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https://issues.apache.org/jira/browse/CALCITE-5941?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde reassigned CALCITE-5941:
------------------------------------
Assignee: Julian Hyde
> Support LITERAL_AGG in Interpreter
> ----------------------------------
>
> Key: CALCITE-5941
> URL: https://issues.apache.org/jira/browse/CALCITE-5941
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
>
> In CALCITE-4334 we added {{LITERAL_AGG}}, an internal aggregate function that
> returns a constant, but we did not extend {{Interpreter}} to execute queries
> containing {{LITERAL_AGG}}. This change fixes that.
> Without that change, {{Interpreter}} throws a {{NullPointerException}} during
> construction:
> {noformat}
> java.lang.NullPointerException: agg.state
> at java.base/java.util.Objects.requireNonNull(Objects.java:233)
> at
> org.apache.calcite.interpreter.AggregateNode.getAccumulator(AggregateNode.java:206)
> at
> org.apache.calcite.interpreter.AggregateNode.<init>(AggregateNode.java:95)
> at
> org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:54)
> at
> java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
> at java.base/java.lang.reflect.Method.invoke(Method.java:577)
> at
> org.apache.calcite.util.ReflectUtil.invokeVisitorInternal(ReflectUtil.java:263)
> at
> org.apache.calcite.util.ReflectUtil.invokeVisitor(ReflectUtil.java:220)
> at
> org.apache.calcite.util.ReflectUtil$1.invokeVisitor(ReflectUtil.java:470)
> at
> org.apache.calcite.interpreter.Interpreter$CompilerImpl.visit(Interpreter.java:358)
> at
> org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:48)
> at
> org.apache.calcite.interpreter.Interpreter$CompilerImpl.visitRoot(Interpreter.java:312)
> at
> org.apache.calcite.interpreter.Interpreter.<init>(Interpreter.java:88)
> {noformat}
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