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Posted to issues@spark.apache.org by "Chao Sun (Jira)" <ji...@apache.org> on 2026/07/25 03:00:00 UTC

[jira] [Resolved] (SPARK-58310) Avoid runtime Bloom-filter subqueries containing Python UDFs

     [ https://issues.apache.org/jira/browse/SPARK-58310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chao Sun resolved SPARK-58310.
------------------------------
    Fix Version/s: 4.3.0
                   5.0.0
         Assignee: Chao Sun
       Resolution: Fixed

> Avoid runtime Bloom-filter subqueries containing Python UDFs
> ------------------------------------------------------------
>
>                 Key: SPARK-58310
>                 URL: https://issues.apache.org/jira/browse/SPARK-58310
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 4.3.0
>            Reporter: Chao Sun
>            Assignee: Chao Sun
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.3.0, 5.0.0
>
>
> When runtime Bloom filtering and adaptive query execution are enabled, InjectRuntimeFilter can build a Bloom-filter scalar subquery from a creation-side logical plan that contains a Python UDF. Runtime filter subqueries are introduced after subquery optimization, so the Python UDF in the newly constructed subquery is not extracted into a Python evaluation operator. Physical planning then reaches PythonUDF.doGenCode while executing the BloomFilterAggregate, causing an unevaluable-expression/code-generation failure.
> A nested query using a Python-normalized dimension, DISTINCT, an explicitly broadcast join, and a scalar aggregate reproduces the problem against Apache Spark master. Both standard scalar Python UDFs and Arrow-backed scalar pandas UDFs are affected.
> Skip only the runtime Bloom filter whose creation-side plan contains a Python UDF. Continue to inject safe Bloom filters when a Python UDF appears only on the application side. Add a regression that checks adaptive execution, exact query results, a Parquet round trip, standard and Arrow UDFs, and continued safe Bloom-filter injection.



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