path: root/mysql-test/t/variables.test

#
# test variables
#
--disable_warnings
drop table if exists t1,t2;
--enable_warnings

# case insensitivity tests (new in 5.0)
set @`test`=1;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
set @TEST=2;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
set @"tEST"=3;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
set @`TeST`=4;
select @test, @`test`, @TEST, @`TEST`, @"teSt";
select @`teST`:=5;
select @test, @`test`, @TEST, @`TEST`, @"teSt";

set @select=2,@t5=1.23456;
select @`select`,@not_used;
set @test_int=10,@test_double=1e-10,@test_string="abcdeghi",@test_string2="abcdefghij",@select=NULL;
--replace_result e-0 e- e+0 e+
select @test_int,@test_double,@test_string,@test_string2,@select;
set @test_int="hello",@test_double="hello",@test_string="hello",@test_string2="hello";
select @test_int,@test_double,@test_string,@test_string2;
set @test_int="hellohello",@test_double="hellohello",@test_string="hellohello",@test_string2="hellohello";
select @test_int,@test_double,@test_string,@test_string2;
set @test_int=null,@test_double=null,@test_string=null,@test_string2=null;
select @test_int,@test_double,@test_string,@test_string2;
select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
explain extended select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
select @t5;

#
# Test problem with WHERE and variables
#

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;
SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid;
SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid OR c_id=666;
ALTER TABLE t1 DROP PRIMARY KEY;
select * from t1 where c_id=@min_cid OR c_id=@max_cid;
drop table t1;

#
# Test system variables
#

set max_join_size=100;
show variables like 'max_join_size';
--replace_result 18446744073709551615 HA_POS_ERROR 4294967295 HA_POS_ERROR
show global variables like 'max_join_size';
set GLOBAL max_join_size=2000;
show global variables like 'max_join_size';
set max_join_size=DEFAULT;
--replace_result 18446744073709551615 HA_POS_ERROR 4294967295 HA_POS_ERROR
show variables like 'max_join_size';
set GLOBAL max_join_size=DEFAULT;
--replace_result 18446744073709551615 HA_POS_ERROR 4294967295 HA_POS_ERROR
show global variables like 'max_join_size';
set @@max_join_size=1000, @@global.max_join_size=2000;
select @@local.max_join_size, @@global.max_join_size;
select @@identity,  length(@@version)>0;
select @@VERSION=version();
select last_insert_id(345);
explain extended select last_insert_id(345);
select @@IDENTITY,last_insert_id(), @@identity;
explain extended select @@IDENTITY,last_insert_id(), @@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';
set global concurrent_insert=1;
show variables like 'concurrent_insert';
set global concurrent_insert=0;
show variables like 'concurrent_insert';
set global concurrent_insert=DEFAULT;
select @@concurrent_insert;

set global timed_mutexes=ON;
show variables like 'timed_mutexes';
set global timed_mutexes=0;
show variables like 'timed_mutexes';

set storage_engine=MYISAM, storage_engine="HEAP", global storage_engine="MERGE";
show local variables like 'storage_engine';
show global variables like 'storage_engine';
set GLOBAL query_cache_size=100000;

set GLOBAL myisam_max_sort_file_size=2000000;
show global variables like 'myisam_max_sort_file_size';
set GLOBAL myisam_max_sort_file_size=default;
--replace_result 2147483647 FILE_SIZE 9223372036854775807 FILE_SIZE
show variables like 'myisam_max_sort_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_buffer_length=2048, net_write_timeout=500, net_read_timeout=600;
show global variables like 'net_%';
show session variables like 'net_%';
set session net_buffer_length=8000, global net_read_timeout=900, net_write_timeout=1000;
show global variables like 'net_%';
show session variables like 'net_%';
set net_buffer_length=1;
show variables like 'net_buffer_length';
set net_buffer_length=2000000000;
show variables like 'net_buffer_length';

set character set cp1251_koi8;
show variables like "character_set_client";
select @@timestamp>0;

set @@rand_seed1=10000000,@@rand_seed2=1000000;
select ROUND(RAND(),5);

show variables like '%alloc%';
set @@range_alloc_block_size=1024*16;
set @@query_alloc_block_size=1024*17+2;
set @@query_prealloc_size=1024*18;
set @@transaction_alloc_block_size=1024*20-1;
set @@transaction_prealloc_size=1024*21-1;
select @@query_alloc_block_size;
show variables like '%alloc%';
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;
show variables like '%alloc%';

#
# Bug #10904 Illegal mix of collations between
# a system variable and a constant
#
SELECT @@version LIKE 'non-existent';
SELECT @@version_compile_os LIKE 'non-existent';

# The following should give errors

--error 1231
set big_tables=OFFF;
--error 1231
set big_tables="OFFF";
--error 1193
set unknown_variable=1;
--error 1232
set max_join_size="hello";
--error 1286
set storage_engine=UNKNOWN_TABLE_TYPE;
--error 1231
set storage_engine=MERGE, big_tables=2;
show local variables like 'storage_engine';
--error 1229
set SESSION query_cache_size=10000;
--error 1230
set GLOBAL storage_engine=DEFAULT;
--error 1115
set character_set_client=UNKNOWN_CHARACTER_SET;
--error 1273
set collation_connection=UNKNOWN_COLLATION;
--error 1231
set character_set_client=NULL;
--error 1231
set collation_connection=NULL;
--error 1228
set global autocommit=1;
--error 1238
select @@global.timestamp;
--error 1193
set @@version='';
--error 1229
set @@concurrent_insert=1;
--error 1228
set @@global.sql_auto_is_null=1;
--error 1238
select @@global.sql_auto_is_null;
--error 1229
set myisam_max_sort_file_size=100;
--error 1231
set @@SQL_WARNINGS=NULL;

# Test setting all variables

set autocommit=1;
set big_tables=1;
select @@autocommit, @@big_tables;
set global binlog_cache_size=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;
set global delay_key_write="OFF";
select @@delay_key_write;
set global delay_key_write=ALL;
select @@delay_key_write;
set global delay_key_write=1;
select @@delay_key_write;
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;
set last_insert_id=1;
set global local_infile=1;
set long_query_time=100;
set low_priority_updates=1;
set max_allowed_packet=100;
set global max_binlog_cache_size=100;
set global max_binlog_size=100;
set global max_connect_errors=100;
set global max_connections=100;
set global max_delayed_threads=100;
set max_heap_table_size=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;
set global max_write_lock_count=100;
set myisam_sort_buffer_size=100;
set net_buffer_length=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;
set read_rnd_buffer_size=100;
set global rpl_recovery_rank=100;
set global server_id=100;
set global slow_launch_time=100;
set sort_buffer_size=100;
set @@max_sp_recursion_depth=10;
select @@max_sp_recursion_depth;
set @@max_sp_recursion_depth=0;
select @@max_sp_recursion_depth;
set sql_auto_is_null=1;
select @@sql_auto_is_null;
set @@sql_auto_is_null=0;
select @@sql_auto_is_null;
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;
set sql_low_priority_updates=1;
set sql_max_join_size=200;
select @@sql_max_join_size,@@max_join_size;
set sql_quote_show_create=1;
set sql_safe_updates=1;
set sql_select_limit=1;
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;
set tx_isolation="READ-COMMITTED";
set wait_timeout=100;
set log_warnings=1;

#
# key buffer
#

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;
select * from t1 where a=2;
select * from t2 where a=3;
check table t1,t2;
select max(a) +1, max(a) +2 into @xx,@yy from t1;
drop table t1,t2;

#
# error conditions
#

--error 1193
select @@xxxxxxxxxx;
select 1;

--error 1238
select @@session.key_buffer_size;

--error 1229
set ft_boolean_syntax = @@init_connect;
--error 1231
set global ft_boolean_syntax = @@init_connect;
--error 1229
set init_connect = NULL;
set global init_connect = NULL;
--error 1229
set ft_boolean_syntax = @@init_connect;
--error 1231
set global ft_boolean_syntax = @@init_connect;

# Bug#3754 SET GLOBAL myisam_max_sort_file_size doesn't work as
# expected: check that there is no overflow when 64-bit unsigned
# variables are set

set global myisam_max_sort_file_size=4294967296;
--replace_result 4294967296 MAX_FILE_SIZE 2146435072 MAX_FILE_SIZE
show global variables like 'myisam_max_sort_file_size';
set global myisam_max_sort_file_size=default;

#
# swap
#
select @@global.max_user_connections,@@local.max_join_size;
set @svc=@@global.max_user_connections, @svj=@@local.max_join_size;
select @@global.max_user_connections,@@local.max_join_size;
set @@global.max_user_connections=111,@@local.max_join_size=222;
select @@global.max_user_connections,@@local.max_join_size;
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;
set @@global.max_user_connections=@svc, @@local.max_join_size=@svj;
select @@global.max_user_connections,@@local.max_join_size;
set @a=1, @b=2;
set @a=@b, @b=@a;
select @a, @b;

#
# Bug#2586:Disallow global/session/local as structured var. instance names
#
--error 1064
set @@global.global.key_buffer_size= 1;
--error 1064
set GLOBAL global.key_buffer_size= 1;
--error 1064
SELECT @@global.global.key_buffer_size;
--error 1064
SELECT @@global.session.key_buffer_size;
--error 1064
SELECT @@global.local.key_buffer_size;

# BUG#5135: cannot turn on log_warnings with SET in 4.1 (and 4.0)
set @tstlw = @@log_warnings;
show global variables like 'log_warnings';
set global log_warnings = 0;
show global variables like 'log_warnings';
set global log_warnings = 42;
show global variables like 'log_warnings';
set global log_warnings = @tstlw;
show global variables like 'log_warnings';

#
# BUG#4788 show create table provides incorrect statement
#
# What default width have numeric types?
create table t1 (
  c1 tinyint,
  c2 smallint,
  c3 mediumint,
  c4 int,
  c5 bigint);
show create table t1;
drop table t1;
#
# What types and widths have variables?
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;
drop table t1;


#
# Bug #6993: myisam_data_pointer_size
# Wrong bug report, data pointer size must be restricted to 7,
# setting to 8 will not work on all computers, myisamchk and
# the server may see a wrong value, such as 0 or negative number
# if 8 bytes is set.
#

SET GLOBAL MYISAM_DATA_POINTER_SIZE= 7;
SHOW VARIABLES LIKE 'MYISAM_DATA_POINTER_SIZE';

#
# Bug #6958: negative arguments to integer options wrap around
#

SET GLOBAL table_cache=-1;
SHOW VARIABLES LIKE 'table_cache';
SET GLOBAL table_cache=DEFAULT;

#
# Bugs12363: character_set_results is nullable,
# but value_ptr returns string "NULL"
#
set character_set_results=NULL;
select ifnull(@@character_set_results,"really null");
set names latin1;


#
# Bug #9613: @@have_innodb
#

--replace_column 1 #
select @@have_innodb;

#
# Bug #13334: query_prealloc_size default less than minimum
#
set @test = @@query_prealloc_size;
set @@query_prealloc_size = @test;
select @@query_prealloc_size = @test;

# End of 4.1 tests

#
# Bug#6282 Packet error with SELECT INTO
# 

create table t1 (a int);
select a into @x from t1;
show warnings;
drop table t1;

#
# Bug #10339: read only variables.
#

--error 1238
set @@warning_count=1;
--error 1238
set @@global.error_count=1;

#
# Bug #10351: Setting ulong variable to > MAX_ULONG fails on 32-bit platform
#

set @@max_heap_table_size= 4294967296;
select @@max_heap_table_size > 0;
set global max_heap_table_size= 4294967296;
select @@max_heap_table_size > 0;
set @@max_heap_table_size= 4294967296;
select @@max_heap_table_size > 0;

#
# Bug #11775 Variable character_set_system does not exist (sometimes)
#
select @@character_set_system;
--error 1238
set global character_set_system = latin1;
--error 1238
set @@global.version_compile_os='234';

# End of 5.0 tests