StoredProc WHERE condition based on parameters

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September 8th, 2009, 04:48 AM

highlysceptical

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Join Date: Sep 2009

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StoredProc WHERE condition based on parameters

This seems a very naive question, but is it possible to construct different WHERE conditions based on parameters passed to a storedproc, and then to use the construced WHERE condition in the SELECT statement. For example

IF (MyParam = 'T') THEN
MyWhereCondition = 'X = 1'
ELSE
MyWhereCondition = 'X = 2'

SELECT * FROM MyTable
WHERE MyWhereCondition

I would have thought this ought to be really simple, but I cannot work out how to do it. So any help greatly appreciated!

September 8th, 2009, 07:49 AM

biju_ps

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Join Date: Aug 2008

Posts: 59

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Use EXECUTE STATEMENT

Use ' EXECUTE STATEMENT'

Example :

SQL Code:

Original - SQL Code
CREATE OR ALTER PROCEDURE TEST ( EMPNO INTEGER) RETURNS ( FNAME VARCHAR(30)) AS DECLARE VARIABLE SQL VARCHAR(200); begin sql= 'select First_Name FROM Employee Where EMP_NO =' \|\| :EMPNO ; EXECUTE STATEMENT :sql into :fname ; suspend;

 
CREATE OR ALTER PROCEDURE TEST (
    EMPNO INTEGER)
RETURNS (
    FNAME VARCHAR(30))
AS
DECLARE VARIABLE SQL VARCHAR(200);
BEGIN
  sql=
  'select First_Name FROM Employee Where EMP_NO =' || :EMPNO ;
 
  EXECUTE STATEMENT :sql INTO :fname ;
  suspend;

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