使用自治事務來記錄錯誤

以下過程是一個通用的過程，用於將應用程式中的所有錯誤記錄到常見錯誤日誌表中。

CREATE OR REPLACE PROCEDURE log_errors
(
  p_calling_program IN VARCHAR2,
  p_error_code IN INTEGER,
  p_error_description IN VARCHAR2
)
IS
  PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
  INSERT INTO error_log
  VALUES
  (
  p_calling_program,
  p_error_code,
  p_error_description,
  SYSDATE,
  USER
  );
  COMMIT;
END log_errors;

以下匿名 PLSQL 塊顯示瞭如何呼叫 log_errors 過程。

BEGIN
   DELETE FROM dept WHERE deptno = 10;
EXCEPTION
   WHEN OTHERS THEN
      log_errors('Delete dept',sqlcode, sqlerrm);
      RAISE;
END;

SELECT * FROM error_log;

CALLING_PROGRAM    ERROR_CODE    ERROR_DESCRIPTION                                                ERROR_DATETIME         DB_USER
Delete dept        -2292         ORA-02292: integrity constraint violated - child record found    08/09/2016             APEX_PUBLIC_USER