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https://issues.apache.org/jira/browse/HIVE-5694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13809852#comment-13809852
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Sam Chen commented on HIVE-5694:
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Yes, that's solved the problem. I didn't see it before.
> on hbase table, function's result like 'count' or 'sum' is multiplied by the
> number of map tasks.
> -------------------------------------------------------------------------------------------------
>
> Key: HIVE-5694
> URL: https://issues.apache.org/jira/browse/HIVE-5694
> Project: Hive
> Issue Type: Bug
> Components: HBase Handler
> Affects Versions: 0.12.0
> Reporter: Sam Chen
> Attachments: HiveHBaseTableInputFormat.java
>
>
> when calling getRecordReader() on HiveHBaseTableInputFormat, it calls
> convertFilter(), which leads to the scanner on each map being set to the full
> range of where's clause
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