Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19444#discussion_r143386555
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala
---
@@ -405,6 +405,11 @@ object CatalogTypes {
* Specifications of a table partition. Mapping column name to column
value.
*/
type TablePartitionSpec = Map[String, String]
+
+ /**
+ * Initialize an empty spec.
+ */
+ lazy val emptyTablePartitionSpec: TablePartitionSpec = Map.empty[String,
String]
--- End diff --
`Map.empty` is already an object, I think we can jus inline it
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