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Posted to issues@spark.apache.org by "Takeshi Yamamuro (JIRA)" <ji...@apache.org> on 2016/01/07 06:41:39 UTC

[jira] [Created] (SPARK-12686) Support group-by push down into data sources

Takeshi Yamamuro created SPARK-12686:
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             Summary: Support group-by push down into data sources
                 Key: SPARK-12686
                 URL: https://issues.apache.org/jira/browse/SPARK-12686
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 1.6.0
            Reporter: Takeshi Yamamuro


As for logical plan nodes like 'Aggregate -> Project -> (Filter) -> Scan', we can push down partial aggregation processing into data sources that could aggregate their own data efficiently because Orc/Parquet could fetch the MIN/MAX value by using statistics data and some databases have efficient aggregation implementations.




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