...@dotspots.com]
Sent: Friday, May 22, 2009 3:38 PM
To: pig-dev@hadoop.apache.org
Subject: UDF with parameters?
Hi,
I'm interested in developing a PERCENTILE UDF, e.g. for calculating a
median, 99th percentile, 90th percentile, etc. I'd like the UDF to be
parametric with respect to the percentile being
Hi,
I'm interested in developing a PERCENTILE UDF, e.g. for calculating a
median, 99th percentile, 90th percentile, etc. I'd like the UDF to be
parametric with respect to the percentile being requested, but I don't see
any way to do that, and it seems like I might need to create PERCENTILE_50,
Yes, it is possible. The UDF should take the percentage you want as a
constructor argument. It will have to be passed as a string and
converted. Then in your Pig Latin, you will use the DEFINE statement
to pass the argument to the constructor.
REGISTER /src/myfunc.jar
DEFINE percentile
