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Posted to dev@drill.apache.org by "Boaz Ben-Zvi (JIRA)" <ji...@apache.org> on 2018/06/07 22:34:00 UTC

[jira] [Created] (DRILL-6479) Support for EMIT outcome in Hash Aggregate

Boaz Ben-Zvi created DRILL-6479:
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             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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