Ok, there is UDF support in hive. So, I guess my question is how to create a UDF, what language is supported, and how to use a udf?
On Mon, Mar 28, 2011 at 11:13 AM, Michael Jiang <[email protected]>wrote: > I want to have a function that returns the hour information from a date > string (wiz not a known format supported by current date functions, but > basically this is just a use case example). In pig, you can create a UDF > (user defined function) and apply it to a column. Is there an equivalent > thing in Hive? I know I can write a mapper to take whole line and transform > the specific column I want. But it's not convenient because you have to > duplicate the same code for each different source table. > > Thanks! >
