Part of the update is not working in Procedure - sql

Question

I have written two update statement in my procedure. For some strange reason first update statement only update some of the record (basically I update more than 100,000 rows). So second update statement works fine all the time. I brainstormed but procedure completes successfully but I am not getting what is the issue. Is there any way I can perform a validation check like how many got updated and and how many not?
1st update statement(Which update only some records sometimes)
UPDATE /*+PARALLEL(A,10,2)*/ VV_ACT_CALL_DET_DIS_EXTRACT A SET PRIORITY =
( SELECT P.PRIORITY
FROM VV_ACT_CALL_DET_DIS P
WHERE P.CALL_ID = A.CALL_ID
AND P.PRODUCT_ID = A.PRODUCT_ID
AND P.IS_DELETED = A.IS_DELETED
AND ROWVAL = 1 )
WHERE EXTRACT_STATUS = 'PENDING'
AND EXISTS
( SELECT B.PRIORITY
FROM VV_ACT_CALL_DET_DIS B
WHERE B.CALL_ID=A.CALL_ID
AND B.PRODUCT_ID = A.PRODUCT_ID
AND B.IS_DELETED = A.IS_DELETED );
2nd Update statement which updates record successfully all the time though condition is same as above
UPDATE /*+PARALLEL(A,10,2)*/ VV_ACT_CALL_DET_DIS_EXTRACT A SET TYPE =
( SELECT P.TYPE_VAL
FROM VV_ACT_CALL_DET_DIS P
WHERE P.CALL_ID = A.CALL_ID
AND P.PRODUCT_ID = A.PRODUCT_ID
AND P.IS_DELETED = A.IS_DELETED
AND ROWVAL = 1 )
WHERE EXTRACT_STATUS = 'PENDING'
AND EXISTS
( SELECT B.TYPE_VAL
FROM VV_ACT_CALL_DET_DIS B
WHERE B.CALL_ID = A.CALL_ID
AND B.PRODUCT_ID = A.PRODUCT_ID
AND B.IS_DELETED = A.IS_DELETED );

Answer 1

You can query the updated row count using SQL%rowcount right after the update statement (before the commit), e.g.:
update ....
if sql%rowcount <> nnn then --or = 0 or ...
raise_application_error(-20001, 'invalid number of rows updated: ' || sql%rowcount);
end if;
Regarding the 'why it is not updating issue': without seeing that actual data it is hard to tell. Can you give us an example data set? Is it possible, that the first statement updates the same number of rows, but data does not change (priority remains the same)?