From 0d4d3604e1d195bb0b27cc29f8ed1588f1d997cc Mon Sep 17 00:00:00 2001
From: Dongjoon Hyun <dhyun@apple.com>
Date: Thu, 30 Jan 2020 17:04:42 -0800
Subject: [PATCH] [SPARK-30192][SQL][FOLLOWUP] Rename SINGLETON to INSTANCE

---
 .../org/apache/spark/sql/connector/catalog/TableChange.java   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableChange.java b/sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableChange.java
index 58a592c9d530f..5ce020912f213 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableChange.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableChange.java
@@ -298,7 +298,7 @@ public int hashCode() {
   interface ColumnPosition {
 
     static ColumnPosition first() {
-      return First.SINGLETON;
+      return First.INSTANCE;
     }
 
     static ColumnPosition after(String column) {
@@ -312,7 +312,7 @@ static ColumnPosition after(String column) {
    * be the first one within the struct.
    */
   final class First implements ColumnPosition {
-    private static final First SINGLETON = new First();
+    private static final First INSTANCE = new First();
 
     private First() {}