[jira] [Created] (SPARK-52878) Checkpointing a dataframe fails when it's based on another checkpoint that used a case-insentitive operation

["Alexey Marin (Jira)" <ji...@apache.org>]

Alexey Marin created SPARK-52878:
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             Summary: Checkpointing a dataframe fails when it's based on another checkpoint that used a case-insentitive operation
                 Key: SPARK-52878
                 URL: https://issues.apache.org/jira/browse/SPARK-52878
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 4.0.0
            Reporter: Alexey Marin


The following code in spark-shell fails when the last checkpoint() is called:

{{spark.sql("set spark.sql.caseSensitive=false")}}
{{sc.setCheckpointDir("/tmp/foo") }}
{{val df_1 = spark.range(1).toDF("foo").checkpoint()}}
{{val df_2 = df_1.where("Foo == 0").checkpoint()}}
{{val df_union = df_1.unionByName(df_2).checkpoint()}}
{{df_union.show()}}

 

Removing any of the checkpoints, not basing df_2 on df_1, or fixing the casing in the filter all avoid triggering this error.



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