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Posted to issues@arrow.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/08/10 13:49:00 UTC
[jira] [Updated] (ARROW-6185) [Java] Provide hash table based
dictionary builder
[ https://issues.apache.org/jira/browse/ARROW-6185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated ARROW-6185:
----------------------------------
Labels: pull-request-available (was: )
> [Java] Provide hash table based dictionary builder
> --------------------------------------------------
>
> Key: ARROW-6185
> URL: https://issues.apache.org/jira/browse/ARROW-6185
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Java
> Reporter: Liya Fan
> Assignee: Liya Fan
> Priority: Major
> Labels: pull-request-available
>
> This is related ARROW-5862. We provide another type of dictionary builder based on hash table. Compared with a search based dictionary encoder, a hash table based encoder process each new element in O(1) time, but require extra memory space.
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