From 0c82e810c250d02a7f0e2c634e1c4829d739b9de Mon Sep 17 00:00:00 2001
From: 2881099 <2881099@qq.com>
Date: Wed, 8 Feb 2023 11:47:33 +0800
Subject: [PATCH] =?UTF-8?q?-=20=E4=BC=98=E5=8C=96=20SqlServer=20timestamp?=
 =?UTF-8?q?=20=E8=A1=8C=E7=89=88=E6=9C=AC=E7=9A=84=E6=94=AF=E6=8C=81?=
 =?UTF-8?q?=EF=BC=9B#1412?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 FreeSql/Internal/CommonProvider/UpdateProvider.cs | 2 +-
 FreeSql/Internal/UtilsExpressionTree.cs           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/FreeSql/Internal/CommonProvider/UpdateProvider.cs b/FreeSql/Internal/CommonProvider/UpdateProvider.cs
index 431664d2..780761b4 100644
--- a/FreeSql/Internal/CommonProvider/UpdateProvider.cs
+++ b/FreeSql/Internal/CommonProvider/UpdateProvider.cs
@@ -1144,7 +1144,7 @@ namespace FreeSql.Internal.CommonProvider
                     }
             }
 
-            if (_versionColumn != null)
+            if (_versionColumn != null && _versionColumn.Attribute.CanUpdate)
             {
                 var vcname = _commonUtils.QuoteSqlName(_versionColumn.Attribute.Name);
                 if (_versionColumn.Attribute.MapType == typeof(byte[]))
diff --git a/FreeSql/Internal/UtilsExpressionTree.cs b/FreeSql/Internal/UtilsExpressionTree.cs
index dc178ef9..34c1e7bc 100644
--- a/FreeSql/Internal/UtilsExpressionTree.cs
+++ b/FreeSql/Internal/UtilsExpressionTree.cs
@@ -327,7 +327,7 @@ namespace FreeSql.Internal
                     }
                 }
                 if (colattr.MapType == typeof(string) && colattr.IsVersion == true) colattr.StringLength = 40;
-                if (colattr.MapType == typeof(byte[]) && colattr.IsVersion == true) colattr.StringLength = 16;
+                if (colattr.MapType == typeof(byte[]) && colattr.IsVersion == true) colattr.StringLength = 16; // 8=sqlserver timestamp, 16=GuidToBytes
                 if (colattr.MapType == typeof(byte[]) && colattr.StringLength != 0)
                 {
                     int strlen = colattr.StringLength;