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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/09/03 17:00:14 UTC
[jira] [Assigned] (SPARK-32792) Improve in filter pushdown for
ParquetFilters
[ https://issues.apache.org/jira/browse/SPARK-32792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-32792:
------------------------------------
Assignee: Apache Spark
> 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
> Assignee: Apache Spark
> Priority: Major
>
> [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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