What are the semantics for ROW_NUMBER? Is it a global row number? Per a
partition? Per a bucket?
On Wed, Feb 20, 2013 at 11:33 PM, kumar mr <[EMAIL PROTECTED]> wrote:
> This is Kumar, and this is my first question in this group.
> I have a requirement to implement ROW_NUMBER() from Teradata in Hive
> where partitioning happens on multiple columns along with multiple column
> It can be easily implemented in Hadoop MR, but I have to do in Hive. By
> doing in UDF can assign same rank to grouping key considering dataset is
> small, but ordering need to be done in prior step.
> Can we do this in lot simpler way?
> Thanks in advance.