[jira] [Created] (DRILL-4682) Allow full schema identifier in SELECT clause

["Andries Engelbrecht (JIRA)" <ji...@apache.org>]

Andries Engelbrecht created DRILL-4682:
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             Summary: 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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