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  3. SUPPRESSES_WARNING_6009 Pragma

14.67 SUPPRESSES_WARNING_6009 Pragma

The SUPPRESSES_WARNING_6009 pragma marks a subroutine to indicate that the PLW-06009 warning is suppressed at its call site in an OTHERS exception handler. The marked subroutine has the same effect as a RAISE statement and suppresses the PLW-06009 compiler warning.

The OTHERS exception handler does not issue the compiler warning PLW-06009 if an exception is raised explicitly using either a RAISE statement or the RAISE_APPLICATION_ERROR procedure as the last statement. Similarly, a call to a subroutine marked with the SUPPRESSES_WARNING_6009 pragma, from the OTHERS exception handler, does not issue the PLW-06009 warning.

The SUPPRESSES_WARNING_6009 pragma can appear in the following SQL statements :

Topics

Syntax

suppresses_warning_6009_pragma ::=

Description of suppress_warning_pragma.eps follows
Description of the illustration suppress_warning_pragma.eps

Semantics

suppresses_warning_6009_pragma

The SUPPRESSES_WARNING_6009 pragma applies to standalone subprograms, packaged subprograms and to the methods in an Abstract Data Type definition.

For a standalone subprogram, the SUPPRESSES_WARNING_6009 pragma may appear as the first item in the declaration block of a subprogram definition, immediately after the keyword IS or AS.

In a package specification, a package body and a type specification, the SUPPRESSES_WARNING_6009 pragma must appear immediately after the subprogram declaration.

If the subprogram has separate declaration and definition, the SUPPRESSES_WARNING_6009 pragma may be applied either to the subprogram declaration, or to the subprogram definition, or to both.

For overloaded subprograms, SUPPRESSES_WARNING_6009 pragma only applies to the marked overload.

When the SUPPRESSES_WARNING_6009 pragma is applied to a subprogram in a package specification, the subprogram is marked for use both in the package body and in the invokers of the package.

When the SUPPRESSES_WARNING_6009 pragma is applied to a subprogram in the definition of a package body, the subprogram is marked for use only in the package body even if the subprogram is declared in the package specification.

The SUPPRESSES_WARNING_6009 pragma applied to a subprogram in a base type object, is inherited in a derived type object unless there is an override without the pragma in the derived type object.

The SUPPRESSES_WARNING_6009 pragma may be terminated with a "," when applied to a subprogram in a type specification. In all other contexts, the pragma is terminated by ";".

The SUPPRESSES_WARNING_6009 pragma on the subprogram provides a hint to the compiler to suppress the warning PLW-06009 at its call site.

pls_identifier

Identifier of the PL/SQL element to which the pragma is applied.

The identifier is a parameter to the SUPPRESSES_WARNING_6009 pragma that must name the subprogram to which it is applied.

If the identifier in the SUPPRESSES_WARNING_6009 does not identify a subroutine in the declaration section, the pragma has no effect.

Examples

Example 14-41 Enabling the PLW-6009 Warning

This example shows how to set the PLSQL_WARNINGS parameter to enable the PLW-6009 warning in a session for demonstration purpose. 
ALTER SESSION SET PLSQL_WARNINGS='ENABLE:(6009)';

Example 14-42 SUPPRESSES_WARNING_6009 Pragma in a Procedure

This example shows a standalone procedure p1 marked with the SUPPRESSES_WARNING_6009 pragma. The p1 procedure is invoked from an OTHERS exception handler in procedure p2, which does not raise an exception explicitly. 
CREATE PROCEDURE p1
AUTHID DEFINER
IS
    PRAGMA SUPPRESSES_WARNING_6009(p1);
BEGIN
    RAISE_APPLICATION_ERROR(-20000, 'Unexpected error raised');
END;
/
The PLW-06009 warning is not issued when compiling procedure p2. 
CREATE PROCEDURE p2
AUTHID DEFINER
IS
BEGIN
  DBMS_OUTPUT.PUT_LINE('In procedure p2');
EXCEPTION
  WHEN OTHERS THEN
    p1;                
END p2;
/

Example 14-43 SUPPRESSES_WARNING_6009 Pragma in a Function

This example shows a standalone function f1 marked with the SUPPRESSES_WARNING_6009 pragma. This function is invoked from an OTHERS exception handler in function f2, which does not explicitly have a RAISE statement. 
CREATE FUNCTION f1(id NUMBER) RETURN NUMBER
AUTHID DEFINER
IS
  PRAGMA SUPPRESSES_WARNING_6009(f1);
  x NUMBER;
BEGIN
  x := id + 1;
RETURN x;
END;
/
The PLW-06009 warning is not issued when compiling function f2. 
CREATE FUNCTION f2(numval NUMBER) RETURN NUMBER
AUTHID DEFINER
IS
  i NUMBER;
BEGIN
  i := numval + 1;
  RETURN i;
EXCEPTION
  WHEN OTHERS THEN
    RETURN f1(i);
END;
/

Example 14-44 SUPPRESSES_WARNING_6009 Pragma in an Overloaded Subprogram in a Package Specification

This example shows an overloaded procedure p1, declared in a package specification. Only the second overload of p1 is marked with the SUPPRESSES_WARNING_6009 pragma. This marked overload is invoked from the OTHERS exception handler in procedure p6, which does not have an explicit RAISE statement. 

CREATE PACKAGE pk1 IS
   PROCEDURE p1(x NUMBER);
   PROCEDURE p1;
   PRAGMA SUPPRESSES_WARNING_6009(p1);
END;
/

CREATE OR REPLACE PACKAGE BODY pk1 IS
   PROCEDURE p1(x NUMBER) IS
   BEGIN
      DBMS_OUTPUT.PUT_LINE('In the first overload');
   END;

   PROCEDURE p1 IS
   BEGIN
      DBMS_OUTPUT.PUT_LINE('In the second overload');
      RAISE_APPLICATION_ERROR(-20000, 'Unexpected error');
   END;
END;
/
The procedure p6 invokes the p1 second overloaded procedure. The compiler does not issue a PLW-06009 warning when compiling procedure p6.

CREATE OR REPLACE PROCEDURE p6 AUTHID DEFINER IS
j NUMBER := 5;
BEGIN
   j := j + 2;
EXCEPTION
   WHEN OTHERS THEN
       pk1.p1;
END;
/

Example 14-45 SUPPRESSES_WARNING_6009 Pragma in a Forward Declaration in a Package Body

This example shows a forward declaration subprogram marked with the SUPPRESSES_WARNING_6009 pragma in a package body. This marked procedure pn is invoked from the OTHERS exception handler in procedure p5, which has no RAISE statement. 

CREATE OR REPLACE PACKAGE pk2 IS
   PROCEDURE p5;
END;
/
The compiler does not issue a PLW-06009 warning when creating the package body.

CREATE OR REPLACE PACKAGE BODY pk2 IS
   PROCEDURE pn; /* Forward declaration */
   PRAGMA SUPPRESSES_WARNING_6009(pn);

   PROCEDURE p5 IS
   BEGIN
      DBMS_OUTPUT.PUT_LINE('Computing');
   EXCEPTION 
      WHEN OTHERS THEN
         pn;
   END;

   PROCEDURE pn IS
   BEGIN
      RAISE_APPLICATION_ERROR(-20000, 'Unexpected error');
   END;
END;
/

Example 14-46 SUPPRESSES_WARNING_6009 Pragma in Object Type Methods

This example shows the SUPPRESSES_WARNING_6009 pragma applied to a member method declared in the newid Abstract Data Type (ADT) definition. The marked procedure log_error is invoked from the OTHERS exception handler in the type body, which does not have a RAISE statement. 
CREATE OR REPLACE TYPE newid AUTHID DEFINER
AS OBJECT(
  ID1 NUMBER,
  MEMBER PROCEDURE incr,
  MEMBER PROCEDURE log_error,
  PRAGMA SUPPRESSES_WARNING_6009(log_error)
);
/
The compiler does not issue the PLW-06009 warning when compiling the type body.
CREATE OR REPLACE TYPE BODY newid
AS
  MEMBER PROCEDURE incr
  IS
  BEGIN
     DBMS_OUTPUT.PUT_LINE('Computing value');
  EXCEPTION
     WHEN OTHERS THEN
        log_error;
  END;

  MEMBER PROCEDURE log_error
  IS
  BEGIN
    RAISE_APPLICATION_ERROR(-20000, 'Unexpected error');
  END;
END;
/

Related Topics