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https://issues.apache.org/jira/browse/HIVE-1546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906185#action_12906185
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Namit Jain commented on HIVE-1546:
----------------------------------
I agree it would be good to have a meeting.
btw, the hooks I was referrring to and Pre/Post Execution Statement level
hooks, with the following signature:
public interface PostExecute {
/**
* The run command that is called just before the execution of the query.
*
* @param sess
* The session state.
* @param inputs
* The set of input tables and partitions.
* @param outputs
* The set of output tables, partitions, local and hdfs directories.
* @param lInfo
* The column level lineage information.
* @param ugi
* The user group security information.
*/
void run(SessionState sess, Set<ReadEntity> inputs,
Set<WriteEntity> outputs, LineageInfo lInfo,
UserGroupInformation ugi) throws Exception;
}
Looking at the spec., it looks like a subset of DDLs need to be supported,
which can be easily accomplished via the hook.
If need be, we can pass more info. in the hook - there was a plan to add job
level hook also, which is not checked in,
but via which the configuration etc. can be changed.
> 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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