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Date: Sat, 20 Aug 2011 01:15:27 +0000 (UTC)
From: "Vaibhav Aggarwal (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: [jira] [Updated] (HIVE-2020) Create a separate namespace for Hive
 variables
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     [ https://issues.apache.org/jira/browse/HIVE-2020?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vaibhav Aggarwal updated HIVE-2020:
-----------------------------------

    Description: 
Support for variable substitution was added in HIVE-1096. However, variable substitution was implemented by reusing the HiveConf namespace, so there is no separation between Hive configuration properties and Hive variables.

This ticket encompasses the following enhancements:
* Create a separate namespace for managing Hive variables.
* Add support for setting variables on the command line via '-hivevar x=y'
* Add support for setting variables through the CLI via 'set hivevar:x=y'
* Add support for referencing variables in statements using either '${hivevar:var_name}' or '${var_name}'
* Provide a means for differentiating between hiveconf, hivevar, system, and environment properties in the output of 'set -v'


  was:
Support for variable substitution was added in HIVE-1096. However, variable substitution was implemented by reusing the HiveConf namespace, so there is no separation between Hive configuration properties and Hive variables.

This ticket encompasses the following enhancements:
* Create a separate namespace for managing Hive variables.
* Add support for setting variables on the command line via '-hivevar x=y'
* Add support for setting variables through the CLI via 'var x=y'
* Add support for referencing variables in statements using either '${hivevar:var_name}' or '${var_name}'
* Provide a means for differentiating between hiveconf, hivevar, system, and environment properties in the output of 'set -v'


> Create a separate namespace for Hive variables
> ----------------------------------------------
>
>                 Key: HIVE-2020
>                 URL: https://issues.apache.org/jira/browse/HIVE-2020
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Carl Steinbach
>            Assignee: Vaibhav Aggarwal
>         Attachments: HIVE-2020-2.patch, HIVE-2020-3.patch, HIVE-2020.patch
>
>
> Support for variable substitution was added in HIVE-1096. However, variable substitution was implemented by reusing the HiveConf namespace, so there is no separation between Hive configuration properties and Hive variables.
> This ticket encompasses the following enhancements:
> * Create a separate namespace for managing Hive variables.
> * Add support for setting variables on the command line via '-hivevar x=y'
> * Add support for setting variables through the CLI via 'set hivevar:x=y'
> * Add support for referencing variables in statements using either '${hivevar:var_name}' or '${var_name}'
> * Provide a means for differentiating between hiveconf, hivevar, system, and environment properties in the output of 'set -v'

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