[jira] [Created] (DRILL-4506) Allow substitution variables in SQL scripts

["Ian Hellstrom (JIRA)" <ji...@apache.org>]

Ian Hellstrom created DRILL-4506:
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             Summary: Allow substitution variables in SQL scripts
                 Key: DRILL-4506
                 URL: https://issues.apache.org/jira/browse/DRILL-4506
             Project: Apache Drill
          Issue Type: Bug
          Components: SQL Parser
            Reporter: Ian Hellstrom


It would be great if substitution variables could be created à la SQL*Plus in scripts. This would be especially helpful when objects need to be (re-)created from scratch (i.e. in testing), and they share e.g. workspaces, which have to be hard-coded otherwise.

The following is a rough idea (based on SQL*Plus syntax):

{code}
IN_LOCATION=hdfs.project
OUT_LOCATION=hdfs.storage

CREATE VIEW &OUT_LOCATION.view_name AS
SELECT * FROM &IN_LOCATION.table_name;
{code}

For a first implementation, it would be best to have simply substitution variables and not allow computations to be done, although it is conceivable that that would be a second step.



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