Hi there, Im new here, but I have a short question I could very much use a quick answer, I am trying to find out how I could Filter empty value's. Is there a command similar to where (text is not Empty)
With regards, Arthur From: nagarjuna kanamarlapudi [mailto:nagarjuna.kanamarlap...@gmail.com] Sent: vrijdag 18 januari 2013 15:57 To: user@hive.apache.org Cc: u...@hadoop.apache.org Subject: Re: Execution of udf No but the query execution shows a reducer running .. And infant I feel that reduce phase can be there On Friday, January 18, 2013, Dean Wampler wrote: There is no reduce phase needed in this query. On Fri, Jan 18, 2013 at 6:59 AM, nagarjuna kanamarlapudi <nagarjuna.kanamarlap...@gmail.com<javascript:_e(%7b%7d,%20'cvml',%20'nagarjuna.kanamarlap...@gmail.com');>> wrote: Hi, Select col1,myudf(col2,col3) from table1; In what phase if map reduce an udf is executed. In the very beginning, I assumed that hive will be joining two tables., getting the required columns and then applies udf on columns specified I.e., essentially on reducer phase . But later on I realised that I was wrong. Is there any specific parameter which suggests hive to call udf at reducer phase rather than at Mapper phase. Regards, Nagarjuna -- Sent from iPhone -- Dean Wampler, Ph.D. thinkbiganalytics.com<http://thinkbiganalytics.com> +1-312-339-1330 -- Sent from iPhone
