Calling Stored Procedure with Specific Date?

Hi all,

I want to call my stored procedure with the date I select, but the date is not defined as a parameter. How can it be done?

Thanks.

CREATE PROCEDURE "_SYS_BIC"."ZBW_SP_LOAD_SD_IS04_DELTA"
LANGUAGE SQLSCRIPT AS 
BEGIN 


DECLARE START_DATE DATE;
DECLARE VAR_DATE DATE;
DECLARE END_DATE DATE;

SELECT TO_DATE(JOB_DATE,'yyyyMMdd') INTO START_DATE FROM "_SYS_BIC"."ZBW_SLT_JOB_DATE" WHERE JOBNAME='SLT_SD_IS04';
SELECT TO_DATE(JOB_DATE,'yyyyMMdd') INTO VAR_DATE FROM "_SYS_BIC"."ZBW_SLT_JOB_DATE" WHERE JOBNAME='SLT_SD_IS04';
SELECT CURRENT_DATE INTO END_DATE FROM DUMMY;

WHILE VAR_DATE <= END_DATE DO

DELETE FROM "_SYS_BIC"."BW_SD_IS04" where BILL_NUM IN (SELECT DISTINCT BILL_NUM 
FROM "_SYS_BIC"."uno/CV_SD_IS04" WHERE VBRK_ERDAT=TO_VARCHAR(VAR_DATE,'yyyyMMdd') 
OR VBAK_ERDAT=TO_VARCHAR(VAR_DATE,'yyyyMMdd')) and DOC_NUMBER IN (SELECT DISTINCT DOC_NUMBER 
FROM "_SYS_BIC"."uno/CV_SD_IS04" WHERE VBRK_ERDAT=TO_VARCHAR(VAR_DATE,'yyyyMMdd') 
OR VBAK_ERDAT=TO_VARCHAR(VAR_DATE,'yyyyMMdd'));


INSERT INTO "_SYS_BIC"."BW_SD_IS04"
--Keeps going with inserting and selecting attributes...

"