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Posted to issues@spark.apache.org by "Yuming Wang (Jira)" <ji...@apache.org> on 2020/09/03 16:50:00 UTC

[jira] [Created] (SPARK-32792) Improve in filter pushdown for ParquetFilters

Yuming Wang created SPARK-32792:
-----------------------------------

             Summary: Improve in filter pushdown for ParquetFilters
                 Key: SPARK-32792
                 URL: https://issues.apache.org/jira/browse/SPARK-32792
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.1.0
            Reporter: Yuming Wang


[https://github.com/apache/spark/blob/d6a68e0b67ff7de58073c176dd097070e88ac831/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala#L600-L602]
{code:scala}
      case sources.In(name, values) if canMakeFilterOn(name, values.head)
        && values.distinct.length <= pushDownInFilterThreshold =>
        values.distinct.flatMap { v =>
{code}

*distinct* is expensive
 



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