Added a base class for UDTF
Added a base class for UDTF
NaokiStones/hivemall,daijyc/hivemall,naritta/hivemall,naritta/hivemall,NaokiStones/hivemall,daijyc/hivemall,NaokiStones/hivemall,tempbottle/hivemall,naritta/hivemall,tempbottle/hivemall,daijyc/hivemall,tempbottle/hivemall