@hive.apache.orgmailto:user@hive.apache.org
Subject: Re: UDAF terminatePartial structure
Hi Robin,igor
Thanks for the suggestion and links. Based on examples I found, below is my
UDF. However, I am getting following error when trying to run it. Not sure what
the error means
= ERROR
Hi all,
I am writing my first UDAF. In my terminatePartial() function, I need to store
different data having different data types. Below is a list of items that I
need to store
1. C1 : list of doubles
2. C2: list of doubles
3. C3: double
4. Show: list of strings
I am wondering can I use
I believe a map will be passed correctly from the terminatePartial to the
merge functions. But it seems a bit of overkill.
Why not define a class within your UDAF which has 4 public data members,
and return instances of that class from terminatePartial()?
Robin
On 7/29/13 3:19 PM, Ritesh
Hi Robin,
Thanks for the suggestion. I did find such an example in Hadoop The definitive
guide book. However I am not total confused.
The book extends UDAF instead of AbstractGenericUDAFResolver. Which one is
recommended ?
Also the example in the book uses DoubleWritable as a return type
I found this Cloudera example helpful:
http://grepcode.com/file/repository.cloudera.com/content/repositories/releases/org.apache.hadoop.hive/hive-contrib/0.7.0-cdh3u0/org/apache/hadoop/hive/contrib/udaf/example/UDAFExampleMaxMinNUtil.java#UDAFExampleMaxMinNUtil.Evaluator
igor
decide.com
On
Hi Robin,igor
Thanks for the suggestion and links. Based on examples I found, below is my
UDF. However, I am getting following error when trying to run it. Not sure what
the error means
= ERROR
FAILED: Hive Internal Error:
