Some Times Table is inserting Partial record from a view Why?

Question

The query consists of a simple insert statement where the data is inserted from a view. The issue is that some times only the first retreived record from the select statement are inserted into the table from a view and the rest are ignored when we scheduled in the batch job of EM console. Some times it inserted correctly.
For Ex.
INSERT INTO Table_COLL(COL_A, COL_B, COL_C)
SELECT COL_A, COL_B, COL_C
FROM COLL_VIEW
WHERE DATE=TRUNC(SYSDATE);
COMMIT;
The select statement retreives 200 records and the insert statement works perfectly as expected when executed in SQL* plus.
However the issue happens where only one record is inserted when the same query is scheduled in the batch job of the EM console or a procedure is created for the query and the same is scheduled in the EM console as a batch job and Some times it inserted correctly in EM Console.
Can anyone explain as why this is hapenning? (DB is Oracle 10g& size is 100gb )

Answer 1

I doubt that there is a bug. I suspect the query runs when you schedule it at a point of time where TRUNC(SYSDATE) gives less rows...
You could store the COUNT(*) and execution time before you run the INSERT in a LOG table. Any transaction based on two times (runtime and systime) can lead to unexpected results.
What about something like this:
INSERT INTO Table_COLL(COL_A, COL_B, COL_C)
SELECT COL_A, COL_B, COL_C
FROM COLL_VIEW a
LEFT JOIN Table_COLL B
ON (      a.COL_A = b.COL_A
      AND a.COL_B = b.COL_B
      AND a.COL_C = b.COL_C)
WHERE a.DATE>=TRUNC(SYSDATE)-1
AND b.COL_A IS NULL;
COMMIT;