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Posted to dev@avro.apache.org by "Thiruvalluvan M. G. (JIRA)" <ji...@apache.org> on 2018/12/30 04:18:02 UTC

[jira] [Updated] (AVRO-1195) trevni should support dictionary encoding based on selectivity and data type

     [ https://issues.apache.org/jira/browse/AVRO-1195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thiruvalluvan M. G. updated AVRO-1195:
--------------------------------------
    Component/s: java

> trevni should support dictionary encoding based on selectivity and data type
> ----------------------------------------------------------------------------
>
>                 Key: AVRO-1195
>                 URL: https://issues.apache.org/jira/browse/AVRO-1195
>             Project: Apache Avro
>          Issue Type: Improvement
>          Components: java
>    Affects Versions: 1.8.0
>            Reporter: alex gemini
>            Priority: Minor
>              Labels: compression, performance
>
> it would be nice if trevni support dictionary encoding. columnar format should first sort the columnar order based on selectivity .for lower selectivity column such as email or address trenvi should support dictionary encoding .more information will be found in paper "C-Store: A Column-oriented DBMS" section 3.1 :Encoding Schemes,type 4.



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