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Procedure Declaration and Definition

A procedure is a subprogram that performs a specific action. A procedure invocation (or call) is a statement.

Before invoking a procedure, you must declare and define it. You can either declare it first (with procedure_declaration) and then define it later in the same block, subprogram, or package (with procedure_definition) or declare and define it at the same time (with procedure_definition).

A procedure declaration is also called a procedure specification or procedure spec.

Note:

This topic applies to nested procedures. For information about standalone procedures, see "CREATE PROCEDURE Statement". For information about package procedures, see "CREATE PACKAGE Statement".

Topics

Semantics

procedure_declaration

Declares a procedure, but does not define it. The definition must appear later in the same block, subprogram, or package as the declaration.

procedure_heading

procedure

Name of the procedure that you are declaring or defining.

procedure_definition

Either defines a procedure that was declared earlier or both declares and defines a procedure.

declare_section

Declares items that are local to the procedure, can be referenced in body, and cease to exist when the procedure completes execution.

body

Required executable part and optional exception-handling part of the procedure.

call_spec, EXTERNAL

See"call_spec" and "EXTERNAL".

Restriction on call_spec, EXTERNAL These clauses can appear only in a package specification or package body.