Split presence out of master (#9820)

2 files changed, 38 insertions, 0 deletions

diff --git a/synapse/storage/databases/main/schema/delta/59/12presence_stream_instance.sql b/synapse/storage/databases/main/schema/delta/59/12presence_stream_instance.sql
new file mode 100644
index 0000000000..b6ba0bda1a
--- /dev/null
+++ b/synapse/storage/databases/main/schema/delta/59/12presence_stream_instance.sql
@@ -0,0 +1,18 @@
+/* Copyright 2021 The Matrix.org Foundation C.I.C
+ *
+ * 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.
+ */
+
+-- Add a column to specify which instance wrote the row. Historic rows have
+-- `NULL`, which indicates that the master instance wrote them.
+ALTER TABLE presence_stream ADD COLUMN instance_name TEXT;
diff --git a/synapse/storage/databases/main/schema/delta/59/12presence_stream_instance_seq.sql.postgres b/synapse/storage/databases/main/schema/delta/59/12presence_stream_instance_seq.sql.postgres
new file mode 100644
index 0000000000..02b182adf9
--- /dev/null
+++ b/synapse/storage/databases/main/schema/delta/59/12presence_stream_instance_seq.sql.postgres
@@ -0,0 +1,20 @@
+/* Copyright 2021 The Matrix.org Foundation C.I.C
+ *
+ * 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 SEQUENCE IF NOT EXISTS presence_stream_sequence;
+
+SELECT setval('presence_stream_sequence', (
+    SELECT COALESCE(MAX(stream_id), 1) FROM presence_stream
+));