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https://issues.apache.org/jira/browse/CALCITE-4345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17216550#comment-17216550
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Jiatao Tao commented on CALCITE-4345:
-------------------------------------
!image-2020-10-19-16-59-44-900.png|width=1410,height=415!
> SUM CASE WHEN without else throws NPE
> -------------------------------------
>
> Key: CALCITE-4345
> URL: https://issues.apache.org/jira/browse/CALCITE-4345
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jiatao Tao
> Assignee: Jiatao Tao
> Priority: Major
> Attachments: image-2020-10-19-16-59-44-900.png
>
>
> Add a test in CsvTest:
>
> {code:java}
> @Test void testSumCaseWhenWithoutElse() throws SQLException {
> sql("model", "select sum( CASE WHEN empno=10 THEN 1 END ) from EMPS").ok();
> }
> {code}
> Will throw NPE
> {code:java}
> Caused by: java.lang.RuntimeException: Error while applying rule
> AggregateCaseToFilterRule, args
> [rel#18:LogicalAggregate.NONE.[](input=RelSubset#17,group={},EXPR$0=SUM($0)),
> rel#16:LogicalProject.NONE.[](input=RelSubset#15,exprs=[CASE(=($0, 10), 1,
> null:INTEGER)])] Caused by: java.lang.RuntimeException: Error while applying
> rule AggregateCaseToFilterRule, args
> [rel#18:LogicalAggregate.NONE.[](input=RelSubset#17,group={},EXPR$0=SUM($0)),
> rel#16:LogicalProject.NONE.[](input=RelSubset#15,exprs=[CASE(=($0, 10), 1,
> null:INTEGER)])] at
> org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:257)
> at
> org.apache.calcite.plan.volcano.IterativeRuleDriver.drive(IterativeRuleDriver.java:58)
> at
> org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:511)
> at org.apache.calcite.tools.Programs.lambda$standard$3(Programs.java:271) at
> org.apache.calcite.tools.Programs$SequenceProgram.run(Programs.java:331) at
> org.apache.calcite.prepare.Prepare.optimize(Prepare.java:166) at
> org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:299) at
> org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:208) at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:642)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:508)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:478)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:231)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:558)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:675)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> ... 63 more Caused by: java.lang.NullPointerException at
> org.apache.calcite.rex.RexLiteral.intValue(RexLiteral.java:1152) at
> org.apache.calcite.rel.rules.AggregateCaseToFilterRule.transform(AggregateCaseToFilterRule.java:231)
> at
> org.apache.calcite.rel.rules.AggregateCaseToFilterRule.onMatch(AggregateCaseToFilterRule.java:115)
> at
> org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:230)
> ... 77 more
> {code}
>
>
>
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