spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Rafael (Jira)" <>
Subject [jira] [Commented] (SPARK-15689) Data source API v2
Date Wed, 09 Oct 2019 15:36:01 GMT


Rafael commented on SPARK-15689:

Could you clarify whether 4 item from the original list was implemented:

_4. Nice-to-have: support additional common operators, including limit and sampling._

I wondering whether limit operation is optimized now, pushed to `PushedFilters: `

> Data source API v2
> ------------------
>                 Key: SPARK-15689
>                 URL:
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Reynold Xin
>            Assignee: Wenchen Fan
>            Priority: Major
>              Labels: SPIP, releasenotes
>             Fix For: 2.3.0
>         Attachments: SPIP Data Source API V2.pdf
> This ticket tracks progress in creating the v2 of data source API. This new API should
focus on:
> 1. Have a small surface so it is easy to freeze and maintain compatibility for a long
time. Ideally, this API should survive architectural rewrites and user-facing API revamps
of Spark.
> 2. Have a well-defined column batch interface for high performance. Convenience methods
should exist to convert row-oriented formats into column batches for data source developers.
> 3. Still support filter push down, similar to the existing API.
> 4. Nice-to-have: support additional common operators, including limit and sampling.
> Note that both 1 and 2 are problems that the current data source API (v1) suffers. The
current data source API has a wide surface with dependency on DataFrame/SQLContext, making
the data source API compatibility depending on the upper level API. The current data source
API is also only row oriented and has to go through an expensive external data type conversion
to internal data type.

This message was sent by Atlassian Jira

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message