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Posted to issues@spark.apache.org by "Sean R. Owen (Jira)" <ji...@apache.org> on 2022/06/13 23:33:00 UTC

[jira] [Updated] (SPARK-39388) Reuse orcSchema when push down Orc predicates

     [ https://issues.apache.org/jira/browse/SPARK-39388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean R. Owen updated SPARK-39388:
---------------------------------
    Summary: Reuse orcSchema when push down Orc predicates  (was: Reuse orcScheam when push down Orc predicates)

> Reuse orcSchema when push down Orc predicates
> ---------------------------------------------
>
>                 Key: SPARK-39388
>                 URL: https://issues.apache.org/jira/browse/SPARK-39388
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.4.0
>            Reporter: Yang Jie
>            Priority: Minor
>
> `OrcUtils.readCatalystSchema` method will trigger a file IO to read `orcSchema` when Orc pushes down predicates.
> After SPARK-37463:
> -  For `OrcFileFormat`, we can reuse [a read `orcSchema`](https://github.com/apache/spark/blob/cc0bf563b8caea21da5692f05e34b5f77e002ab9/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/orc/OrcFileFormat.scala#L146) to save this file read IO when Orc pushes down predicates
> - For `OrcPartitionReaderFactory`  we can achieve the same goal by moving `OrcFile.createReader` before `pushDownPredicates`.



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