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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-417) Implement Indexing in Hive
Date Wed, 09 Jun 2010 22:24:17 GMT

    [ https://issues.apache.org/jira/browse/HIVE-417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877236#action_12877236
] 

Ashish Thusoo commented on HIVE-417:
------------------------------------

A couple of comments on this:

A complication that happens by doing a rewrite just after parse is that you loose the ability
to report back errors that correspond to the original query. Also the 
metadata that you need to do the rewrite is only available after phase 1 of semantic analysis.
So in my opinion the rewrite should be done after semantic analysis but before plan generation.
Is that what you had in mind...

so something like...

[Query parser]
[Query semantic analysis]
[Query optimization]
...


> Implement Indexing in Hive
> --------------------------
>
>                 Key: HIVE-417
>                 URL: https://issues.apache.org/jira/browse/HIVE-417
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Metastore, Query Processor
>    Affects Versions: 0.3.0, 0.3.1, 0.4.0, 0.6.0
>            Reporter: Prasad Chakka
>            Assignee: He Yongqiang
>         Attachments: hive-417.proto.patch, hive-417-2009-07-18.patch, hive-indexing.3.patch
>
>
> Implement indexing on Hive so that lookup and range queries are efficient.

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