layout: global title: DROP TEMPORARY VARIABLE displayTitle: DROP TEMPORARY VARIABLE license: | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
The DROP TEMPORARY VARIABLE
statement drops a temporary variable. An exception will be thrown if the variable does not exist.
DROP TEMPORARY VARIABLE [ IF EXISTS ] variable_name
variable_name
Specifies the name of an existing variable. The function name may be optionally qualified with a system.session
or session
.
Syntax: [ system. [ session.] ] variable_name
IF EXISTS
If specified, no exception is thrown when the variable does not exist.
-- Create a temporary variable var1 DECLARE VARIABLE var1 INT; -- Drop temporary variable DROP TEMPORARY VARIABLE var1; -- Try to drop temporary variable which is not present DROP TEMPORARY VARIABLE var1; Error: VARIABLE_NOT_FOUND The variable `system`.`session`.`var1` cannot be found. -- Drop temporart variable if it exists DROP TEMPORARY VARIABLE IF EXISTS var1;