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Posted to issues@arrow.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/07/31 04:42:00 UTC

[jira] [Updated] (ARROW-6078) [Java] Implement dictionary-encoded subfields for List type

     [ https://issues.apache.org/jira/browse/ARROW-6078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-6078:
----------------------------------
    Labels: pull-request-available  (was: )

> [Java] Implement dictionary-encoded subfields for List type
> -----------------------------------------------------------
>
>                 Key: ARROW-6078
>                 URL: https://issues.apache.org/jira/browse/ARROW-6078
>             Project: Apache Arrow
>          Issue Type: Sub-task
>            Reporter: Ji Liu
>            Assignee: Ji Liu
>            Priority: Minor
>              Labels: pull-request-available
>
> For example, int type List (valueCount = 5) has data like below:
> 10, 20
> 10, 20
> 30, 40, 50
> 30, 40, 50
> 10, 20
> could be encoded to:
> 0, 1
> 0, 1
> 2, 3, 4
> 2, 3, 4
> 0, 1
> with list type dictionary
> 10, 20, 30, 40, 50
> or
> 10,
> 20,
> 30,
> 40,
> 50
>  



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