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https://issues.apache.org/jira/browse/CALCITE-817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14642292#comment-14642292
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Jesse Yates commented on CALCITE-817:
-------------------------------------
Ah, thanks!
> Extension column cannot have name "row"
> ---------------------------------------
>
> Key: CALCITE-817
> URL: https://issues.apache.org/jira/browse/CALCITE-817
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.4.0-incubating
> Reporter: Jesse Yates
> Assignee: Julian Hyde
>
> A weird corner case, but it seems like you cannot have an extension column
> with the name "row". Blows up with:
> {quote}
> Caused by: java.sql.SQLException: error while executing SQL "select stream *
> from orders EXTEND (row varchar)": parse failed: Encountered "row" at line 1,
> column 37.
> Was expecting one of:
> <IDENTIFIER> ...
> <QUOTED_IDENTIFIER> ...
> <BACK_QUOTED_IDENTIFIER> ...
> <BRACKET_QUOTED_IDENTIFIER> ...
> <UNICODE_QUOTED_IDENTIFIER> ...
>
> at org.apache.calcite.avatica.Helper.createException(Helper.java:41)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:112)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:130)
> at
> org.apache.calcite.test.CalciteAssert.assertQuery(CalciteAssert.java:450)
> ... 29 more
> Caused by: java.lang.RuntimeException: parse failed: Encountered "row" at
> line 1, column 37.
> Was expecting one of:
> <IDENTIFIER> ...
> <QUOTED_IDENTIFIER> ...
> <BACK_QUOTED_IDENTIFIER> ...
> <BRACKET_QUOTED_IDENTIFIER> ...
> <UNICODE_QUOTED_IDENTIFIER> ...
>
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:647)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:570)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:539)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:173)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:561)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:110)
> ... 31 more
> {quote}
> Any other name seems to work (but not sure where to check for this in the
> code).
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