cloud-fan commented on a change in pull request #34575:
URL: https://github.com/apache/spark/pull/34575#discussion_r755167684
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileFormat.scala
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@@ -171,6 +171,28 @@ trait FileFormat {
def supportFieldName(name: String): Boolean = true
}
+object FileFormat {
+
+ val FILE_PATH = "file_path"
+
+ val FILE_NAME = "file_name"
+
+ val FILE_SIZE = "file_size"
+
+ val FILE_MODIFICATION_TIME = "file_modification_time"
+
+ val METADATA_NAME = "_metadata"
+
+ val METADATA_STRUCT: DataType = new StructType()
+ .add(StructField(FILE_PATH, StringType))
+ .add(StructField(FILE_NAME, StringType))
+ .add(StructField(FILE_SIZE, LongType))
+ .add(StructField(FILE_MODIFICATION_TIME, LongType))
+
+ // supported metadata columns for hadoop fs relation
+ def FILE_METADATA_COLUMNS: AttributeReference =
MetadataAttribute(METADATA_NAME, METADATA_STRUCT)
Review comment:
since it's a `def` now, how about `def createFileMetadataCol`
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