What about the count or max? http://svn.apache.org/repos/asf/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java http://svn.apache.org/repos/asf/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
I've not used UDAFs, but I only got my UDTFs working by looking at the examples in the Hive SVN itself. HTH, Tim On Wed, Dec 8, 2010 at 3:27 PM, Leo Alekseyev <dnqu...@gmail.com> wrote: > I am trying to write a very simple aggregation function which seems > like an overkill for using GenericUDAF as described on the wiki. > However, I can't get the code to run. It always throws an exception > of the form > > java.lang.ClassNotFoundException: > com.hadoopbook.hive.Maximum$MaximumIntUDAFEvaluator > > (As you can see, even the sample code from Tom White's Hadoop book -- > the only sample code I found -- doesn't work.) I'm using the standard > add jar and create temporary function statements... > > --Leo >
