James Taylor created PHOENIX-2069:
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Summary: Support custom aggregate UDFs
Key: PHOENIX-2069
URL: https://issues.apache.org/jira/browse/PHOENIX-2069
Project: Phoenix
Issue Type: Bug
Reporter: James Taylor
We should build on our existing feature of custom UDFs to support custom
aggregate functions. We could drive the requirements initially from a YARN use
case to allow them to plugin a custom aggregator that would just be passed the
Tuple (i.e. List<Cell> for each row scanned) plus a context object. The custom
code code then do whatever aggregation is required and we'd have a hook to
serialize back out the per scan aggregation.
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