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-rw-r--r--synapse/storage/databases/__init__.py23
-rw-r--r--synapse/storage/databases/main/__init__.py24
-rw-r--r--synapse/storage/databases/main/event_push_actions.py7
3 files changed, 36 insertions, 18 deletions
diff --git a/synapse/storage/databases/__init__.py b/synapse/storage/databases/__init__.py
index 7f08bd8285..985b12df91 100644
--- a/synapse/storage/databases/__init__.py
+++ b/synapse/storage/databases/__init__.py
@@ -47,9 +47,14 @@ class Databases:
             engine = create_engine(database_config.config)
 
             with make_conn(database_config, engine) as db_conn:
-                logger.info("Preparing database %r...", db_name)
-
+                logger.info("[database config %r]: Checking database server", db_name)
                 engine.check_database(db_conn)
+
+                logger.info(
+                    "[database config %r]: Preparing for databases %r",
+                    db_name,
+                    database_config.databases,
+                )
                 prepare_database(
                     db_conn, engine, hs.config, databases=database_config.databases,
                 )
@@ -57,7 +62,9 @@ class Databases:
                 database = DatabasePool(hs, database_config, engine)
 
                 if "main" in database_config.databases:
-                    logger.info("Starting 'main' data store")
+                    logger.info(
+                        "[database config %r]: Starting 'main' database", db_name
+                    )
 
                     # Sanity check we don't try and configure the main store on
                     # multiple databases.
@@ -72,7 +79,9 @@ class Databases:
                         persist_events = PersistEventsStore(hs, database, main)
 
                 if "state" in database_config.databases:
-                    logger.info("Starting 'state' data store")
+                    logger.info(
+                        "[database config %r]: Starting 'state' database", db_name
+                    )
 
                     # Sanity check we don't try and configure the state store on
                     # multiple databases.
@@ -85,7 +94,7 @@ class Databases:
 
                 self.databases.append(database)
 
-                logger.info("Database %r prepared", db_name)
+                logger.info("[database config %r]: prepared", db_name)
 
             # Closing the context manager doesn't close the connection.
             # psycopg will close the connection when the object gets GCed, but *only*
@@ -98,10 +107,10 @@ class Databases:
 
         # Sanity check that we have actually configured all the required stores.
         if not main:
-            raise Exception("No 'main' data store configured")
+            raise Exception("No 'main' database configured")
 
         if not state:
-            raise Exception("No 'state' data store configured")
+            raise Exception("No 'state' database configured")
 
         # We use local variables here to ensure that the databases do not have
         # optional types.
diff --git a/synapse/storage/databases/main/__init__.py b/synapse/storage/databases/main/__init__.py
index 99890ffbf3..2ae2fbd5d7 100644
--- a/synapse/storage/databases/main/__init__.py
+++ b/synapse/storage/databases/main/__init__.py
@@ -29,6 +29,7 @@ from synapse.storage.util.id_generators import (
     MultiWriterIdGenerator,
     StreamIdGenerator,
 )
+from synapse.types import get_domain_from_id
 from synapse.util.caches.stream_change_cache import StreamChangeCache
 
 from .account_data import AccountDataStore
@@ -591,21 +592,24 @@ def check_database_before_upgrade(cur, database_engine, config: HomeServerConfig
     """Called before upgrading an existing database to check that it is broadly sane
     compared with the configuration.
     """
-    domain = config.server_name
+    logger.info("Checking database for consistency with configuration...")
 
-    sql = database_engine.convert_param_style(
-        "SELECT COUNT(*) FROM users WHERE name NOT LIKE ?"
-    )
-    pat = "%:" + domain
-    cur.execute(sql, (pat,))
-    num_not_matching = cur.fetchall()[0][0]
-    if num_not_matching == 0:
+    # if there are any users in the database, check that the username matches our
+    # configured server name.
+
+    cur.execute("SELECT name FROM users LIMIT 1")
+    rows = cur.fetchall()
+    if not rows:
+        return
+
+    user_domain = get_domain_from_id(rows[0][0])
+    if user_domain == config.server_name:
         return
 
     raise Exception(
         "Found users in database not native to %s!\n"
-        "You cannot changed a synapse server_name after it's been configured"
-        % (domain,)
+        "You cannot change a synapse server_name after it's been configured"
+        % (config.server_name,)
     )
 
 
diff --git a/synapse/storage/databases/main/event_push_actions.py b/synapse/storage/databases/main/event_push_actions.py
index 001d06378d..50fac9e72e 100644
--- a/synapse/storage/databases/main/event_push_actions.py
+++ b/synapse/storage/databases/main/event_push_actions.py
@@ -177,7 +177,12 @@ class EventPushActionsWorkerStore(SQLBaseStore):
 
         if row:
             notif_count += row[0]
-            unread_count += row[1]
+
+            if row[1] is not None:
+                # The unread_count column of event_push_summary is NULLable, so we need
+                # to make sure we don't try increasing the unread counts if it's NULL
+                # for this row.
+                unread_count += row[1]
 
         return {
             "notify_count": notif_count,