Wednesday, September 8, 2010

Exception handling for Bulk Insert and Bulk update using FORALL

DECLARE
TYPE NumList IS TABLE OF NUMBER;
-- The zeros in this list will cause divide-by-zero errors.
num_tab NumList := NumList(10,0,11,12,30,0,20,199,2,0,9,1);
errors NUMBER;
dml_errors EXCEPTION;
PRAGMA exception_init(dml_errors, -24381);
BEGIN
-- SAVE EXCEPTIONS means don't stop if some DELETEs fail.
FORALL i IN num_tab.FIRST..num_tab.LAST SAVE EXCEPTIONS
DELETE FROM emp2 WHERE salary > 500000/num_tab(i);
-- If any errors occurred during the FORALL SAVE EXCEPTIONS,
-- a single exception is raised when the statement completes.
EXCEPTION
WHEN dml_errors THEN -- Now we figure out what failed and why.
errors := SQL%BULK_EXCEPTIONS.COUNT;
dbms_output.put_line('Number of DELETE statements that failed: ' || errors);
FOR i IN 1..errors LOOP
dbms_output.put_line('Error #' || i || ' occurred during '||
'iteration #' || SQL%BULK_EXCEPTIONS(i).ERROR_INDEX);
dbms_output.put_line('Error message is ' ||
SQLERRM(-SQL%BULK_EXCEPTIONS(i).ERROR_CODE));
END LOOP;
END;