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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1546) Ability to plug custom Semantic Analyzers for Hive Grammar
Date Wed, 25 Aug 2010 18:16:19 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-1546:
-----------------------------------

    Attachment: hive-1546_2.patch

Attaching a new patch.

bq. In addition, I think we should introduce a new interface HiveSemanticAnalyzer and have
the factory produce that, since factories should generally produce interfaces rather than
classes (e.g. so that dynamic proxies can be used).

This got me thinking and I have redesigned the patch, so now we have factory producing factory
enabling dynamic proxying (abstractions and extensibility !) Your other comments got affected
by it because of it but I have taken care of them. 

Signature for method handleGenricFileFormat() was String[] because description for task and
task itself is created in analyzeCreateTable() and analyzeTableFileFormat() so that method
cant  be void, as it needs to return whatever information it gathered to its calling method.
Since at present we have no such file format, return value is ignored by calling methods.
However I changed it to Map<String,String> because that seems more useful then String[].

Added test-cases for all three cases you suggested.

> 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.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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