[jira] [Resolved] (SPARK-24521) Fix ineffective test in CachedTableSuite

["Xiao Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-24521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li resolved SPARK-24521.
-----------------------------
       Resolution: Fixed
    Fix Version/s: 2.4.0
                   2.3.2

> Fix ineffective test in CachedTableSuite
> ----------------------------------------
>
>                 Key: SPARK-24521
>                 URL: https://issues.apache.org/jira/browse/SPARK-24521
>             Project: Spark
>          Issue Type: Test
>          Components: SQL
>    Affects Versions: 2.3.1
>            Reporter: Li Jin
>            Assignee: Li Jin
>            Priority: Minor
>             Fix For: 2.3.2, 2.4.0
>
>
> test("withColumn doesn't invalidate cached dataframe") in CachedTableSuite doesn't not work because:
> The UDF is executed and test count incremented when "df.cache()" is called and the subsequent "df.collect()" has no effect on the test result. 
> link:
> https://github.com/apache/spark/blob/master/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala#L86



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