This is the documentation for Cloudera Impala 1.4.1.
Documentation for other versions is available at Cloudera.com.

DROP FUNCTION Statement

Removes a user-defined function (UDF), so that it is not available for execution during Impala SELECT or INSERT operations.

Syntax:

DROP [AGGREGATE] FUNCTION [IF EXISTS] [db_name.]function_name(type[, type...])

Statement type: DDL

Usage notes:

Because the same function name could be overloaded with different argument signatures, you specify the argument types to identify the exact function to drop.

Cancellation: Cannot be cancelled.

User-Defined Functions (UDFs), CREATE FUNCTION Statement