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https://issues.apache.org/jira/browse/DRILL-5457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16030372#comment-16030372
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ASF GitHub Bot commented on DRILL-5457:
---------------------------------------
Github user Ben-Zvi commented on a diff in the pull request:
https://github.com/apache/drill/pull/822#discussion_r119241352
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/aggregate/HashAggBatch.java
---
@@ -136,15 +136,21 @@ public IterOutcome innerNext() {
return IterOutcome.NONE;
}
- if (aggregator.buildComplete() && !aggregator.allFlushed()) {
- // aggregation is complete and not all records have been output yet
- return aggregator.outputCurrentBatch();
+ // if aggregation is complete and not all records have been output yet
+ if (aggregator.buildComplete() ||
+ // or: 1st phase need to return (not fully grouped) partial output
due to memory pressure
+ aggregator.earlyOutput()) {
+ // then output the next batch downstream
+ IterOutcome out = aggregator.outputCurrentBatch();
--- End diff --
Done !! Looks so simple in retrospective ...
> Support Spill to Disk for the Hash Aggregate Operator
> -----------------------------------------------------
>
> Key: DRILL-5457
> URL: https://issues.apache.org/jira/browse/DRILL-5457
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Relational Operators
> Affects Versions: 1.10.0
> Reporter: Boaz Ben-Zvi
> Assignee: Boaz Ben-Zvi
> Fix For: 1.11.0
>
>
> Support gradual spilling memory to disk as the available memory gets too
> small to allow in memory work for the Hash Aggregate Operator.
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