def sql(self):
        return self.sql_statement
Remove a connector from the connection list of an input port
dataset/ETHPy150Open coursera/dataduct/dataduct/database/relation.py/Relation.sql--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/modules/vistrails_module.py/Module.remove_input_connector