hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-10940) HiveInputFormat::pushFilters serializes PPD objects for each getRecordReader call
Date Fri, 05 Jun 2015 00:43:38 GMT
Gopal V created HIVE-10940:
------------------------------

             Summary: 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


{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.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message