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From nagarjuna kanamarlapudi <nagarjuna.kanamarlap...@gmail.com>
Subject Execution of udf
Date Fri, 18 Jan 2013 12:59:16 GMT
Hi,

Select col1,myudf(col2,col3) from table1;


In what phase if map reduce an udf is executed.

In the very beginning, I assumed that hive will be joining two tables.,
getting the required columns and then applies udf on columns specified
I.e., essentially on reducer phase . But later on I realised that I was
wrong.

Is there any specific parameter which suggests hive to call udf at reducer
phase rather than at Mapper phase.


Regards,
Nagarjuna


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