Test the Boolean function

Dear all

How do I test a Boolean function that returns true or false.

Hello

Write a Wrapper function , in other words, another function that surrounds your first function that you can call from SQL and call him.

CREATE OR REPLACE FUNCTION check_mobile_varchar2 (p_mobile IN VARCHAR2)
RETURN  VARCHAR2
IS
    return_string   VARCHAR2 (5) := 'FALSE';
BEGIN
    IF  check_mobile (p_mobile)
    THEN
        return_string := 'TRUE';
    END IF;

    RETURN  return_string;
END  check_mobile_varchar2
;
/

To test:

SELECT  txt
,       CHECK_MOBILE_VARCHAR2 (txt)    AS check_mobile
FROM    table_x
;

This assumes that you want a function that returns a BOOLEAN value and therefore cannot be used in SQL. Many people simply write functions that return to 'TRUE' or 'FALSE' (or ' t "or"F", 1 or 0) in the first place.
If check_mobile is in a package, check_mobile_varchar2 must be in the same package.

Published by: Frank Kulash, March 13, 2011 11:46
Added RETURN startement.

Tags: Database

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