From 4b341436af229887fd39b83e0d59eb6570d503df Mon Sep 17 00:00:00 2001
From: Redkale <8730487+redkale@users.noreply.github.com>
Date: Tue, 7 Jan 2020 11:01:08 +0800
Subject: [PATCH]

---
 src/org/redkale/util/SelectColumn.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/org/redkale/util/SelectColumn.java b/src/org/redkale/util/SelectColumn.java
index 54e73c50d..cc0a2a08f 100644
--- a/src/org/redkale/util/SelectColumn.java
+++ b/src/org/redkale/util/SelectColumn.java
@@ -171,6 +171,10 @@ public class SelectColumn implements Predicate<String> {
         return new SelectColumn(Utility.append(cols, columns), true);
     }
 
+    public boolean isOnlyOneColumn() {
+        return !excludable && columns != null && columns.length == 1;
+    }
+
     @Override
     public boolean test(final String column) {
         if (this.columns != null) {