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From "Boaz Ben-Zvi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-6479) Support for EMIT outcome in Hash Aggregate
Date Thu, 07 Jun 2018 22:34:00 GMT
Boaz Ben-Zvi created DRILL-6479:
-----------------------------------

             Summary: Support for EMIT outcome in Hash Aggregate
                 Key: DRILL-6479
                 URL: https://issues.apache.org/jira/browse/DRILL-6479
             Project: Apache Drill
          Issue Type: Improvement
          Components: Execution - Relational Operators
            Reporter: Boaz Ben-Zvi
            Assignee: Boaz Ben-Zvi
             Fix For: 1.14.0


With the new Lateral and Unnest -- if a Hash-Aggregate operator is present in the sub-query,
then it needs to handle the EMIT outcome correctly. This means that when a EMIT is received
then perform the aggregation operation on the records buffered so far and produce the output
with it. After handling an EMIT the Hash-Aggr should refresh it's state and a continue to
work on the next batches of incoming records unless an EMIT is seen again.




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