Yuming Wang created SPARK-32792:
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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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