From ed992ae6ba7e0f97a526339a9782e10a410a6a2b Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 14 Sep 2016 16:09:32 +0100 Subject: Add a DB index to figure out past state at a stream ordering in a room --- .../schema/delta/35/stream_order_to_extrem.sql | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 synapse/storage/schema/delta/35/stream_order_to_extrem.sql (limited to 'synapse/storage/schema') diff --git a/synapse/storage/schema/delta/35/stream_order_to_extrem.sql b/synapse/storage/schema/delta/35/stream_order_to_extrem.sql new file mode 100644 index 0000000000..2b945d8a57 --- /dev/null +++ b/synapse/storage/schema/delta/35/stream_order_to_extrem.sql @@ -0,0 +1,37 @@ +/* Copyright 2016 OpenMarket Ltd + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +CREATE TABLE stream_ordering_to_exterm ( + stream_ordering BIGINT NOT NULL, + room_id TEXT NOT NULL, + event_id TEXT NOT NULL +); + +INSERT INTO stream_ordering_to_exterm (stream_ordering, room_id, event_id) + SELECT stream_ordering, room_id, event_id FROM event_forward_extremities + INNER JOIN ( + SELECT room_id, max(stream_ordering) as stream_ordering FROM events + INNER JOIN event_forward_extremities USING (room_id, event_id) + GROUP BY room_id + ) AS rms USING (room_id); + +CREATE INDEX stream_ordering_to_exterm_idx on stream_ordering_to_exterm( + stream_ordering +); + +CREATE INDEX stream_ordering_to_exterm_rm_idx on stream_ordering_to_exterm( + room_id, stream_ordering +); -- cgit 1.4.1