1 Reply Latest reply on Oct 9, 2013 8:08 PM by Robert Morton

    hive management of the date

    Arnaud Gaillard

      Hello,

       

      I'm trying to use hive to plot simple things.I'm currently working with Hive (0.11) on a small dataset (about 6Gb/6 millions of lines), with tableau 8.0.4.

       

      However I cannot make date aggregation work.

       

      My date is in the format, 16/06/13 18:30:01.240856. Based on numerous post I found here, I understood that I had to create a calculated field to manage it. Here my formula:

      DATETIME(LEFT([idx_timestamp],17 ) )

       

      until here everything is fine.

       

      Now if I try to do a simple aggregation plot (get #of event per minute), it seems that the date is not recognized and I always get NULL or the 30th December 1899.... (and the total # of events)

       

      I made a test and imported directly in Tableau a small sample of 100 lines. If I use this sample everything is working perfectly fine. I can plot without any issue a # of event per minute The date is recognized and the time is right. But doing exactly the same things on the hive cluster give me nothing.

       

      Am I facing a performance issue here on tableau side? If a do a simple sql group by request to get what I want I get my result in under 20 seconds from the hive console. Do I have to use custom sql for this kind of request?