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From "alex.lv (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5537) hive return different results with and without index when hive.hadoop.supports.splittable.combineinputformat =true
Date Thu, 26 Sep 2013 03:50:03 GMT
alex.lv created MAPREDUCE-5537:
----------------------------------

             Summary: hive return different results with and without index when hive.hadoop.supports.splittable.combineinputformat
=true
                 Key: MAPREDUCE-5537
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5537
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: alex.lv


the  environment:
hive-0.8.1
hadoop-0.20.2-cdh3u6
the Presentation:
i use the hive-0.8.1 to exec the query:
select count(*) from table t1;

the table t1 is lzo formatted ,and the follows is :
# Storage Information                                                                    
                           
SerDe Library:                  org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe       
                           
InputFormat:                    com.hadoop.mapred.DeprecatedLzoTextInputFormat           
                           
OutputFormat:                   org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat


and the hive.hadoop.supports.splittable.combineinputformat =true
when i index the table t1,the result is  265329 .
when i remove the index of the t1,the result is  265325.

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