maropu commented on a change in pull request #28840:
URL: https://github.com/apache/spark/pull/28840#discussion_r442020636
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/LookupCatalog.scala
##########
@@ -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: now function is only supported in v1 catalog.
+ */
+ object CatalogAndFunctionIdentifier {
+ def unapply(nameParts: Seq[String]): Some[(CatalogPlugin,
FunctionIdentifier)] = {
+
+ if (nameParts.length == 1 &&
catalogManager.v1SessionCatalog.isTempFunction(nameParts.head)) {
+ return Some(currentCatalog, FunctionIdentifier(nameParts.head))
+ }
+
+ nameParts match {
+ case SessionCatalogAndIdentifier(catalog, ident) =>
+ if (nameParts.length == 1) {
+ // If there is only one name part, it means the current catalog is
the session catalog.
+ // Here we don't fill the default database, to keep the error
message unchanged for
+ // v1 commands.
+ Some(catalog, FunctionIdentifier(nameParts.head, None))
+ } else {
+ ident.namespace match {
+ case Array(db) => Some(catalog, FunctionIdentifier(ident.name,
Some(db)))
+ case _ =>
+ throw new AnalysisException(s"Unsupported function name
'$ident'")
+ }
+ }
+
+ case _ => throw new AnalysisException(s"Function command is only
supported in v1 catalog")
Review comment:
nit: drop `s` in the head.
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