[jira] [Created] (SPARK-22981) Incorrect results of casting Struct to String

["Takeshi Yamamuro (JIRA)" <ji...@apache.org>]

Takeshi Yamamuro created SPARK-22981:
----------------------------------------

             Summary: 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


{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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