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https://issues.apache.org/jira/browse/SPARK-39388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen updated SPARK-39388:
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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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