Github user OopsOutOfMemory commented on a diff in the pull request:
https://github.com/apache/spark/pull/3935#discussion_r22640526
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala ---
@@ -181,3 +183,25 @@ case class DescribeCommand(
child.output.map(field => Row(field.name, field.dataType.toString,
null))
}
}
+
+/**
+ * :: DeveloperApi ::
+ */
+@DeveloperApi
+case class DDLDescribeCommand(
+ relation: BaseRelation,
+ override val output: Seq[Attribute],
+ isExtended: Boolean) extends RunnableCommand {
+
+ override def run(sqlContext: SQLContext) = {
+ val rows = new ArrayBuffer[Row]()
+ rows += Row("# col_name", "data_type", "comment")
--- End diff --
@chenghao-intel
ok, I will remove it.
If future support `partition table` here, I will add it like hive does:
```
# Partition Information
# col_name data_type comment
patition_col_name string None
```
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