Update mysql

Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/UpdateBuilder.cs

@@ -424,7 +424,7 @@ namespace SqlSugar
             {
                 return LambdaExpressions.DbMehtods.GetDate();
             }
-            else if (this.ReSetValueBySqlExpListType!=null&&this.ReSetValueBySqlExpList != null && this.ReSetValueBySqlExpList.ContainsKey(columnInfo.PropertyName)) 
+            else if (IsListSetExp(columnInfo)|| IsSingleSetExp(columnInfo))
             {
                 return this.ReSetValueBySqlExpList[columnInfo.PropertyName].Sql;
             }
@@ -486,6 +486,17 @@ namespace SqlSugar
                 return name + "";
             }
         }
+        private bool IsSingleSetExp(DbColumnInfo columnInfo) 
+        {
+            return this.ReSetValueBySqlExpList != null && 
+                this.ReSetValueBySqlExpList.ContainsKey(columnInfo.PropertyName) && 
+                this.IsListUpdate == null&& 
+                DbColumnInfoList.GroupBy(it => it.TableId).Count()==1;
+        }
+        private bool IsListSetExp(DbColumnInfo columnInfo)
+        {
+            return this.ReSetValueBySqlExpListType != null && this.ReSetValueBySqlExpList != null && this.ReSetValueBySqlExpList.ContainsKey(columnInfo.PropertyName);
+        }
         //public virtual string GetDbColumn(DbColumnInfo columnInfo, string name)
         //{
         //    if (columnInfo.UpdateServerTime)

Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlUpdateBuilder.cs

@@ -97,8 +97,25 @@ namespace SqlSugar
                 batchUpdateSql.Replace("${0}",format);
                 batchUpdateSql.Append(";");
             }
+            batchUpdateSql = GetBatchUpdateSql(batchUpdateSql);
             return batchUpdateSql.ToString();
         }
+
+        private StringBuilder GetBatchUpdateSql(StringBuilder batchUpdateSql)
+        {
+            if (ReSetValueBySqlExpListType == null && ReSetValueBySqlExpList != null)
+            {
+                var result = batchUpdateSql.ToString();
+                foreach (var item in ReSetValueBySqlExpList)
+                {
+                    var dbColumnName = item.Value.DbColumnName;
+                    result = result.Replace($"T.{dbColumnName}", item.Value.Sql.Replace(dbColumnName, "S." + dbColumnName));
+                    batchUpdateSql = new StringBuilder(result);
+                }
+            }
+
+            return batchUpdateSql;
+        }
         int i = 0;
         public  object FormatValue(object value,string name)
         {