Answer / kiran kumar

PL/SQL allows for a special subprogram declaration called a
forward declaration. It consists of the subprogram
specification in the package body terminated by a semicolon.
You can use forward declarations to do the following:
? Define subprograms in logical or alphabetical order.
? Define mutually recursive subprograms.(both calling each
other).
? Group subprograms in a package

Example of forward Declaration:

CREATE OR REPLACE PACKAGE BODY forward_pack
IS
PROCEDURE calc_rating(. . .); -- forward declaration
PROCEDURE award_bonus(. . .)
IS -- subprograms defined
BEGIN -- in alphabetical order
calc_rating(. . .);
. . .
END;

PROCEDURE calc_rating(. . .)
IS
BEGIN
. . .
END;

END forward_pack;

Answer / palaniraman balasubramanian

Special sub program unit declaration called forward
declaration, Consider below the example

In this pacakage, the first program unit is calling the
calc_rating but calc_rating is defined last in the package;
if we are not declared the fwd declaration then it will
raise the error While compiling this package. Package
compilation always happens top to bottom. For resolving
this compilation issue, you should declare the fwd
declaration.

CREATE OR REPLACE PACKAGE BODY forward_pack
IS
PROCEDURE calc_rating(. . .); -- forward
declaration
PROCEDURE award_bonus(. . .)
IS -- subprograms
defined
BEGIN -- in alphabetical
order
calc_rating(. . .);
. . .
END;

PROCEDURE calc_rating(. . .)
IS
BEGIN
. . .
END;

END forward_pack;

Answer / reddy

we have to declare an attribute before using in the program
called forward declaration

Answer / avinash

It is required in case of private members only not public

Answer / pradhyumn sharma

Forward Declaration is that we must declare the procedures
or functions before using them. If we dont declare then ti
raise error.

Answer / ranga

if you want define the procedure in existing local procedure
on that time you will define the procedures,along with the
parameters is called forward declaration.

How to attach the multiple templates in XML Pub Report?

2 Answers   Intelligroup, KPIT,

What is workflow?Explain with a example?

2 Answers   Oracle,

what are the prerequisites for costing transactions?

0 Answers   Scan Steel,

oracle apps architecture

1 Answers   TCS,

how to avoid duplicate data while uploading data from flatfile to staging table? some validations

5 Answers   Amdocs,

tell me the scenarios of between pages in reports

5 Answers  

What is Value Set?

2 Answers   Accenture,

Do you know where we can check the status of po?

0 Answers  

How can you achieve loose coupling in soa framework?

0 Answers  

what is the difference between varchar and varchar(2)?

4 Answers  

how many layout sections are tehre in layout editor?

1 Answers  

How does accounting occured in Expense Reporting?

1 Answers   Sapient,