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https://issues.apache.org/jira/browse/OPTIQ-393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde closed OPTIQ-393.
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> 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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