From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- storage/mozIStorageAggregateFunction.idl | 38 ++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 storage/mozIStorageAggregateFunction.idl (limited to 'storage/mozIStorageAggregateFunction.idl') diff --git a/storage/mozIStorageAggregateFunction.idl b/storage/mozIStorageAggregateFunction.idl new file mode 100644 index 000000000..28579318d --- /dev/null +++ b/storage/mozIStorageAggregateFunction.idl @@ -0,0 +1,38 @@ +/* -*- 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" + +interface mozIStorageConnection; +interface mozIStorageValueArray; +interface nsIArray; +interface nsIVariant; + +/** + * mozIStorageAggregateFunction represents aggregate SQL function. + * Common examples of aggregate functions are SUM() and COUNT(). + * + * An aggregate function calculates one result for a given set of data, where + * a set of data is a group of tuples. There can be one group + * per request or many of them, if GROUP BY clause is used or not. + */ +[scriptable, uuid(763217b7-3123-11da-918d-000347412e16)] +interface mozIStorageAggregateFunction : nsISupports { + /** + * onStep is called when next value should be passed to + * a custom function. + * + * @param aFunctionArguments The arguments passed in to the function + */ + void onStep(in mozIStorageValueArray aFunctionArguments); + + /** + * Called when all tuples in a group have been processed and the engine + * needs the aggregate function's value. + * + * @returns aggregate result as Variant. + */ + nsIVariant onFinal(); +}; -- cgit v1.2.3