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https://issues.apache.org/jira/browse/CALCITE-3216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067447#comment-17067447
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TANG Wen-hui commented on CALCITE-3216:
---------------------------------------
I am working on this issue, it seems that EnumerableUnion does not processes
the inputs' RowType which are compatible but not totally same. I think we shoud
unify the RowType of the inputs with the RowType of Union before codegen phase,
because during the codegen phase, the RowType of the inputs has been already
translated to Java class.
> ClassCastException when running window function over union
> ----------------------------------------------------------
>
> Key: CALCITE-3216
> URL: https://issues.apache.org/jira/browse/CALCITE-3216
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Laurent Goujon
> Priority: Major
>
> I discovered an issue in Calcite execution engine which can be captured by
> this simple query:
> {code:sql}
> select *, count(*) over (partition by "id") from (
> select "id" from (VALUES(CAST(1 AS TINYINT))) "foo"("id")
> union
> select "id" from (VALUES(2)) "foo"("id"))
> {code}
> When running this query using JdbcTest for example, I got the following
> stacktrace:
> {noformat}
> Caused by: java.lang.ClassCastException: java.lang.Byte cannot be cast to
> java.lang.Integer
> at Baz$3.apply(ANONYMOUS.java:55)
> at
> org.apache.calcite.linq4j.DefaultEnumerable.foreach(DefaultEnumerable.java:77)
> at Baz.bind(Baz.java:43)
> at
> org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:355)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:316)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl._createIterable(CalciteMetaImpl.java:506)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:497)
> at
> org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:182)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:64)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:1)
> at
> org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:667)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:566)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:675)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> {noformat}
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