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https://issues.apache.org/jira/browse/DRILL-4682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15287066#comment-15287066
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Julian Hyde commented on DRILL-4682:
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The validator support was added to Calcite a while ago in
https://issues.apache.org/jira/browse/CALCITE-356. Not sure why this is not
showing up in Drill.
> Allow full schema identifier in SELECT clause
> ---------------------------------------------
>
> Key: DRILL-4682
> URL: https://issues.apache.org/jira/browse/DRILL-4682
> Project: Apache Drill
> Issue Type: Improvement
> Components: SQL Parser
> Reporter: Andries Engelbrecht
>
> Currently Drill requires aliases to identify columns in the SELECT clause
> when working with multiple tables/workspaces.
> Many BI/Analytical and other tools by default will use the full schema
> identifier in the select clause when generating SQL statements for execution
> for generic JDBC or ODBC sources. Not supporting this feature causes issues
> and a slower adoption of utilizing Drill as an execution engine within the
> larger Analytical SQL community.
> Propose to support
> SELECT <storage_plugin>.<workspace>.<table>.<column> FROM
> <storage_plugin>.<workspace>.<table>
> Also see DRILL-3510 for double quote support as per ANSI_QUOTES
> SELECT "<storage_plugin>"."<workspace>"."<table>"."<column>" FROM
> "<storage_plugin>"."<workspace>"."<table>"
> Which is very common generic SQL being generated by most tools when dealing
> with a generic SQL data source.
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