SET @start_global_value = @@global.sql_select_limit;
SELECT @start_global_value;
@start_global_value
18446744073709551615
select @@global.sql_select_limit;
@@global.sql_select_limit
18446744073709551615
select @@session.sql_select_limit;
@@session.sql_select_limit
18446744073709551615
show global variables like 'sql_select_limit';
Variable_name	Value
sql_select_limit	18446744073709551615
show session variables like 'sql_select_limit';
Variable_name	Value
sql_select_limit	18446744073709551615
select * from information_schema.global_variables where variable_name='sql_select_limit';
VARIABLE_NAME	VARIABLE_VALUE
SQL_SELECT_LIMIT	18446744073709551615
select * from information_schema.session_variables where variable_name='sql_select_limit';
VARIABLE_NAME	VARIABLE_VALUE
SQL_SELECT_LIMIT	18446744073709551615
set global sql_select_limit=10;
set session sql_select_limit=20;
select @@global.sql_select_limit;
@@global.sql_select_limit
10
select @@session.sql_select_limit;
@@session.sql_select_limit
20
show global variables like 'sql_select_limit';
Variable_name	Value
sql_select_limit	10
show session variables like 'sql_select_limit';
Variable_name	Value
sql_select_limit	20
select * from information_schema.global_variables where variable_name='sql_select_limit';
VARIABLE_NAME	VARIABLE_VALUE
SQL_SELECT_LIMIT	10
select * from information_schema.session_variables where variable_name='sql_select_limit';
VARIABLE_NAME	VARIABLE_VALUE
SQL_SELECT_LIMIT	20
set global sql_select_limit=1.1;
ERROR 42000: Incorrect argument type to variable 'sql_select_limit'
set global sql_select_limit=1e1;
ERROR 42000: Incorrect argument type to variable 'sql_select_limit'
set global sql_select_limit="foo";
ERROR 42000: Incorrect argument type to variable 'sql_select_limit'
SET @@global.sql_select_limit = @start_global_value;
SELECT @@global.sql_select_limit;
@@global.sql_select_limit
18446744073709551615
