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Posted to issues@arrow.apache.org by "Neville Dipale (JIRA)" <ji...@apache.org> on 2019/04/21 21:23:00 UTC
[jira] [Commented] (ARROW-5191) [Rust] Expose schema in readers
(CSV, JSON) without reading batches
[ https://issues.apache.org/jira/browse/ARROW-5191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16822762#comment-16822762 ]
Neville Dipale commented on ARROW-5191:
---------------------------------------
Can work on this after 5181 is resolved
> [Rust] Expose schema in readers (CSV, JSON) without reading batches
> -------------------------------------------------------------------
>
> Key: ARROW-5191
> URL: https://issues.apache.org/jira/browse/ARROW-5191
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust
> Reporter: Neville Dipale
> Priority: Minor
>
> It's sometimes convenient to be able to view a datasource's schema without reading the first record batch. This is a proposal to create a `pub fn schema(&self) -> Arc<Schema>` on the various readers that we support.
> I think this would also enable schema inference in datafusion
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