As a workaround , you can use - MAX(TOBAG(a,b,c)); For example , if a,b,c columns are of type int. Then, TOBAG(a,b,c) will have a schema of bag of integers, and the org.apache.pig.builtin.IntMax class will get used.
-Thejas On 5/20/11 11:24 AM, "Daniel Dai" <jiany...@yahoo-inc.com> wrote: It is not yet supported. See https://issues.apache.org/jira/browse/PIG-1577 Daniel On 05/20/2011 10:42 AM, Jonathan Coveney wrote: > My goal is to be able to make functions like GREATER(a,b,c...) which can > take any number of columns, and for each row will give the greater of them. > I also want to detect what type of columns they are, and use IntGREATER or > DoubleGREATER or whatever. > > A) has someone done something like this? > B) If not, how can I specify the correct Schema for getArgToFuncMapping? > Ideally it could just detect the schema of the first and go off of that, but > it looks like you have to match it directly... I tried overloading the > schema GREATER (where getArgTofuncMapping lives) and then using that to > figure out how many fields there are, but that didn't work. Should this > approach work? IE is getSchema called before getArgToFuncMapping? Is there a > cleaner way to do this? > > Thanks for your help! > Jon --
