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Date: Mon, 1 Feb 2010 22:22:18 +0000 (UTC)
From: "Edward Capriolo (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Updated: (HIVE-1096) Hive Variables
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     [ https://issues.apache.org/jira/browse/HIVE-1096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edward Capriolo updated HIVE-1096:
----------------------------------

    Status: Patch Available  (was: Open)

> Hive Variables
> --------------
>
>                 Key: HIVE-1096
>                 URL: https://issues.apache.org/jira/browse/HIVE-1096
>             Project: Hadoop Hive
>          Issue Type: New Feature
>            Reporter: Edward Capriolo
>            Assignee: Edward Capriolo
>         Attachments: hive-1096-2.diff, hive-1096-7.diff, hive-1096.diff
>
>
> From mailing list:
> --Amazon Elastic MapReduce version of Hive seems to have a nice feature called "Variables." Basically you can define a variable via command-line while invoking hive with -d DT=2009-12-09 and then refer to the variable via ${DT} within the hive queries. This could be extremely useful. I can't seem to find this feature even on trunk. Is this feature currently anywhere in the roadmap?--
> This could be implemented in many places.
> A simple place to put this is 
> in Driver.compile or Driver.run we can do string substitutions at that level, and further downstream need not be effected. 
> There could be some benefits to doing this further downstream, parser,plan. but based on the simple needs we may not need to overthink this.
> I will get started on implementing in compile unless someone wants to discuss this more.

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