Remove unused indices

This includes removing both unused indices and indices that are subsets
of other indices.

1 files changed, 42 insertions, 0 deletions

diff --git a/synapse/storage/schema/delta/32/remove_indices.sql b/synapse/storage/schema/delta/32/remove_indices.sql
new file mode 100644
index 0000000000..314fa51287
--- /dev/null
+++ b/synapse/storage/schema/delta/32/remove_indices.sql
@@ -0,0 +1,42 @@
+/* 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.
+ */
+
+
+-- The following indices are redundant, other indices are equivalent or
+-- supersets
+DROP INDEX IF EXISTS events_room_id;
+DROP INDEX IF EXISTS events_order;
+DROP INDEX IF EXISTS events_topological_ordering;
+DROP INDEX IF EXISTS events_stream_ordering;
+DROP INDEX IF EXISTS state_groups_id;
+DROP INDEX IF EXISTS event_to_state_groups_id;
+DROP INDEX IF EXISTS event_push_actions_room_id_event_id_user_id_profile_tag;
+DROP INDEX IF EXISTS event_push_actions_room_id_user_id;
+
+DROP INDEX IF EXISTS event_destinations_id;
+DROP INDEX IF EXISTS st_extrem_id;
+DROP INDEX IF EXISTS event_content_hashes_id;
+DROP INDEX IF EXISTS event_signatures_id;
+DROP INDEX IF EXISTS event_edge_hashes_id;
+DROP INDEX IF EXISTS redactions_event_id;
+DROP INDEX IF EXISTS remote_media_cache_thumbnails_media_id;
+DROP INDEX IF EXISTS room_hosts_room_id;
+DROP INDEX IF EXISTS event_search_ev_ridx;
+
+
+-- The following indices were unused
+DROP INDEX IF EXISTS evauth_edges_auth_id;
+DROP INDEX IF EXISTS topics_room_id;
+DROP INDEX IF EXISTS presence_stream_state;