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Posted to jira@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2021/04/26 13:26:02 UTC
[jira] [Commented] (ARROW-11047) [Rust] [DataFusion] ParquetTable
should avoid scanning all files twice
[ https://issues.apache.org/jira/browse/ARROW-11047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17332330#comment-17332330 ]
Andrew Lamb commented on ARROW-11047:
-------------------------------------
Migrated to github: https://github.com/apache/arrow-datafusion/issues/136
> [Rust] [DataFusion] ParquetTable should avoid scanning all files twice
> ----------------------------------------------------------------------
>
> Key: ARROW-11047
> URL: https://issues.apache.org/jira/browse/ARROW-11047
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust - DataFusion
> Reporter: Andy Grove
> Priority: Minor
>
> ParquetTable currently reads the metadata for all files once in the constructor in order to get the schema, and does it again each time scan() is called.
> We could read the metadata once and cache it instead.
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