DROP FUNCTION Statement (drop_function_statement)
The DROP-FUNCTION
statement (drop_function_statement
)
deletes a database function.
SQL Tutorial, Database Functions
If a schema is not specified in the database function name, the current schema is implicitly assumed.
The current user must be the owner of the database function or
have the DROPIN
privilege for the schema to
which the database function is assigned.
The metadata of the database function is dropped.
To drop a database function that was created with the property PUBLIC
,
you have to use the DROP PUBLIC FUNCTION
statement
for this function.