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https://issues.apache.org/jira/browse/CALCITE-3674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17115342#comment-17115342
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Haisheng Yuan commented on CALCITE-3674:
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[~vladimirsitnikov], does the following commit solve this issue?
https://github.com/apache/calcite/commit/bfde14be1284efc6d4560868fef3724238c35dc3
> EnumerableMergeJoinRule fails with NPE on nullable join keys
> ------------------------------------------------------------
>
> Key: CALCITE-3674
> URL: https://issues.apache.org/jira/browse/CALCITE-3674
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.21.0
> Reporter: Vladimir Sitnikov
> Priority: Major
>
> Sample exception:
> {noformat}
> Caused by: java.lang.NullPointerException
> at java.lang.Short.compareTo(Short.java:445)
> at java.lang.Short.compareTo(Short.java:43)
> at
> org.apache.calcite.linq4j.EnumerableDefaults$MergeJoinEnumerator.advance(EnumerableDefaults.java:3866)
> at
> org.apache.calcite.linq4j.EnumerableDefaults$MergeJoinEnumerator.moveNext(EnumerableDefaults.java:3918)
> at
> org.apache.calcite.linq4j.EnumerableDefaults.aggregate(EnumerableDefaults.java:118)
> at
> org.apache.calcite.linq4j.DefaultEnumerable.aggregate(DefaultEnumerable.java:104)
> at Baz.bind(Unknown Source)
> at
> org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:355)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:315){noformat}
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