run lists if queries

oml/db.py

@@ -80,8 +80,11 @@ class MutableDict(Mutable, dict):
         self.changed()
 
 def run_sql(sql):
+    if isinstance(sql, str):
+        sql = [sql]
     with session() as s:
-        s.connection().execute(sql)
+        for q in sql:
+            s.connection().execute(q)
         s.commit()
 
 def table_exists(table):