[jira] [Assigned] (SPARK-15462) Checking `resolved === false` is enough for testcases.

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

     [ https://issues.apache.org/jira/browse/SPARK-15462?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-15462:
------------------------------------

    Assignee:     (was: Apache Spark)

> Checking `resolved === false` is enough for testcases.
> ------------------------------------------------------
>
>                 Key: SPARK-15462
>                 URL: https://issues.apache.org/jira/browse/SPARK-15462
>             Project: Spark
>          Issue Type: Test
>          Components: SQL, Tests
>            Reporter: Dongjoon Hyun
>            Priority: Minor
>
> In only `catalyst` module, there exists 7 evaluation test cases on unresolved expressions. But, in real-world situation, those cases doesn't happen since they occurs exceptions before evaluations.
> {code}
> scala> sql("select format_number(null, 3)")
> res0: org.apache.spark.sql.DataFrame = [format_number(CAST(NULL AS DOUBLE), 3): string]
> scala> sql("select format_number(cast(null as NULL), 3)")
> org.apache.spark.sql.catalyst.parser.ParseException:
> DataType null() is not supported.(line 1, pos 34)
> {code}
> This PR makes those testcases more realistic.
> {code}
> -    checkEvaluation(FormatNumber(Literal.create(null, NullType), Literal(3)), null)
> +    assert(FormatNumber(Literal.create(null, NullType), Literal(3)).resolved === false)
> {code}
> Also, this PR also removes redundant `resolved` checking in `FoldablePropagation` optimizer.



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