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https://issues.apache.org/jira/browse/SPARK-34960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17315070#comment-17315070
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Cheng Su commented on SPARK-34960:
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Just FYI we will start sending out code after
[https://github.com/apache/spark/pull/32049] is merged. cc [~huaxingao], thanks.
> Aggregate (Min/Max/Count) push down for ORC
> -------------------------------------------
>
> Key: SPARK-34960
> URL: https://issues.apache.org/jira/browse/SPARK-34960
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Cheng Su
> Priority: Minor
>
> Similar to Parquet (https://issues.apache.org/jira/browse/SPARK-34952), we
> can also push down certain aggregations into ORC. ORC exposes column
> statistics in interface `org.apache.orc.Reader`
> ([https://github.com/apache/orc/blob/master/java/core/src/java/org/apache/orc/Reader.java#L118]
> ), where Spark can utilize for aggregation push down.
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