maropu commented on a change in pull request #28840:
URL: https://github.com/apache/spark/pull/28840#discussion_r443215664
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/LookupCatalog.scala
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@@ -155,4 +155,37 @@ private[sql] trait LookupCatalog extends Logging {
None
}
}
+
+ /**
+ * Extract catalog and function identifier from a multi-part name with the
current catalog if
+ * needed.
+ *
+ * Note that: function is only supported in v1 catalog.
+ */
+ object CatalogAndFunctionIdentifier {
Review comment:
> Actually the sql param is not important.
Sorry, but what does it mean? I made a PR for your branch. Please check my
suggestion: https://github.com/ulysses-you/spark/pull/6
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