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Posted to issues@spark.apache.org by "Cheng Su (Jira)" <ji...@apache.org> on 2021/04/05 20:01:00 UTC

[jira] [Created] (SPARK-34960) Aggregate (Min/Max/Count) push down for ORC

Cheng Su created SPARK-34960:
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             Summary: 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


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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