DROP FUNCTION
Applies to: Databricks SQL Databricks Runtime
Drops a temporary or permanent user-defined function (UDF). To drop a function you must be its owner, or the owner of the schema, catalog, or metastore the function resides in.
Syntax
DROP [ TEMPORARY ] FUNCTION [ IF EXISTS ] function_name
Parameters
-
The name of an existing function. The function name may be optionally qualified with a schema name.
TEMPORARY
Used to delete a
TEMPORARY
function.IF EXISTS
If specified, no exception is thrown when the function does not exist.
Examples
-- Create a permanent function `hello`
> CREATE FUNCTION hello() RETURNS STRING RETURN 'Hello World!';
-- Create a temporary function `hello`
> CREATE TEMPORARY FUNCTION hello() RETURNS STRING RETURN 'Good morning!';
-- List user functions
> SHOW USER FUNCTIONS;
default.hello
hello
-- Drop a permanent function
> DROP FUNCTION hello;
-- Try to drop a permanent function which is not present
> DROP FUNCTION hello;
Function 'default.hello' not found in schema 'default'
-- List the functions after dropping, it should list only temporary function
> SHOW USER FUNCTIONS;
hello
-- Drop a temporary function if exists
> DROP TEMPORARY FUNCTION IF EXISTS hello;