[jira] [Updated] (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>]

     [ https://issues.apache.org/jira/browse/SPARK-52878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Marin updated SPARK-52878:
---------------------------------
    Affects Version/s: 3.5.6

> 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: 3.5.6, 4.0.0
>            Reporter: Alexey Marin
>            Priority: Minor
>
> 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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