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[jira] [Created] (CALCITE-2646) Support nullable struct type

Ted Xu created CALCITE-2646:

             Summary: Support nullable struct type
                 Key: CALCITE-2646
                 URL: https://issues.apache.org/jira/browse/CALCITE-2646
             Project: Calcite
          Issue Type: Improvement
            Reporter: Ted Xu
            Assignee: Julian Hyde

The struct type (or RelRecordType) is hard coded NOT nullable, which lead exception thrown when invoking:

{{RexBuilder.makeLiteral(null, structType);}}

The exception looks like following:

        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:108)
        at org.apache.calcite.rex.RexLiteral.<init>(RexLiteral.java:217)


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