oracle procedure with case It depends from parameter - oracle

Question

Hi I want to make a procedure like following:
CREATE OR REPLACE PROCEDURE SOL.INSERT_LD_NEXTPROCESS (vgroupid NUMBER)
IS
VPERIODID VARCHAR2 (10);
vPROCSESSID NUMBER;
CURSOR c
IS
SELECT COMPANYID,
GROUPID,
PERIODID,
FN_PPROCESSCURRENT
FROM LIQUIDATIONSDETAILS
WHERE PROCESSID = FN_PPROCESSPREVIOUS
AND (UNCOLLECTED > 0 OR INVOICE = 0)
I want to add an extra filter it depends from parameter:
CASE WHEN vgroupid > -1 then
AND GROUPID = vgroupid
ELSE
NULL
END
...
so the where cause like
WHERE PROCESSID = FN_PPROCESSPREVIOUS
AND (UNCOLLECTED > 0 OR INVOICE = 0) AND GROUPID = vgroupid
when vgroupid = -1 then I need all records an when vgroupid > -1 then I need only the records in vgroupid
any idea?

Answer 1

CURSOR c
IS
SELECT COMPANYID,
GROUPID,
PERIODID,
FN_PPROCESSCURRENT
FROM LIQUIDATIONSDETAILS
WHERE PROCESSID = FN_PPROCESSPREVIOUS
AND (UNCOLLECTED > 0 OR INVOICE = 0)
AND (((GROUPID = vgroupid) AND (vgroupid > -1)) OR (vgroupid = -1))
for example:
if vgroupid = -1, then last condition will be (((GROUPID = -1) AND (-1 > -1)) OR (-1 = -1)) or ((forever_false AND forever_false) OR (forever_true)) or (-1 = -1) - all records
instead, if vgroupid = 123 last condition will be (((GROUPID = 123) AND (123 > -1)) OR (123 = -1)) or (((GROUPID = 123) and forever_true) OR (forever_false)) or (GROUPID = 123) - only 123 GROUPID