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https://issues.apache.org/jira/browse/SPARK-22981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-22981.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.3.0
Issue resolved by pull request 20176
[https://github.com/apache/spark/pull/20176]
> Incorrect results of casting Struct to String
> ---------------------------------------------
>
> Key: SPARK-22981
> URL: https://issues.apache.org/jira/browse/SPARK-22981
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.1
> Reporter: Takeshi Yamamuro
> Assignee: Takeshi Yamamuro
> Fix For: 2.3.0
>
>
> {code}
> scala> val df = Seq(((1, "a"), 0), ((2, "b"), 0)).toDF("a", "b")
> df: org.apache.spark.sql.DataFrame = [a: struct<_1: int, _2: string>, b: int]
> scala> df.write.saveAsTable("t")
>
>
> scala> sql("SELECT CAST(a AS STRING) FROM t").show
> +-------------------+
> | a|
> +-------------------+
> |[0,1,1800000001,61]|
> |[0,2,1800000001,62]|
> +-------------------+
> {code}
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