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https://issues.apache.org/jira/browse/HIVE-1546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906041#action_12906041
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John Sichi commented on HIVE-1546:
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@Namit: the option of putting Howl directly into Hive was previously proposed
but dropped for the same reasons Alan mentioned above. Regarding hooks, could
you point me to the hook you're referring to? I don't believe Pre/Post have
enough information currently, do they?
@Carl: I don't think Howl cares about the query processing stuff like {Task and
FetchTask,QB,QBParseInfo,QBMetaData,QBJoinTree}. For the others, it's not any
time we touch them; it's only when we make breaking changes. And since Howl is
also open source, it's not like these are opaque dependencies. We would need
to do the same impact analysis if we used the contrib approach, right? I don't
see a big difference between the two except with contrib we get the convenience
of immediate compilation errors to tell us something broke. A continuous
integration setup for Howl would take us close to that.
@All: maybe we should set up a f2f meeting to hash this out?
> 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
>
>
> 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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