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-rw-r--r--synapse/storage/user_directory.py14
1 files changed, 7 insertions, 7 deletions
diff --git a/synapse/storage/user_directory.py b/synapse/storage/user_directory.py
index f150ef0103..dfdcbb3181 100644
--- a/synapse/storage/user_directory.py
+++ b/synapse/storage/user_directory.py
@@ -641,13 +641,12 @@ class UserDirectoryStore(SQLBaseStore):
         """
 
         if self.hs.config.user_directory_search_all_users:
-            # dummy to keep the number of binds & aliases the same
+            # make s.user_id null to keep the ordering algorithm happy
             join_clause = """
-                LEFT JOIN (
-                    SELECT NULL as user_id WHERE NULL = ?
-                ) AS s USING (user_id)"
+                CROSS JOIN (SELECT NULL as user_id) AS s
             """
-            where_clause = ""
+            join_args = ()
+            where_clause = "1=1"
         else:
             join_clause = """
                 LEFT JOIN users_in_public_rooms AS p USING (user_id)
@@ -656,6 +655,7 @@ class UserDirectoryStore(SQLBaseStore):
                     WHERE user_id = ? AND share_private
                 ) AS s USING (user_id)
             """
+            join_args = (user_id,)
             where_clause = "(s.user_id IS NOT NULL OR p.user_id IS NOT NULL)"
 
         if isinstance(self.database_engine, PostgresEngine):
@@ -697,7 +697,7 @@ class UserDirectoryStore(SQLBaseStore):
                     avatar_url IS NULL
                 LIMIT ?
             """ % (join_clause, where_clause)
-            args = (user_id, full_query, exact_query, prefix_query, limit + 1,)
+            args = join_args + (full_query, exact_query, prefix_query, limit + 1,)
         elif isinstance(self.database_engine, Sqlite3Engine):
             search_query = _parse_query_sqlite(search_term)
 
@@ -715,7 +715,7 @@ class UserDirectoryStore(SQLBaseStore):
                     avatar_url IS NULL
                 LIMIT ?
             """ % (join_clause, where_clause)
-            args = (user_id, search_query, limit + 1)
+            args = join_args + (search_query, limit + 1)
         else:
             # This should be unreachable.
             raise Exception("Unrecognized database engine")