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https://issues.apache.org/jira/browse/HIVE-9153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14259106#comment-14259106
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Xuefu Zhang commented on HIVE-9153:
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[~lirui], is the test failure (dml) related to your patch?
> Evaluate CombineHiveInputFormat versus HiveInputFormat
> ------------------------------------------------------
>
> Key: HIVE-9153
> URL: https://issues.apache.org/jira/browse/HIVE-9153
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Brock Noland
> Assignee: Rui Li
> Attachments: HIVE-9153.1-spark.patch, HIVE-9153.1-spark.patch,
> HIVE-9153.2.patch, HIVE-9153.3.patch, screenshot.PNG
>
>
> The default InputFormat is {{CombineHiveInputFormat}} and thus HOS uses this.
> However, Tez uses {{HiveInputFormat}}. Since tasks are relatively cheap in
> Spark, it might make sense for us to use {{HiveInputFormat}} as well. We
> should evaluate this on a query which has many input splits such as {{select
> count(\*) from store_sales where something is not null}}.
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