From cdf8678f33f8ea49e5291fce4a4651a24edaf19c Mon Sep 17 00:00:00 2001
From: rubenada <rubenql@gmail.com>
Date: Fri, 17 Jul 2020 10:00:52 +0200
Subject: [PATCH] [CALCITE-4127] Remove final from
 AbstractRelNode#getRelTypeName

---
 core/src/main/java/org/apache/calcite/rel/AbstractRelNode.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/src/main/java/org/apache/calcite/rel/AbstractRelNode.java b/core/src/main/java/org/apache/calcite/rel/AbstractRelNode.java
index b55c90dd3c16..7a528d5a6ddc 100644
--- a/core/src/main/java/org/apache/calcite/rel/AbstractRelNode.java
+++ b/core/src/main/java/org/apache/calcite/rel/AbstractRelNode.java
@@ -179,7 +179,8 @@ public void register(RelOptPlanner planner) {
     Util.discard(planner);
   }
 
-  public final String getRelTypeName() {
+  // It is not recommended to override this method, but sub-classes can do it at their own risk.
+  public String getRelTypeName() {
     String cn = getClass().getName();
     int i = cn.length();
     while (--i >= 0) {