--- ckan/ckanext/datastore/backend/postgres.py	2021-02-18 11:01:56.692267462 +0100
+++ ckan/ckanext/datastore/backend/postgres-patch.py	2021-02-18 13:45:16.033193435 +0100
@@ -1690,7 +1690,7 @@
         read only user.
         '''
         write_connection = self._get_write_engine().connect()
-        read_connection_user = sa_url.make_url(self.read_url).username
+        read_connection_user = sa_url.make_url(self.read_url).username.split("@")[0]
 
         drop_foo_sql = u'DROP TABLE IF EXISTS _foo'