Allow UDAFs to short-circuit
----------------------------
Key: HIVE-2475
URL: https://issues.apache.org/jira/browse/HIVE-2475
Project: Hive
Issue Type: Improvement
Reporter: Adam Kramer
Priority: Minor
Imagine a udaf called ALL, which returns true when ALL of the entries in the
column are true. Then, this UDAF can return false for the group as soon as any
item seen is false. The Hive UDF framework should provide a manner by which a
UDAF can "short-circuit" further evaluation and thus systematically ignore the
rest of the rows that will be pushed in.
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