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https://issues.apache.org/jira/browse/DRILL-2361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14344574#comment-14344574
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Jacques Nadeau commented on DRILL-2361:
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Adam, this looks good, thanks. Would you be willing to add a few more tests of
other operators? I'm thinking that this isn't well tested and some others may
have similar issues.
> Column aliases cannot include dots
> ----------------------------------
>
> Key: DRILL-2361
> URL: https://issues.apache.org/jira/browse/DRILL-2361
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Affects Versions: 0.7.0, 0.8.0
> Reporter: Adam Gilmore
> Assignee: Chris Westin
> Priority: Minor
> Attachments: DRILL-2361.1.patch.txt
>
>
> The Drill query engine rejects column aliases for aggregates or group by
> fields where the alias includes a dot.
> For example:
> {code}select count(*) as `test.field` from cp.`employee.json`;{code}
> throws an error with "Field references must be singular names."
> Having reviewed the code, I can't quite see a reason for it, and when using
> FieldReference.getWithQuotedRef instead in AggPrelBase, the issue is
> alleviated with no visible side effects.
> I'm sure there was a reason for this code in FieldReference, but I can't seem
> to work out why, and it seems entirely reasonable to allow a dot in a column
> alias.
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