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From "Namit Jain (JIRA)" <>
Subject [jira] Commented: (HIVE-417) Implement Indexing in Hive
Date Thu, 01 Jul 2010 21:38:56 GMT


Namit Jain commented on HIVE-417:

        if (work.getReducer() != null) {
          work.getReducer().jobClose(job, success, feedBack);
        if (IndexBuilderBaseReducer.class.isAssignableFrom(this
            .getReducerClass())) {
          this.closeIndexBuilder(job, success);

Instead of the above code in ExecDriver,  IndexBuilderBaseReducer/CompactSumReducer should
have a jobClose - no code
change needed in ExecDriver.

I would still vote for the index code to be in contrib, it will take some time to clean it
up - then it should be moved to the mainline.
Till then, it is usable, but in a prototype state.

What we should aim for is minimum changes in ql/. and put all changes in contrib for now.
As they become stable, we can pull them
in - even the DDLSemanticAnalyzer should be factored in contrib

> Implement Indexing in Hive
> --------------------------
>                 Key: HIVE-417
>                 URL:
>             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,
hive-indexing.5.thrift.patch, indexing_with_ql_rewrites_trunk_953221.patch
> Implement indexing on Hive so that lookup and range queries are efficient.

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