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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2020/12/23 01:31:01 UTC

[jira] [Resolved] (IMPALA-9310) OrcStringColumnReader could move blob instead of copy

     [ https://issues.apache.org/jira/browse/IMPALA-9310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-9310.
-----------------------------------
    Resolution: Later

Probably not worth keeping this open for now.

> OrcStringColumnReader could move blob instead of copy
> -----------------------------------------------------
>
>                 Key: IMPALA-9310
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9310
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>            Reporter: Norbert Luksa
>            Priority: Major
>              Labels: orc
>
> Since IMPALA-9226, in OrcStringColumnReader the blobs of a batch are copied to a freshly allocated space by Impala. As Zoltán pointed out in a [review|https://gerrit.cloudera.org/#/c/15051/1/be/src/exec/orc-column-readers.cc@158], a possible improvement is moving a blob by finding a way of getting hold of the memory allocated by the ORC library instead of copying.



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