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Date: Wed, 15 Sep 2010 13:08:33 -0400 (EDT)
From: "Ashutosh Chauhan (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Commented: (HIVE-1546) Ability to plug custom Semantic
 Analyzers for Hive Grammar
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    [ https://issues.apache.org/jira/browse/HIVE-1546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909799#action_12909799 ] 

Ashutosh Chauhan commented on HIVE-1546:
----------------------------------------

@John,
I took a look at the proposed new interface. I didn't go full in-depth into it yet to ascertain whether this works for Howl as desired or not, but I got the high level idea. It is a major redesign from the current patch. It will require some amount of design and dev work. This also implies all our testing (both unit and integration) which we have done on this patch till now is redundant and we need to redo that again as well. 

> Ability to plug custom Semantic Analyzers for Hive Grammar
> ----------------------------------------------------------
>
>                 Key: HIVE-1546
>                 URL: https://issues.apache.org/jira/browse/HIVE-1546
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Metastore
>    Affects Versions: 0.7.0
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.7.0
>
>         Attachments: hive-1546-3.patch, hive-1546-4.patch, hive-1546.patch, hive-1546_2.patch, Howl_Semantic_Analysis.txt
>
>
> It will be useful if Semantic Analysis phase is made pluggable such that other projects can do custom analysis of hive queries before doing metastore operations on them. 

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