feat: Add primitive type with name to UserDefinedType

presto-common/src/main/java/com/facebook/presto/common/type/UserDefinedType.java

@@ -18,7 +18,7 @@
 import static java.util.Objects.requireNonNull;
 
 /**
- * UserDefinedType represents an enum type, or a distinct type.
+ * UserDefinedType represents an enum type, a distinct type, or a primitive type with a name.
  * Type definition is defined by user and is extracted at runtime.
  */
 public class UserDefinedType
@@ -46,4 +46,14 @@ public boolean isDistinctType()
     {
         return representation.isDistinctType();
     }
+
+    public boolean isEnumType()
+    {
+        return representation.isEnum();
+    }
+
+    public boolean isPrimitiveType()
+    {
+        return !representation.isDistinctType() && representation.getTypeSignatureBase().hasStandardType();
+    }
 }

presto-main-base/src/main/java/com/facebook/presto/metadata/FunctionAndTypeManager.java

@@ -861,7 +861,7 @@ protected Type getType(UserDefinedType userDefinedType)
         if (userDefinedType.isDistinctType()) {
             return getDistinctType(userDefinedType.getPhysicalTypeSignature().getParameters().get(0).getDistinctTypeInfo());
         }
-        // Enum type
+        // Enum type or primitive type with name
         return getType(new TypeSignature(userDefinedType));
     }