Propagate the fix to the py3compat version.

Author: rybesh

rdflib_sqlalchemy/SQLAlchemy.py

@@ -327,11 +327,16 @@ def pycompat_executeSQL(self, connection, qStr, params=None, paramList=False):
         except:
             pass
 
-        def locproc(item):
+        def py_to_sql(param):
+            if param is None:
+                return 'NULL'
+            if isinstance(param, int):
+                return param
             try:
-                return "'%s'" % item.decode()
+                return "'%s'" % param.decode()
             except:
-                return item
+                return param
+
         # _logger.debug("SQLGenerator %s - %s" % (qStr,params))
         if not params:
             querystr = qStr.replace('"', "'")
@@ -344,7 +349,7 @@ def locproc(item):
         elif paramList:
             raise Exception("Not supported!")
         else:
-            params = tuple([locproc(item) for item in params])
+            params = tuple(map(py_to_sql, params))
             querystr = qStr.replace('"', "'")
             querystr = querystr % params
             # if isinstance(qStr, bytes): qStr = qStr.decode()