- 增加 ColumnAttribute Precision/Scale 设置；

FreeSql/DataAnnotations/ColumnAttribute.cs

@@ -104,5 +104,16 @@ namespace FreeSql.DataAnnotations
         /// 注意：如果是 getdate() 这种请可考虑使用 ServerTime，因为它对数据库间作了适配
         /// </summary>
         public string InsertValueSql { get; set; }
+
+        internal int? _Precision;
+        /// <summary>
+        /// decimal/numeric 类型的长度
+        /// </summary>
+        public int Precision { get => _Precision ?? 0; set => _Precision = value; }
+        internal int? _Scale;
+        /// <summary>
+        /// decimal/numeric 类型的小数位长度
+        /// </summary>
+        public int Scale { get => _Scale ?? 0; set => _Scale = value; }
     }
 }

FreeSql/DataAnnotations/ColumnFluent.cs

@@ -176,5 +176,18 @@ namespace FreeSql.DataAnnotations
             _column.InsertValueSql = value;
             return this;
         }
+
+        /// <summary>
+        /// decimal/numeric 类型的长度/小数位长度
+        /// </summary>
+        /// <param name="precision">总长度</param>
+        /// <param name="scale">小数位长度</param>
+        /// <returns></returns>
+        public ColumnFluent Precision(int precision, int scale = 0)
+        {
+            _column.Precision = precision;
+            _column.Scale = scale;
+            return this;
+        }
     }
 }