- 增加 ISelect`1.WithSql("select * from user ...") 功能；

Author: 28810

FreeSql.DbContext/FreeSql.DbContext.xml

@@ -369,5 +369,13 @@ public interface ISelect<T1> : ISelect0<ISelect<T1>, T1>, ILinqToSql<T1> where T
         /// <param name="then">即能 ThenInclude，还可以二次过滤（这个 EFCore 做不到？）</param>
         /// <returns></returns>
         ISelect<T1> IncludeMany<TNavigate>(Expression<Func<T1, IEnumerable<TNavigate>>> navigateSelector, Action<ISelect<TNavigate>> then = null) where TNavigate : class;
+
+        /// <summary>
+        /// 实现 select .. from ( select ... from t ) a 这样的功能<para></para>
+        /// 使用 AsTable 方法也可以达到效果
+        /// </summary>
+        /// <param name="sql">SQL语句</param>
+        /// <returns></returns>
+        ISelect<T1> WithSql(string sql);
     }
 }

FreeSql/FreeSql.xml

@@ -329,6 +329,16 @@ public ISelect<T1> WhereCascade(Expression<Func<T1, bool>> exp)
             return this;
         }
 
+        public ISelect<T1> WithSql(string sql)
+        {
+            this.AsTable((type, old) =>
+            {
+                if (type == _tables.First().Table?.Type) return $"( {sql} )";
+                return old;
+            });
+            return this;
+        }
+
         public bool Any(Expression<Func<T1, bool>> exp) => this.Where(exp).Any();
 
         public TReturn ToOne<TReturn>(Expression<Func<T1, TReturn>> select) => this.Limit(1).ToList(select).FirstOrDefault();