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https://issues.apache.org/jira/browse/CALCITE-1436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16512375#comment-16512375
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Michael Mior commented on CALCITE-1436:
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[~julianhyde] Thanks for keeping tabs on this. I should know better by know on
both those points. Sorry for that. Agreed that tests should be added.
Fixed in
[f84a3eb|https://github.com/apache/calcite/commit/f84a3eb330d4ac69dd412498398909a690e9ce2d]
> 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: Michael Mior
> Priority: Major
> Fix For: 1.17.0
>
>
> 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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