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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2014/08/30 00:05:57 UTC

[jira] [Resolved] (OPTIQ-393) If no fields are projected from a table, field trimmer should project a dummy expression

     [ https://issues.apache.org/jira/browse/OPTIQ-393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde resolved OPTIQ-393.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 0.9.1-incubating

Fixed in  http://git-wip-us.apache.org/repos/asf/incubator-optiq/commit/e60fa76e.

> If no fields are projected from a table, field trimmer should project a dummy expression
> ----------------------------------------------------------------------------------------
>
>                 Key: OPTIQ-393
>                 URL: https://issues.apache.org/jira/browse/OPTIQ-393
>             Project: Optiq
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Julian Hyde
>             Fix For: 0.9.1-incubating
>
>
> If no fields are projected from a table, field trimmer should project a dummy expression. Projecting no expressions is wrong, because it confuses other parts of the system; projecting all fields is wrong, because we would get data volume stats wrong and lose the opportunity to read less data from disk.



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