storage/mozIStorageFunction.idl
author Carsten "Tomcat" Book <cbook@mozilla.com>
Mon, 30 Nov 2015 13:19:02 +0100
changeset 310594 a18630f9ab42ddfde03ba8c7757a42069c48c7ed
parent 277037 ad01543457e739b4eee7a245e16734a3ecfd10ad
child 538050 020c8c871c0d3b3920fe95935cfef06501976c0f
permissions -rw-r--r--
merge mozilla-inbound to mozilla-central a=merge

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

#include "mozIStorageValueArray.idl"

interface mozIStorageConnection;
interface nsIArray;
interface nsIVariant;

/**
 * mozIStorageFunction is to be implemented by storage consumers that
 * wish to receive callbacks during the request execution.
 *
 * SQL can apply functions to values from tables. Examples of
 * such functions are MIN(a1,a2) or SQRT(num). Many functions are
 * implemented in SQL engine.
 *
 * This interface allows consumers to implement their own,
 * problem-specific functions.
 * These functions can be called from triggers, too.
 *
 */
[scriptable, function, uuid(9ff02465-21cb-49f3-b975-7d5b38ceec73)]
interface mozIStorageFunction : nsISupports {
  /**
   * onFunctionCall is called when execution of a custom
   * function should occur.
   * 
   * @param aNumArguments         The number of arguments
   * @param aFunctionArguments    The arguments passed in to the function
   *
   * @returns any value as Variant type.
   */

  nsIVariant onFunctionCall(in mozIStorageValueArray aFunctionArguments);
};