You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2019/02/08 05:04:00 UTC

[jira] [Updated] (ARROW-4097) [C++] Add function to "conform" a dictionary array to a target new dictionary

     [ https://issues.apache.org/jira/browse/ARROW-4097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated ARROW-4097:
--------------------------------
    Fix Version/s:     (was: 0.13.0)
                   0.14.0

> [C++] Add function to "conform" a dictionary array to a target new dictionary
> -----------------------------------------------------------------------------
>
>                 Key: ARROW-4097
>                 URL: https://issues.apache.org/jira/browse/ARROW-4097
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>             Fix For: 0.14.0
>
>
> Follow up work to ARROW-554. 
> Unifying multiple dictionary-encoded arrays is one use case. Another is rewriting a DictionaryArray to be based on another dictionary. For example, this would be used to implement Cast from one dictionary type to another.
> This will need to be able to insert nulls where there are values that are not found in the target dictionary
> see also discussion at https://github.com/apache/arrow/pull/3165#discussion_r243025730



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)