select @@global.last_insert_id; ERROR HY000: Variable 'last_insert_id' is a SESSION variable select @@session.last_insert_id; @@session.last_insert_id 0 show global variables like 'last_insert_id'; Variable_name Value show session variables like 'last_insert_id'; Variable_name Value last_insert_id 0 select * from information_schema.global_variables where variable_name='last_insert_id'; VARIABLE_NAME VARIABLE_VALUE select * from information_schema.session_variables where variable_name='last_insert_id'; VARIABLE_NAME VARIABLE_VALUE LAST_INSERT_ID 0 set global last_insert_id=99; ERROR HY000: Variable 'last_insert_id' is a SESSION variable and can't be used with SET GLOBAL set session last_insert_id=42; select @@global.last_insert_id; ERROR HY000: Variable 'last_insert_id' is a SESSION variable select @@session.last_insert_id; @@session.last_insert_id 42 show global variables like 'last_insert_id'; Variable_name Value show session variables like 'last_insert_id'; Variable_name Value last_insert_id 42 select * from information_schema.global_variables where variable_name='last_insert_id'; VARIABLE_NAME VARIABLE_VALUE select * from information_schema.session_variables where variable_name='last_insert_id'; VARIABLE_NAME VARIABLE_VALUE LAST_INSERT_ID 42 set session last_insert_id=1.1; ERROR 42000: Incorrect argument type to variable 'last_insert_id' set session last_insert_id=1e1; ERROR 42000: Incorrect argument type to variable 'last_insert_id' set session last_insert_id="foo"; ERROR 42000: Incorrect argument type to variable 'last_insert_id'