From e517e3b4dea24e4ff51c6672e39ffe7298daf1d8 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Sat, 12 Aug 2023 16:29:08 +0800
Subject: [PATCH] Synchronization code

---
 .../Abstract/UpdateProvider/UpdateableHelper.cs |  8 ++------
 Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs   | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs b/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
index 9a6c51e24..57d19c7bb 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
@@ -678,11 +678,7 @@ namespace SqlSugar
                 var whereSql = Regex.Replace(sql, ".* WHERE ", "", RegexOptions.Singleline);
                 if (IsExists(sql))
                 {
-                    whereSql = Regex.Match(sql, @"\(EXISTS.+").Value;
-                    if (sql.Contains("((EXISTS")) 
-                    {
-                        whereSql = $"({whereSql}";
-                    }
+                    whereSql = UtilMethods.RemoveBeforeFirstWhere(sql);
                 }
                 dt = this.Context.Queryable<T>().Filter(null, true).Where(whereSql).AddParameters(parameters).ToDataTable();
             }
@@ -724,7 +720,7 @@ namespace SqlSugar
 
         private static bool IsExists(string sql)
         {
-            return sql.Contains("WHERE (EXISTS") || sql.Contains("((EXISTS (");
+            return UtilMethods.CountSubstringOccurrences(sql,"WHERE")>1;
         }
 
         private void ThrowUpdateByExpression()
diff --git a/Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs b/Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs
index ffc0ad0cd..30b904628 100644
--- a/Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs
+++ b/Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs
@@ -18,6 +18,23 @@ namespace SqlSugar
 {
     public class UtilMethods
     {
+        public  static int CountSubstringOccurrences(string mainString, string searchString)
+        {
+            string[] substrings = mainString.Split(new string[] { searchString }, StringSplitOptions.None);
+            return substrings.Length - 1;
+        }
+        public static string RemoveBeforeFirstWhere(string query)
+        {
+            int whereIndex = query.IndexOf("WHERE", StringComparison.OrdinalIgnoreCase);
+            if (whereIndex >= 0)
+            {
+                return query.Substring(whereIndex + "WHERE".Length);
+            }
+            else
+            {
+                return query;
+            }
+        }
         public static List<object> ConvertToListOfObjects(object inValues)
         {
             // 创建一个新的List<object>并逐个将元素转换并添加到其中