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https://issues.apache.org/jira/browse/IMPALA-4297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16840845#comment-16840845
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Tim Armstrong commented on IMPALA-4297:
---------------------------------------

 IMPALA-4356 helped a lot here. We could still unroll the loop over all the 
columns, e.g. in HdfsParquetTableWriter::AppendRows().

> Codegen AppendRows() for HdfsTableSink
> --------------------------------------
>
>                 Key: IMPALA-4297
>                 URL: https://issues.apache.org/jira/browse/IMPALA-4297
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>    Affects Versions: Impala 2.6.0
>            Reporter: Greg Rahn
>            Priority: Major
>              Labels: codegen
>
> Currently codegen is not done for HdfsTableSink, this improvement would 
> enable that to make writing faster.



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