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Date: Fri, 12 Jun 2015 21:08:00 +0000 (UTC)
From: "Sergey Shelukhin (JIRA)" <jira@apache.org>
To: issues@hive.apache.org
Message-ID: <JIRA.12835583.1433464978000.60582.1434143280926@Atlassian.JIRA>
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Subject: [jira] [Commented] (HIVE-10940) HiveInputFormat::pushFilters
 serializes PPD objects for each getRecordReader call
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    [ https://issues.apache.org/jira/browse/HIVE-10940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14584082#comment-14584082 ] 

Sergey Shelukhin commented on HIVE-10940:
-----------------------------------------

Why would it be null always?

> HiveInputFormat::pushFilters serializes PPD objects for each getRecordReader call
> ---------------------------------------------------------------------------------
>
>                 Key: HIVE-10940
>                 URL: https://issues.apache.org/jira/browse/HIVE-10940
>             Project: Hive
>          Issue Type: Bug
>          Components: File Formats
>    Affects Versions: 1.2.0
>            Reporter: Gopal V
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-10940.patch
>
>
> {code}
>     String filterText = filterExpr.getExprString();
>     String filterExprSerialized = Utilities.serializeExpression(filterExpr);
> {code}
> the serializeExpression initializes Kryo and produces a new packed object for every split.
> HiveInputFormat::getRecordReader -> pushProjectionAndFilters -> pushFilters.
> And Kryo is very slow to do this for a large filter clause.


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