Optimized code

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

@@ -73,14 +73,19 @@ namespace SqlSugar
         }
         public virtual string GetPackTable(string sql, string shortName)
         {
-            return UtilMethods.GetPackTable(sql,shortName);
+            return UtilMethods.GetPackTable(sql, shortName);
         }
-        public virtual string GetDefaultShortName() {
+        public virtual string GetDefaultShortName()
+        {
             return "t";
         }
+        public virtual string GetUnionAllSql(List<string> sqlList)
+        {
+            return string.Join("UNION ALL \r\n", sqlList);
+        }
         public virtual void RepairReplicationParameters(ref string appendSql, SugarParameter[] parameters, int addIndex)
         {
-            UtilMethods.RepairReplicationParameters(ref appendSql,parameters,addIndex);
+            UtilMethods.RepairReplicationParameters(ref appendSql, parameters, addIndex);
         }
         #endregion
 

Src/Asp.Net/SqlSugar/Interface/ISqlBuilder.cs

@@ -28,6 +28,7 @@ namespace SqlSugar
         string GetNoTranslationColumnName(string name);
         string GetPackTable(string sql,string shortName);
         string GetDefaultShortName();
+        string GetUnionAllSql(List<string> sqlList);
         void RepairReplicationParameters(ref string appendSql, SugarParameter[] parameters, int addIndex);
     }
 }

Src/Asp.Net/SqlSugar/SqlSugarClient.cs

@@ -310,6 +310,7 @@ namespace SqlSugar
 
         public virtual ISugarQueryable<T> UnionAll<T>(params ISugarQueryable<T>[] queryables) where T : class, new()
         {
+            var sqlBuilder = InstanceFactory.GetSqlbuilder(this.Context.CurrentConnectionConfig);
             Check.Exception(queryables.IsNullOrEmpty(), "UnionAll.queryables is null ");
             int i = 1;
             List<KeyValuePair<string, List<SugarParameter>>> allItems = new List<KeyValuePair<string, List<SugarParameter>>>();
@@ -324,7 +325,7 @@ namespace SqlSugar
                     allItems.Add(new KeyValuePair<string, List<SugarParameter>>(sql, new List<SugarParameter>()));
                 i++;
             }
-            var allSql = string.Join("UNION ALL \r\n", allItems.Select(it => it.Key));
+            var allSql = sqlBuilder.GetUnionAllSql(allItems.Select(it => it.Key).ToList());
             var allParameters = allItems.SelectMany(it => it.Value).ToArray();
             var resulut = this.Queryable<ExpandoObject>().AS(UtilMethods.GetPackTable(allSql, "unionTable"));
             resulut.AddParameters(allParameters);