[
https://issues.apache.org/jira/browse/ARROW-1796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16568181#comment-16568181
]
Uwe L. Korn commented on ARROW-1796:
------------------------------------
I would start by contributing a pure Python implementation that already
implements all necessary filters and then we can move the predicate evaluation
either to Gandiva or pre-compiled C++. The pure Python pass is much simpler as
a first step and provides already a working interface at acceptable performance.
> [Python] RowGroup filtering on file level
> -----------------------------------------
>
> Key: ARROW-1796
> URL: https://issues.apache.org/jira/browse/ARROW-1796
> Project: Apache Arrow
> Issue Type: Improvement
> Reporter: Uwe L. Korn
> Assignee: Uwe L. Korn
> Priority: Major
> Fix For: 0.11.0
>
>
> We can build upon the API defined in {{fastparquet}} for defining RowGroup
> filters:
> https://github.com/dask/fastparquet/blob/master/fastparquet/api.py#L296-L300
> and translate them into the C++ enums we will define in
> https://issues.apache.org/jira/browse/PARQUET-1158 . This should enable us to
> provide the user with a simple predicate pushdown API that we can extend in
> the background from RowGroup to Page level later on.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
