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https://issues.apache.org/jira/browse/HIVE-2352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13080248#comment-13080248
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Ning Zhang commented on HIVE-2352:
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Franklin, a simpler description of your fix would be: create empty files if and
only if table is bucketed and hive.enforce.bucketing=true, right?
> selecting no rows and overwriting a table creates empty file for
> nonbucketized table
> ------------------------------------------------------------------------------------
>
> Key: HIVE-2352
> URL: https://issues.apache.org/jira/browse/HIVE-2352
> Project: Hive
> Issue Type: Bug
> Reporter: Franklin Hu
> Assignee: Franklin Hu
> Priority: Minor
> Attachments: hive-2352.1.patch
>
>
> create table t1 (key int, value string) stored as rcfile;
> insert overwrite table t1 select * from src where false;
> Creates an empty RCFile with no rows and size 151B. The file not should be
> created since there are no rows.
> Fix:
> If bucketing IS NOT enforced:
> Create empty files in neither bucketed nor non-bucketed tables
> If bucketing IS enforced:
> Do not create empty files in non-bucketed tables
> Create BUCKET_COUNT number of empty files for bucketed tables
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