add row_sequence UDF
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Key: HIVE-1304
URL: https://issues.apache.org/jira/browse/HIVE-1304
Project: Hadoop Hive
Issue Type: New Feature
Components: Metastore
Affects Versions: 0.6.0
Reporter: John Sichi
Assignee: John Sichi
Fix For: 0.6.0
This is a poor man's answer to the standard analytic function row_number(); it
assigns a sequence of numbers to rows, starting from 1.
I'm calling it row_sequence() to distinguish it from the real analytic
function, so that once we add support for those, there won't be any conflict
with the existing UDF.
The problem with this UDF approach is that there are no guarantees about
ordering in SQL processing internals, so use with caution.
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