[jira] [Commented] (SPARK-33098) Explicit or implicit casts involving partition columns can sometimes result in a MetaException.

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-33098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17223812#comment-17223812 ] 

Apache Spark commented on SPARK-33098:
--------------------------------------

User 'bersprockets' has created a pull request for this issue:
https://github.com/apache/spark/pull/30207

> Explicit or implicit casts involving partition columns can sometimes result in a MetaException.
> -----------------------------------------------------------------------------------------------
>
>                 Key: SPARK-33098
>                 URL: https://issues.apache.org/jira/browse/SPARK-33098
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Bruce Robbins
>            Priority: Major
>
> The following cases throw
> {{MetaException(message:Filtering is supported only on partition keys of type string)}}
> {noformat}
> sql("create table test (a int) partitioned by (b int) stored as parquet")
> sql("insert into test values (1, 1), (1, 2), (2, 2)")
> // These throw MetaExceptions
> sql("select * from test where b in ('2')").show(false)
> sql("select * from test where cast(b as string) = '2'").show(false)
> sql("select * from test where cast(b as string) in ('2')").show(false)
> sql("select * from test where cast(b as string) in (2)").show(false)
> sql("select cast(b as string) as b from test where b in ('2')").show(false)
> sql("select cast(b as string) as b from test").filter("b = '2'").show(false) // [1]
> sql("select cast(b as string) as b from test").filter("b in (2)").show(false) // [2]
> sql("select cast(b as string) as b from test").filter("b in ('2')").show(false)
> sql("select * from test where cast(b as string) > '1'").show(false)
> sql("select cast(b as string) b from test").filter("b > '1'").show(false) // [3]
> // [1] but not sql("select cast(b as string) as b from test where b = '2'").show(false)
> // [2] but not sql("select cast(b as string) as b from test where b in (2)").show(false)
> // [3] but not sql("select cast(b as string) b from test where b > '1'").show(false)
> {noformat}
> The message ("Filtering is supported only on partition keys of type string") is misleading. Filter *is* supported on integer columns, for example.



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