Xiao Li created SPARK-22825:
-------------------------------
Summary: Incorrect results of Casting Array to String
Key: SPARK-22825
URL: https://issues.apache.org/jira/browse/SPARK-22825
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.2.1
Reporter: Xiao Li
{code}
val df =
spark.range(10).select('id.cast("integer")).agg(collect_list('id).as('ids))
df.write.saveAsTable("t")
sql("SELECT cast(ids as String) FROM t").show(false)
{code}
The output is like
{code}
+------------------------------------------------------------------+
|ids |
+------------------------------------------------------------------+
|org.apache.spark.sql.catalyst.expressions.UnsafeArrayData@8bc285df|
+------------------------------------------------------------------+
{code}
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