[jira] [Updated] (HIVE-15300) Reuse table information in SemanticAnalyzer::getMetaData to reduce compilation time

["Rajesh Balamohan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-15300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajesh Balamohan updated HIVE-15300:
------------------------------------
    Attachment: HIVE-15300.4.patch

Rebasing the patch with minor fixes. This is mainly for ObjectStore. If CachedStore is used, getTable wouldn't be expensive.

> Reuse table information in SemanticAnalyzer::getMetaData to reduce compilation time
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-15300
>                 URL: https://issues.apache.org/jira/browse/HIVE-15300
>             Project: Hive
>          Issue Type: Improvement
>          Components: Parser
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HIVE-15300.1.patch, HIVE-15300.2.patch, HIVE-15300.3.patch, HIVE-15300.4.patch
>
>
> E.g Q88 in tpc-ds takes lots of time to compile and it ends up getting the table details for the same table repeatedly. It took 20+seconds to compile the query.
> It would be good to reuse the table information in SemanticAnalyzer::getMetadata.



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