Bulk Collect EXCEPTION

Source

SQL%BULK_EXCEPTIONS(i).ERROR_CODE – Holds the exceptions error code.

The total number of exceptions can be returned using the collections COUNT method, which returns zero if no exceptions were raised.  The save_exceptions.sql script, a modified version of the handled_exception.sql script, demonstrates this functionality.

save_exceptions.sql

SET SERVEROUTPUT ON
DECLARE
  TYPE t_tab IS TABLE OF exception_test%ROWTYPE;

  l_tab          t_tab := t_tab();
  l_error_count  NUMBER; 

  ex_dml_errors EXCEPTION;
  PRAGMA EXCEPTION_INIT(ex_dml_errors, -24381);
BEGIN
  -- Fill the collection.
  FOR i IN 1 .. 100 LOOP
    l_tab.extend;
    l_tab(l_tab.last).id := i;
  END LOOP;

  -- Cause a failure.
  l_tab(50).id := NULL;
  l_tab(51).id := NULL; 

  EXECUTE IMMEDIATE 'TRUNCATE TABLE exception_test';

  -- Perform a bulk operation.
  BEGIN
    FORALL i IN l_tab.first .. l_tab.last SAVE EXCEPTIONS
      INSERT INTO exception_test
      VALUES l_tab(i);
  EXCEPTION
    WHEN ex_dml_errors THEN
      l_error_count := SQL%BULK_EXCEPTIONS.count;
      DBMS_OUTPUT.put_line('Number of failures: ' || l_error_count);
      FOR i IN 1 .. l_error_count LOOP
        DBMS_OUTPUT.put_line('Error: ' || i ||
          ' Array Index: ' || SQL%BULK_EXCEPTIONS(i).error_index ||
          ' Message: ' || SQLERRM(-SQL%BULK_EXCEPTIONS(i).ERROR_CODE));
      END LOOP;
  END;
END;
/

SET ECHO ON
SELECT COUNT(*)
FROM   exception_test;
SET ECHO OFF

The FORALL statement includes the SAVE EXCEPTIONS clause, and the exception handler displays the number of exceptions and their associated error messages.  The output from the save_exceptions.sql script is listed below.

SQL> @save_exceptions.sql

Number of failures: 2
Error: 1 Array Index: 50 Message: ORA-01400: cannot insert NULL into ()
Error: 2 Array Index: 51 Message: ORA-01400: cannot insert NULL into ()

PL/SQL procedure successfully completed.

SQL> SELECT COUNT(*)
  2  FROM   exception_test;

  COUNT(*)
----------
        98

1 row selected.

SQL> SET ECHO OFF

As expected the test table contains 98 of the 100 records, and the associated error message has been displayed by looping through the SQL%BULK_EXCEPTION collection.

If the SAVE EXCEPTIONS clause is omitted from the FORALL statement, execution of the bulk operation stops at the first exception and the SQL%BULK_EXCEPTIONS collection contains a single record.  The no_save_exceptions.sql script demonstrates this behavior.

no_save_exceptions.sql

SET SERVEROUTPUT ON
DECLARE
  TYPE t_tab IS TABLE OF exception_test%ROWTYPE;

  l_tab          t_tab := t_tab();
  l_error_count  NUMBER; 

  ex_dml_errors EXCEPTION;
  PRAGMA EXCEPTION_INIT(ex_dml_errors, -01400);
BEGIN
  -- Fill the collection.
  FOR i IN 1 .. 100 LOOP
    l_tab.extend;
    l_tab(l_tab.last).id := i;
  END LOOP;

  -- Cause a failure.
  l_tab(50).id := NULL;
  l_tab(51).id := NULL; 

  EXECUTE IMMEDIATE 'TRUNCATE TABLE exception_test';

  -- Perform a bulk operation.
  BEGIN
    FORALL i IN l_tab.first .. l_tab.last
      INSERT INTO exception_test
      VALUES l_tab(i);
  EXCEPTION
    WHEN ex_dml_errors THEN
      l_error_count := SQL%BULK_EXCEPTIONS.count;
      DBMS_OUTPUT.put_line('Number of failures: ' || l_error_count);
      FOR i IN 1 .. l_error_count LOOP
        DBMS_OUTPUT.put_line('Error: ' || i ||
          ' Array Index: ' || SQL%BULK_EXCEPTIONS(i).error_index ||
          ' Message: ' || SQLERRM(-SQL%BULK_EXCEPTIONS(i).ERROR_CODE));
     END LOOP;
  END;
END;
/

SET ECHO ON
SELECT COUNT(*)
FROM   exception_test;
SET ECHO OFF

Notice that in addition to the SAVE EXCEPTIONS clause being removed, the no_save_exceptions.sql script now traps a different error number.  The output from this script is listed below.

SQL> @no_save_exceptions.sql

Number of failures: 1
Error: 1 Array Index: 50 Message: ORA-01400: cannot insert NULL into
("TIM_HALL"."EXCEPTION_TEST"."ID")

PL/SQL procedure successfully completed.

SQL> SELECT COUNT(*)
  2  FROM   exception_test;

  COUNT(*)
----------
        49

1 row selected.

SQL> SET ECHO OFF

As expected there is only a single error in the SQL%BULK_EXCEPTIONS collection, and there are only 49 records in the test table as the operation has rolled back to the preceding implicit savepoint.