Rename database classes to make some sense (#8033)

synapse/storage/databases/main/schema/delta/37/remove_auth_idx.py

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+# 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.
+
+import logging
+
+from synapse.storage.engines import PostgresEngine
+from synapse.storage.prepare_database import get_statements
+
+logger = logging.getLogger(__name__)
+
+DROP_INDICES = """
+-- We only ever query based on event_id
+DROP INDEX IF EXISTS state_events_room_id;
+DROP INDEX IF EXISTS state_events_type;
+DROP INDEX IF EXISTS state_events_state_key;
+
+-- room_id is indexed elsewhere
+DROP INDEX IF EXISTS current_state_events_room_id;
+DROP INDEX IF EXISTS current_state_events_state_key;
+DROP INDEX IF EXISTS current_state_events_type;
+
+DROP INDEX IF EXISTS transactions_have_ref;
+
+-- (topological_ordering, stream_ordering, room_id) seems like a strange index,
+-- and is used incredibly rarely.
+DROP INDEX IF EXISTS events_order_topo_stream_room;
+
+-- an equivalent index to this actually gets re-created in delta 41, because it
+-- turned out that deleting it wasn't a great plan :/. In any case, let's
+-- delete it here, and delta 41 will create a new one with an added UNIQUE
+-- constraint
+DROP INDEX IF EXISTS event_search_ev_idx;
+"""
+
+POSTGRES_DROP_CONSTRAINT = """
+ALTER TABLE event_auth DROP CONSTRAINT IF EXISTS event_auth_event_id_auth_id_room_id_key;
+"""
+
+SQLITE_DROP_CONSTRAINT = """
+DROP INDEX IF EXISTS evauth_edges_id;
+
+CREATE TABLE IF NOT EXISTS event_auth_new(
+    event_id TEXT NOT NULL,
+    auth_id TEXT NOT NULL,
+    room_id TEXT NOT NULL
+);
+
+INSERT INTO event_auth_new
+    SELECT event_id, auth_id, room_id
+    FROM event_auth;
+
+DROP TABLE event_auth;
+
+ALTER TABLE event_auth_new RENAME TO event_auth;
+
+CREATE INDEX evauth_edges_id ON event_auth(event_id);
+"""
+
+
+def run_create(cur, database_engine, *args, **kwargs):
+    for statement in get_statements(DROP_INDICES.splitlines()):
+        cur.execute(statement)
+
+    if isinstance(database_engine, PostgresEngine):
+        drop_constraint = POSTGRES_DROP_CONSTRAINT
+    else:
+        drop_constraint = SQLITE_DROP_CONSTRAINT
+
+    for statement in get_statements(drop_constraint.splitlines()):
+        cur.execute(statement)
+
+
+def run_upgrade(cur, database_engine, *args, **kwargs):
+    pass

synapse/storage/databases/main/schema/delta/37/user_threepids.sql

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+/* 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.
+ */
+
+/*
+ * Update any email addresses that were stored with mixed case into all
+ * lowercase
+ */
+
+ -- There may be "duplicate" emails (with different case) already in the table,
+ -- so we find them and move all but the most recently used account.
+ UPDATE user_threepids
+ SET medium = 'email_old'
+ WHERE medium = 'email'
+    AND address IN (
+         -- We select all the addresses that are linked to the user_id that is NOT
+         -- the most recently created.
+         SELECT u.address
+         FROM
+             user_threepids AS u,
+             -- `duplicate_addresses` is a table of all the email addresses that
+             -- appear multiple times and when the binding was created
+             (
+                 SELECT lower(u1.address) AS address, max(u1.added_at) AS max_ts
+                 FROM user_threepids AS u1
+                 INNER JOIN user_threepids AS u2 ON u1.medium = u2.medium AND lower(u1.address) = lower(u2.address) AND u1.address != u2.address
+                 WHERE u1.medium = 'email' AND u2.medium = 'email'
+                 GROUP BY lower(u1.address)
+             ) AS duplicate_addresses
+         WHERE
+             lower(u.address) = duplicate_addresses.address
+             AND u.added_at != max_ts  -- NOT the most recently created
+     );
+
+
+-- This update is now safe since we've removed the duplicate addresses.
+UPDATE user_threepids SET address = LOWER(address) WHERE medium = 'email';
+
+
+/* Add an index for the select we do on passwored reset */
+CREATE INDEX user_threepids_medium_address on user_threepids (medium, address);