[jira] [Created] (CALCITE-4040) Nonstandard SqlAggFunction rollup NPE Exception

["xzh_dz (Jira)" <ji...@apache.org>]

xzh_dz created CALCITE-4040:
-------------------------------

             Summary: Nonstandard SqlAggFunction rollup NPE Exception
                 Key: CALCITE-4040
                 URL: https://issues.apache.org/jira/browse/CALCITE-4040
             Project: Calcite
          Issue Type: Wish
            Reporter: xzh_dz


When i try to rollup some SqlAggFunctions in my project,I find something wrong.
A case can be reproduced as below:
MaterializationTest:
{code:java}
@Test public void testSqlAggFunctionRollup() {
    checkNoMaterialize(
        "select \"empid\", stddev_pop(\"deptno\") from \"emps\" group by \"empid\", \"deptno\"",
        "select \"empid\", stddev_pop(\"deptno\") from \"emps\" group by \"empid\"",
        HR_FKUK_MODEL);
  }
{code}
 If sql is not materialized, it should not throw an exception.
Exception:
{code:java}
java.sql.SQLException: Error while executing SQL "explain plan for select "empid", stddev_pop("deptno") from "emps" group by "empid"": null

	at org.apache.calcite.avatica.Helper.createException(Helper.java:56)
	at org.apache.calcite.avatica.Helper.createException(Helper.java:41)
	at org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:163)
	at org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:227)
	at org.apache.calcite.test.CalciteAssert.assertQuery(CalciteAssert.java:528)
Caused by: java.lang.NullPointerException
	at java.util.Objects.requireNonNull(Objects.java:203)
	at org.apache.calcite.rel.core.AggregateCall.<init>(AggregateCall.java:98)
	at org.apache.calcite.rel.core.AggregateCall.create(AggregateCall.java:198)
	at org.apache.calcite.plan.SubstitutionVisitor.unifyAggregates(SubstitutionVisitor.java:1854)
	at org.apache.calcite.plan.SubstitutionVisitor$AggregateToAggregateUnifyRule.apply(SubstitutionVisitor.java:1545)
	at org.apache.calcite.plan.SubstitutionVisitor.go(SubstitutionVisitor.java:544)
	at org.apache.calcite.plan.SubstitutionVisitor.go(SubstitutionVisitor.java:478)

{code}




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