HyukjinKwon commented on a change in pull request #24176: [SPARK-27233] [SQL]DF
schema should match with table schema when converted to table
URL: https://github.com/apache/spark/pull/24176#discussion_r268386878
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayType.scala
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@@ -90,7 +90,7 @@ case class ArrayType(elementType: DataType, containsNull:
Boolean) extends DataT
override def sql: String = s"ARRAY<${elementType.sql}>"
override private[spark] def asNullable: ArrayType =
- ArrayType(elementType.asNullable, containsNull = true)
+ ArrayType(elementType.asNullable, containsNull)
Review comment:
For instance, when dataframe are loaded via file format sources like
parquet, orc, etc., schema is forced to billable schema, which seems wrong. We
should fix it across SparkSQL
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