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https://issues.apache.org/jira/browse/CALCITE-1436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16234944#comment-16234944
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JD Zheng commented on CALCITE-1436:
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Any update on this bug? We are hitting this bug while using the druid-adapter.
I notice that the EnumerableAggregate works just fine. But the druid-adapter
will generate a physical plan to use BindableAggregate instead of
EnumberableAggregate. Is there any quick fix to make the druid-adapter to use
the EnumberableAggregate instead of BindableAggregate?
> AggregateNode NPE for aggregators other than SUM/COUNT
> ------------------------------------------------------
>
> Key: CALCITE-1436
> URL: https://issues.apache.org/jira/browse/CALCITE-1436
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Gian Merlino
> Assignee: Julian Hyde
> Priority: Major
>
> AggregateNode.getAccumulator does this for any aggregation other than COUNT
> or SUM:
> final AggImpState agg = new AggImpState(0, call, false);
> int stateSize = agg.state.size();
> This NPEs because "state" is null on freshly created AggImpState instances.
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