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Posted to dev@parquet.apache.org by "Daniel Weeks (JIRA)" <ji...@apache.org> on 2016/03/09 19:22:41 UTC

[jira] [Comment Edited] (PARQUET-384) Add Dictionary Based Filtering to Filter2 API

    [ https://issues.apache.org/jira/browse/PARQUET-384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15187577#comment-15187577 ] 

Daniel Weeks edited comment on PARQUET-384 at 3/9/16 6:22 PM:
--------------------------------------------------------------

This now includes the api for reading dictionaries and supersedes PARQUET-374.


was (Author: dweeks-netflix):
This now includes the api for reading dictionaries.

> Add Dictionary Based Filtering to Filter2 API
> ---------------------------------------------
>
>                 Key: PARQUET-384
>                 URL: https://issues.apache.org/jira/browse/PARQUET-384
>             Project: Parquet
>          Issue Type: Improvement
>          Components: parquet-mr
>            Reporter: Daniel Weeks
>            Assignee: Daniel Weeks
>
> Dictionary based predicate evaluation show very significant gains for certain cases like the following:
>  - Sparse values in dictionary encoded columns
>  - Data staged sorted by fields used in predicate evaluation
> This would be good to introduce into the filter2 API.



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