drop function(7)
NAME
DROP FUNCTION - remove a function
SYNOPSIS
DROP FUNCTION name ( [ [ argmode ] [ argname ] argtype [, ...] ] ) [ CASCADE | RESTRICT ]
DESCRIPTION
DROP FUNCTION removes the definition of an existing function. To execute this command the user must be the owner of the function. The argument types to the function must be specified, since several different
functions may exist with the same name and different argument lists.
PARAMETERS
name The name (optionally schema-qualified) of an existing function.
- argmode
- The mode of an argument: either IN, OUT, or INOUT. If omitted, the default is IN. Note that DROP FUNCTION does not actually pay any attention to OUT arguments, since only the input arguments are needed to determine the function's identity. So it is sufficient to list the IN and INOUT arguments.
- argname
- The name of an argument. Note that DROP FUNCTION does not actually pay any attention to argument names, since only the argument data types are needed to determine the function's identity.
- argtype
- The data type(s) of the function's arguments (optionally schemaqualified), if any.
- CASCADE
- Automatically drop objects that depend on the function (such as operators or triggers).
- RESTRICT
- Refuse to drop the function if any objects depend on it. This is the default.
EXAMPLES
This command removes the square root function:
DROP FUNCTION sqrt(integer);
COMPATIBILITY
A DROP FUNCTION statement is defined in the SQL standard, but it is not
compatible with this command.
SEE ALSO
- CREATE FUNCTION [create_function(7)], ALTER FUNCTION [alter_function(l)]