set global table_cache=100;
set storage_engine=myisam;
set global thread_cache_size=100;
set timestamp=1, timestamp=default;
set tmp_table_size=100;
Warnings:
Warning 1292 Truncated incorrect tmp_table_size value: '100'
set tx_isolation="READ-COMMITTED";
set wait_timeout=100;
set log_warnings=1;
select @@session.insert_id;
@@session.insert_id
1
set @save_insert_id=@@session.insert_id;
set session insert_id=20;
select @@session.insert_id;
@@session.insert_id
20
set session last_insert_id=100;
select @@session.insert_id;
@@session.insert_id
20
select @@session.last_insert_id;
@@session.last_insert_id
100
select @@session.insert_id;
@@session.insert_id
20
set @@session.insert_id=@save_insert_id;
select @@session.insert_id;
@@session.insert_id
1
create table t1 (a int not null auto_increment, primary key(a));
create table t2 (a int not null auto_increment, primary key(a));
insert into t1 values(null),(null),(null);
insert into t2 values(null),(null),(null);
set global key_buffer_size=100000;
select @@key_buffer_size;
@@key_buffer_size
98304
select * from t1 where a=2;
a
2
select * from t2 where a=3;
a
3
check table t1,t2;
Table Op Msg_type Msg_text
test.t1 check status OK
test.t2 check status OK
select max(a) +1, max(a) +2 into @xx,@yy from t1;
drop table t1,t2;
select @@xxxxxxxxxx;
ERROR HY000: Unknown system variable 'xxxxxxxxxx'
select 1;
1
1
select @@session.key_buffer_size;
ERROR HY000: Variable 'key_buffer_size' is a GLOBAL variable
set ft_boolean_syntax = @@init_connect;
ERROR HY000: Variable 'ft_boolean_syntax' is a GLOBAL variable and should be set with SET GLOBAL
set global ft_boolean_syntax = @@init_connect;
ERROR 42000: Variable 'ft_boolean_syntax' can't be set to the value of ''
set init_connect = NULL;
ERROR HY000: Variable 'init_connect' is a GLOBAL variable and should be set with SET GLOBAL
set global init_connect = NULL;
set ft_boolean_syntax = @@init_connect;
ERROR HY000: Variable 'ft_boolean_syntax' is a GLOBAL variable and should be set with SET GLOBAL
set global ft_boolean_syntax = @@init_connect;
ERROR 42000: Variable 'ft_boolean_syntax' can't be set to the value of ''
set global myisam_max_sort_file_size=4294967296;
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;
Warnings:
Warning 1292 Truncated incorrect table_cache value: '0'
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;
select @@have_innodb;
@@have_innodb
#
*** Various tests with LC_TIME_NAMES
*** LC_TIME_NAMES: testing case insensitivity
set @@lc_time_names='ru_ru';
select @@lc_time_names;
@@lc_time_names
ru_RU
*** LC_TIME_NAMES: testing with a user variable
set @lc='JA_JP';
set @@lc_time_names=@lc;
select @@lc_time_names;
@@lc_time_names
ja_JP
*** LC_TIME_NAMES: testing with string expressions
set lc_time_names=concat('de','_','DE');
select @@lc_time_names;
@@lc_time_names
de_DE
set lc_time_names=concat('de','+','DE');
ERROR HY000: Unknown locale: 'de+DE'
select @@lc_time_names;
@@lc_time_names
de_DE
LC_TIME_NAMES: testing with numeric expressions
set @@lc_time_names=1+2;
select @@lc_time_names;
@@lc_time_names
sv_SE
set @@lc_time_names=1/0;
ERROR 42000: Incorrect argument type to variable 'lc_time_names'
select @@lc_time_names;
@@lc_time_names
sv_SE
set lc_time_names=en_US;
LC_TIME_NAMES: testing NULL and a negative number:
set lc_time_names=NULL;
ERROR 42000: Variable 'lc_time_names' can't be set to the value of 'NULL'
set lc_time_names=-1;
ERROR HY000: Unknown locale: '-1'
select @@lc_time_names;
@@lc_time_names
en_US
LC_TIME_NAMES: testing locale with the last ID:
set lc_time_names=108;
select @@lc_time_names;
@@lc_time_names
zh_HK
LC_TIME_NAMES: testing a number beyond the valid ID range:
set lc_time_names=109;
ERROR HY000: Unknown locale: '109'
select @@lc_time_names;
@@lc_time_names
zh_HK
LC_TIME_NAMES: testing that 0 is en_US:
set lc_time_names=0;
select @@lc_time_names;
@@lc_time_names
en_US
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
en_US en_US
set @@global.lc_time_names=fr_FR;
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
fr_FR en_US
New connection
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
fr_FR fr_FR
set @@lc_time_names=ru_RU;
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
fr_FR ru_RU
Returnung to default connection
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
fr_FR en_US
set lc_time_names=default;
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
fr_FR fr_FR
set @@global.lc_time_names=default;
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
en_US fr_FR
set @@lc_time_names=default;
select @@global.lc_time_names, @@lc_time_names;
@@global.lc_time_names @@lc_time_names
en_US en_US
set @test = @@query_prealloc_size;
set @@query_prealloc_size = @test;
select @@query_prealloc_size = @test;
@@query_prealloc_size = @test
1
set global sql_mode=repeat('a',80);
ERROR 42000: Variable 'sql_mode' can't be set to the value of 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
End of 4.1 tests
create table t1 (a int);
select a into @x from t1;
Warnings:
Warning 1329 No data - zero rows fetched, selected, or processed
show warnings;
Level Code Message
Warning 1329 No data - zero rows fetched, selected, or processed
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 @@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
set character_set_filesystem=latin1;
select @@character_set_filesystem;
@@character_set_filesystem
latin1
set @@global.character_set_filesystem=latin2;
set character_set_filesystem=latin1;
select @@character_set_filesystem;
@@character_set_filesystem
latin1
set @@global.character_set_filesystem=latin2;
set character_set_filesystem=default;
select @@character_set_filesystem;
@@character_set_filesystem
latin2
set @@global.character_set_filesystem=default;
select @@global.character_set_filesystem;
@@global.character_set_filesystem
binary
set @old_sql_big_selects = @@sql_big_selects;
set @@sql_big_selects = 1;
show variables like 'sql_big_selects';
Variable_name Value
sql_big_selects ON
set @@sql_big_selects = @old_sql_big_selects;
set @@sql_notes = 0, @@sql_warnings = 0;
show variables like 'sql_notes';
Variable_name Value
sql_notes OFF
show variables like 'sql_warnings';
Variable_name Value
sql_warnings OFF
set @@sql_notes = 1, @@sql_warnings = 1;
show variables like 'sql_notes';
Variable_name Value
sql_notes ON
show variables like 'sql_warnings';
Variable_name Value
sql_warnings ON
select @@system_time_zone;
@@system_time_zone
#
select @@version, @@version_comment, @@version_compile_machine,
@@version_compile_os;
@@version @@version_comment @@version_compile_machine @@version_compile_os
# # # #
select @@basedir, @@datadir, @@tmpdir;
@@basedir @@datadir @@tmpdir
# # #
show variables like 'basedir';
Variable_name Value
basedir #
show variables like 'datadir';
Variable_name Value
datadir #
show variables like 'tmpdir';
Variable_name Value
tmpdir #
select @@ssl_ca, @@ssl_capath, @@ssl_cert, @@ssl_cipher, @@ssl_key;
@@ssl_ca @@ssl_capath @@ssl_cert @@ssl_cipher @@ssl_key
# # # # #
show variables like 'ssl%';
Variable_name Value
ssl_ca #
ssl_capath #
ssl_cert #
ssl_cipher #
ssl_key #
select @@log_queries_not_using_indexes;
@@log_queries_not_using_indexes
0
show variables like 'log_queries_not_using_indexes';
Variable_name Value
log_queries_not_using_indexes OFF
select @@"";
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 '""' at line 1
select @@&;
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 '&' at line 1
select @@@;
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 '@' at line 1
select @@hostname;
@@hostname
#
set @@hostname= "anothername";
ERROR HY000: Variable 'hostname' is a read only variable
show variables like 'hostname';
Variable_name Value
hostname #
SHOW VARIABLES LIKE 'log';
Variable_name Value
log ON
SELECT @@log;
@@log
1
SET GLOBAL log=0;
ERROR HY000: Variable 'log' is a read only variable
SHOW VARIABLES LIKE 'log_slow_queries';
Variable_name Value
log_slow_queries ON
SELECT @@log_slow_queries;
@@log_slow_queries
1
SET GLOBAL log_slow_queries=0;
ERROR HY000: Variable 'log_slow_queries' is a read only variable
End of 5.0 tests
set global binlog_cache_size =@my_binlog_cache_size;
set global connect_timeout =@my_connect_timeout;
set global delayed_insert_timeout =@my_delayed_insert_timeout;
set global delayed_queue_size =@my_delayed_queue_size;
set global flush =@my_flush;
set global flush_time =@my_flush_time;
set global key_buffer_size =@my_key_buffer_size;
set global max_binlog_cache_size =default;
set global max_binlog_size =@my_max_binlog_size;
set global max_connect_errors =@my_max_connect_errors;
set global max_delayed_threads =@my_max_delayed_threads;
set global max_heap_table_size =@my_max_heap_table_size;
set global max_insert_delayed_threads=@my_max_insert_delayed_threads;
set global max_join_size =@my_max_join_size;
set global max_user_connections =@my_max_user_connections;
set global max_write_lock_count =@my_max_write_lock_count;
set global myisam_data_pointer_size =@my_myisam_data_pointer_size;
set global net_buffer_length =@my_net_buffer_length;
set global net_write_timeout =@my_net_write_timeout;
set global net_read_timeout =@my_net_read_timeout;
set global query_cache_limit =@my_query_cache_limit;
set global query_cache_type =@my_query_cache_type;
set global rpl_recovery_rank =@my_rpl_recovery_rank;
set global server_id =@my_server_id;
set global slow_launch_time =@my_slow_launch_time;
set global storage_engine =@my_storage_engine;
set global thread_cache_size =@my_thread_cache_size;
#
# BUG#37408 - Compressed MyISAM files should not require/use mmap()
#
# Test 'myisam_mmap_size' option is not dynamic
SET @@myisam_mmap_size= 500M;
ERROR HY000: Variable 'myisam_mmap_size' is a read only variable
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