Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
Hive >> mail # user >> UDAF terminatePartial structure

Copy link to this message
Re: UDAF terminatePartial structure
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()?

On 7/29/13 3:19 PM, "Ritesh Agrawal" <[EMAIL PROTECTED]> wrote:

>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 simple HashMap and store these different objects
>into it. Will it automatically serialize or will I need to write my own
>serializiable method. Also is there any example of a UDAF that shows how
>to use map type structure for storing partial results.