[#6070] Add Name Name.unqualified()

jOOQ/src/main/java/org/jooq/Name.java

@@ -87,6 +87,11 @@ public interface Name extends QueryPart {
      */
     Name qualifier();
 
+    /**
+     * This name, unqualified.
+     */
+    Name unqualifiedName();
+
     /**
      * The qualified name of this SQL identifier.
      */

jOOQ/src/main/java/org/jooq/impl/QualifiedName.java

@@ -165,6 +165,14 @@ final class QualifiedName extends AbstractName {
         return new QualifiedName(qualifier);
     }
 
+    @Override
+    public final Name unqualifiedName() {
+        if (qualifiedName.length <= 1)
+            return this;
+        else
+            return qualifiedName[qualifiedName.length - 1];
+    }
+
     @Override
     public final String[] getName() {
         String[] result = new String[qualifiedName.length];

jOOQ/src/main/java/org/jooq/impl/UnqualifiedName.java

@@ -94,6 +94,11 @@ final class UnqualifiedName extends AbstractName {
         return null;
     }
 
+    @Override
+    public final Name unqualifiedName() {
+        return this;
+    }
+
     @Override
     public final String[] getName() {
         return new String[] { name };