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https://issues.apache.org/jira/browse/CALCITE-4842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428543#comment-17428543
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Julian Hyde commented on CALCITE-4842:
--------------------------------------
This fix is adding some non-trivial concepts to the type system. There need to
be more tests than simply one or two queries, more documentation and code
structure.
> Nested row type fails with unsupported type Record2_2
> -----------------------------------------------------
>
> Key: CALCITE-4842
> URL: https://issues.apache.org/jira/browse/CALCITE-4842
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.27.0
> Reporter: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Queries with nested rows fail with the exception below
> for instance these queries could be used to reproduce
> {code:sql}
> select row(row(1));
> select row(row(1, 2), row(3, 4));
> {code}
> At the same time
> {code:sql}
> select array[row(row(1))];
> select array[row(row(1, 2), row(3, 4))];
> {code}
> are ok
> {noformat}
> java.sql.SQLException: Error while executing SQL "select row(row(1))":
> unsupported type Record1_0
> 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.execute(AvaticaStatement.java:217)
> at sqlline.Commands.executeSingleQuery(Commands.java:1130)
> at sqlline.Commands.execute(Commands.java:1079)
> at sqlline.Commands.sql(Commands.java:1033)
> at sqlline.SqlLine.dispatch(SqlLine.java:822)
> at sqlline.SqlLine.begin(SqlLine.java:596)
> at sqlline.SqlLine.start(SqlLine.java:269)
> at sqlline.SqlLine.main(SqlLine.java:208)
> Caused by: java.lang.RuntimeException: unsupported type Record1_0
> at org.apache.calcite.linq4j.tree.Types.toClass(Types.java:152)
> at org.apache.calcite.linq4j.tree.Types.toClassArray(Types.java:166)
> at org.apache.calcite.linq4j.tree.Expressions.call(Expressions.java:449)
> at
> org.apache.calcite.adapter.enumerable.EnumerableRelImplementor.classDecl(EnumerableRelImplementor.java:292)
> at
> org.apache.calcite.adapter.enumerable.EnumerableRelImplementor.access$000(EnumerableRelImplementor.java:79)
> at
> org.apache.calcite.adapter.enumerable.EnumerableRelImplementor$TypeRegistrar.register(EnumerableRelImplementor.java:562)
> at
> org.apache.calcite.adapter.enumerable.EnumerableRelImplementor$TypeRegistrar.register(EnumerableRelImplementor.java:566)
> at
> org.apache.calcite.adapter.enumerable.EnumerableRelImplementor$TypeRegistrar.go(EnumerableRelImplementor.java:576)
> at
> org.apache.calcite.adapter.enumerable.EnumerableRelImplementor.implementRoot(EnumerableRelImplementor.java:146)
> at
> org.apache.calcite.adapter.enumerable.EnumerableInterpretable.toBindable(EnumerableInterpretable.java:113)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl$CalcitePreparingStmt.implement(CalcitePrepareImpl.java:1130)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:318)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:215)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:647)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:513)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:483)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:249)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:623)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:675)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> ... 8 more
> {noformat}
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