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From "Carl Steinbach (JIRA)" <>
Subject [jira] Commented: (HIVE-1546) Ability to plug custom Semantic Analyzers for Hive Grammar
Date Thu, 02 Sep 2010 04:00:53 GMT


Carl Steinbach commented on HIVE-1546:

@Ashutosh: Can you provide some background on what you hope to accomplish with this? What
is the motivating use case, i.e. what custom SemanticAnalyzer do you plan to write?

Also, how are the new INPUTDRIVER and OUTPUTDRIVER properties used? By adding these to the
Hive grammar it seems like we may be providing a mechanism for defining tables in the MetaStore
that Hive can't read or write to. If that's the case what are your plans for adding this support
to Hive?

> Ability to plug custom Semantic Analyzers for Hive Grammar
> ----------------------------------------------------------
>                 Key: HIVE-1546
>                 URL:
>             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
> 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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