diff --git a/product/ZSQLCatalog/SQLCatalog.py b/product/ZSQLCatalog/SQLCatalog.py index eaf63d6ffa598d1746961433c8733bebe452fa2e..52611b54cf959538b2095153a869728e40e827b7 100644 --- a/product/ZSQLCatalog/SQLCatalog.py +++ b/product/ZSQLCatalog/SQLCatalog.py @@ -399,9 +399,12 @@ class Query(QueryMixin): elif value is None: where_expression.append("%s is NULL" % (key)) elif isinstance(value, (tuple, list)) and self.operator.upper() == 'IN': - escaped_value_list = [self._quoteSQLString(x) for x in value] - escaped_value_string = ', '.join(escaped_value_list) - where_expression.append("%s IN (%s)" % (key, escaped_value_string)) + if len(value): + escaped_value_list = [self._quoteSQLString(x) for x in value] + escaped_value_string = ', '.join(escaped_value_list) + where_expression.append("%s IN (%s)" % (key, escaped_value_string)) + else: + where_expression.('0') # "foo IN ()" is invalid SQL syntax, so use a "false" value. else: where_expression.append("%s = %s" % (self._quoteSQLKey(key), self._quoteSQLString(value)))