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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