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authorAndrew Morgan <1342360+anoadragon453@users.noreply.github.com>2019-11-15 14:02:34 +0000
committerGitHub <noreply@github.com>2019-11-15 14:02:34 +0000
commit657d614f6a53f3dbfd2858bd85d0f81563db0041 (patch)
tree6ef5a4a9a9b3aaa14f0e80989c23445b59de3d38 /synapse/storage/data_stores
parentAdd optional python dependencies to snap packaging (#6317) (diff)
downloadsynapse-657d614f6a53f3dbfd2858bd85d0f81563db0041.tar.xz
Replace UPDATE with UPSERT on device_max_stream_id table (#6363)
Diffstat (limited to 'synapse/storage/data_stores')
-rw-r--r--synapse/storage/data_stores/main/deviceinbox.py17
1 files changed, 15 insertions, 2 deletions
diff --git a/synapse/storage/data_stores/main/deviceinbox.py b/synapse/storage/data_stores/main/deviceinbox.py
index f04aad0743..96cd0fb77a 100644
--- a/synapse/storage/data_stores/main/deviceinbox.py
+++ b/synapse/storage/data_stores/main/deviceinbox.py
@@ -358,8 +358,21 @@ class DeviceInboxStore(DeviceInboxWorkerStore, DeviceInboxBackgroundUpdateStore)
     def _add_messages_to_local_device_inbox_txn(
         self, txn, stream_id, messages_by_user_then_device
     ):
-        sql = "UPDATE device_max_stream_id" " SET stream_id = ?" " WHERE stream_id < ?"
-        txn.execute(sql, (stream_id, stream_id))
+        # Compatible method of performing an upsert
+        sql = "SELECT stream_id FROM device_max_stream_id"
+
+        txn.execute(sql)
+        rows = txn.fetchone()
+        if rows:
+            db_stream_id = rows[0]
+            if db_stream_id < stream_id:
+                # Insert the new stream_id
+                sql = "UPDATE device_max_stream_id SET stream_id = ?"
+        else:
+            # No rows, perform an insert
+            sql = "INSERT INTO device_max_stream_id (stream_id) VALUES (?)"
+
+        txn.execute(sql, (stream_id,))
 
         local_by_user_then_device = {}
         for user_id, messages_by_device in messages_by_user_then_device.items():