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https://issues.apache.org/jira/browse/CALCITE-584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14303844#comment-14303844
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Julian Hyde commented on CALCITE-584:
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See comment thread on my blog post
http://julianhyde.blogspot.com/2014/05/table-macros.html.
> Allow TableMacro to return Table other than TranslatableTable
> -------------------------------------------------------------
>
> Key: CALCITE-584
> URL: https://issues.apache.org/jira/browse/CALCITE-584
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> The TableMacro.apply method used to return Table but in
> https://github.com/apache/incubator-calcite/commit/aa1f0983c126c23466deb990c96d6ff2dffd908c
> this changed to TranslatableTable. It seems reasonable to allow TableMacro
> to return other sub-types of Table, for example ScannableTable.
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