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https://issues.apache.org/jira/browse/CALCITE-4234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-4234:
---------------------------------
Summary: RelBuilder throws NullPointerException while implementing
GROUP_ID() (was: RelBuilder throws NullPointerException while implementing
GROUP_ID)
> RelBuilder throws NullPointerException while implementing GROUP_ID()
> --------------------------------------------------------------------
>
> Key: CALCITE-4234
> URL: https://issues.apache.org/jira/browse/CALCITE-4234
> Project: Calcite
> Issue Type: Sub-task
> Components: core
> Affects Versions: 1.25.0
> Reporter: Vladimir Sitnikov
> Assignee: Julian Hyde
> Priority: Major
> Attachments: AggregateCall_create.png, AggregateCall_init.png,
> RelBuilder_aggregateCall.png
>
>
> {{RelBuilder}} throws {{NullPointerException}} while implementing
> {{GROUP_ID()}}.
> CALCITE-4220 introduced the following method:
> {code:java}
> @Override public AggregateCall aggregateCall() {
> return AggregateCall.create(aggFunction, distinct, approximate,
> ignoreNulls, ImmutableList.of(), -1, /* collation: */ null, /*
> type: */ null, alias);
> }
> {code}
> In practice {{AggregateCall}} constructor has {{null}} checks, so
> {{aggregateCall}} would always throw NPE:
> {code:java}
> this.type = Objects.requireNonNull(type);
> this.collation = Objects.requireNonNull(collation);
> {code}
> [~julianhyde], would you please check if that behavior is expected?
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