diff --git a/XCode/DataAccessLayer/Database/SQLite.cs b/XCode/DataAccessLayer/Database/SQLite.cs
index 6aa1e9969..655b7d895 100755
--- a/XCode/DataAccessLayer/Database/SQLite.cs
+++ b/XCode/DataAccessLayer/Database/SQLite.cs
@@ -847,7 +847,7 @@ internal class SQLiteMetaData : FileDbMetaData
     /// <returns></returns>
     public override String DropIndexSQL(IDataIndex index) => $"Drop Index {index.Name}";
 
-    protected override String CheckColumnsChange(IDataTable entitytable, IDataTable dbtable, Boolean onlySql, Boolean noDelete)
+    protected override String CheckColumnsChange(IDataTable entitytable, IDataTable dbtable, Boolean onlySql, Boolean noDelete, XCodeSetting set)
     {
         foreach (var item in entitytable.Columns)
         {
@@ -864,7 +864,7 @@ internal class SQLiteMetaData : FileDbMetaData
         }
 
         // 把onlySql设为true，让基类只产生语句而不执行
-        var sql = base.CheckColumnsChange(entitytable, dbtable, onlySql, true);
+        var sql = base.CheckColumnsChange(entitytable, dbtable, onlySql, true, set);
         if (sql.IsNullOrEmpty()) return sql;
 
         // SQLite 3.35.0 起支持 Drop Column
@@ -879,7 +879,7 @@ internal class SQLiteMetaData : FileDbMetaData
 
             Database.CreateSession().Execute(sql);
 
-            return null;
+            return "";
         }
         if (sql.Contains("Drop Column") && v != null && v >= new Version(3, 35))
         {
@@ -887,11 +887,11 @@ internal class SQLiteMetaData : FileDbMetaData
 
             Database.CreateSession().Execute(sql);
 
-            return null;
+            return "";
         }
 
         var db = Database as DbBase;
-        using var span = db.Tracer?.NewSpan($"db:{db.ConnName}:SetSchema:RebuildTable", sql);
+        using var span = db!.Tracer?.NewSpan($"db:{db.ConnName}:SetSchema:RebuildTable", sql);
 
         var sql2 = sql;
 
@@ -941,7 +941,7 @@ internal class SQLiteMetaData : FileDbMetaData
             throw;
         }
 
-        return null;
+        return "";
     }
     #endregion
 
@@ -965,16 +965,17 @@ internal class SQLiteMetaData : FileDbMetaData
     /// <param name="entitytable"></param>
     /// <param name="dbtable"></param>
     /// <param name="mode"></param>
-    protected override void CheckTable(IDataTable entitytable, IDataTable dbtable, Migration mode)
+    /// <param name="set"></param>
+    protected override void CheckTable(IDataTable entitytable, IDataTable? dbtable, Migration mode, XCodeSetting set)
     {
-        if (dbtable == null && (Database as SQLite).IsMemoryDatabase)
+        if (dbtable == null && (Database as SQLite)!.IsMemoryDatabase)
         {
             if (memoryTables.Any(t => t.TableName.EqualIgnoreCase(entitytable.TableName))) return;
 
             memoryTables.Add(entitytable);
         }
 
-        base.CheckTable(entitytable, dbtable, mode);
+        base.CheckTable(entitytable, dbtable, mode, set);
     }
 
     protected override Boolean PerformSchema(StringBuilder sb, Boolean onlySql, DDLSchema schema, params Object[] values)
diff --git a/XCode/DataAccessLayer/MetaData/DbMetaData_Negative.cs b/XCode/DataAccessLayer/MetaData/DbMetaData_Negative.cs
index c64f94137..6cd067b74 100644
--- a/XCode/DataAccessLayer/MetaData/DbMetaData_Negative.cs
+++ b/XCode/DataAccessLayer/MetaData/DbMetaData_Negative.cs
@@ -69,14 +69,16 @@ internal partial class DbMetaData
     {
         if (mode == Migration.Off) return;
 
-        OnSetTables(tables, mode);
+        var set = XCodeSetting.Current;
+
+        OnSetTables(tables, mode, set);
     }
 
-    protected virtual void OnSetTables(IDataTable[] tables, Migration mode)
+    protected virtual void OnSetTables(IDataTable[] tables, Migration mode, XCodeSetting set)
     {
         var dbExist = CheckDatabase(mode);
 
-        CheckAllTables(tables, mode, dbExist);
+        CheckAllTables(tables, mode, dbExist, set);
     }
 
     private Boolean? hasCheckedDatabase;
@@ -119,7 +121,7 @@ internal partial class DbMetaData
         return dbExist;
     }
 
-    private void CheckAllTables(IDataTable[] tables, Migration mode, Boolean dbExit)
+    private void CheckAllTables(IDataTable[] tables, Migration mode, Boolean dbExit, XCodeSetting set)
     {
         IList<IDataTable>? dbtables = null;
         if (dbExit)
@@ -141,9 +143,9 @@ internal partial class DbMetaData
 
                 // 判断指定表是否存在于数据库中，以决定是创建表还是修改表
                 if (dbtable != null)
-                    CheckTable(item, dbtable, mode);
+                    CheckTable(item, dbtable, mode, set);
                 else
-                    CheckTable(item, null, mode);
+                    CheckTable(item, null, mode, set);
             }
             catch (Exception ex)
             {
@@ -152,7 +154,7 @@ internal partial class DbMetaData
         }
     }
 
-    protected virtual void CheckTable(IDataTable entitytable, IDataTable? dbtable, Migration mode)
+    protected virtual void CheckTable(IDataTable entitytable, IDataTable? dbtable, Migration mode, XCodeSetting set)
     {
         var @readonly = mode <= Migration.ReadOnly;
         if (dbtable == null)
@@ -174,19 +176,30 @@ internal partial class DbMetaData
             var onlyCreate = mode < Migration.Full;
             var sb = new StringBuilder();
 
-            var sql = CheckTableDescription(entitytable, dbtable, mode);
-            if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            if (set.CheckComment)
+            {
+                var sql = CheckTableDescription(entitytable, dbtable, mode);
+                if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            }
 
-            // 先删除索引，后面才有可能删除字段
-            sql = CheckDeleteIndex(entitytable, dbtable, mode);
-            if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            if (set.CheckDeleteIndex)
+            {
+                // 先删除索引，后面才有可能删除字段
+                var sql = CheckDeleteIndex(entitytable, dbtable, mode);
+                if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            }
 
-            sql = CheckColumnsChange(entitytable, dbtable, @readonly, onlyCreate);
-            if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            {
+                var sql = CheckColumnsChange(entitytable, dbtable, @readonly, onlyCreate, set);
+                if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            }
 
-            // 新增字段后，可能需要删除索引
-            sql = CheckAddIndex(entitytable, dbtable, mode);
-            if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            if (set.CheckAddIndex)
+            {
+                // 新增字段后，可能需要删除索引
+                var sql = CheckAddIndex(entitytable, dbtable, mode);
+                if (!sql.IsNullOrEmpty()) Append(sb, ";" + Environment.NewLine, sql);
+            }
 
             if (sb.Length > 0) WriteLog($"DDL模式[{mode}]，请手工修改表[{dbtable.TableName}]：{Environment.NewLine}{sb}");
         }
@@ -197,8 +210,9 @@ internal partial class DbMetaData
     /// <param name="dbtable"></param>
     /// <param name="readonly"></param>
     /// <param name="onlyCreate"></param>
+    /// <param name="set"></param>
     /// <returns>返回未执行语句</returns>
-    protected virtual String CheckColumnsChange(IDataTable entitytable, IDataTable dbtable, Boolean @readonly, Boolean onlyCreate)
+    protected virtual String CheckColumnsChange(IDataTable entitytable, IDataTable dbtable, Boolean @readonly, Boolean onlyCreate, XCodeSetting set)
     {
         var sb = new StringBuilder();
         var etdic = entitytable.Columns.ToDictionary(e => FormatName(e), e => e, StringComparer.OrdinalIgnoreCase);
@@ -279,7 +293,7 @@ internal partial class DbMetaData
                 PerformSchema(sb, @readonly || onlyCreate, DDLSchema.AlterColumn, item, dbf);
 
             //if (item.Description + "" != dbf.Description + "")
-            if (FormatDescription(item.Description) != FormatDescription(dbf.Description))
+            if (set.CheckComment && FormatDescription(item.Description) != FormatDescription(dbf.Description))
             {
                 // 先删除旧注释
                 //if (dbf.Description != null) PerformSchema(sb, noDelete, DDLSchema.DropColumnDescription, dbf);
diff --git a/XCode/Setting.cs b/XCode/Setting.cs
index 21a663368..323b25164 100644
--- a/XCode/Setting.cs
+++ b/XCode/Setting.cs
@@ -73,6 +73,18 @@ public class XCodeSetting : Config<XCodeSetting>
     [Description("反向工程。Off 关闭；ReadOnly 只读不执行；On 打开，仅新建；Full 完全，修改删除")]
     public Migration Migration { get; set; } = Migration.On;
 
+    /// <summary>检查注释。表注释或字段注释，反向工程，默认打开</summary>  
+    [Description("检查注释。表注释或字段注释，反向工程，默认打开")]
+    public Boolean CheckComment { get; set; } = true;
+
+    /// <summary>检查删除索引。反向工程，默认打开</summary>  
+    [Description("检查删除索引。反向工程，默认打开")]
+    public Boolean CheckDeleteIndex { get; set; } = true;
+
+    /// <summary>检查添加索引。反向工程，默认打开</summary>  
+    [Description("检查添加索引。反向工程，默认打开")]
+    public Boolean CheckAddIndex { get; set; } = true;
+
     /// <summary>是否检查索引重复。默认打开</summary>  
     [Description("检查索引重复。默认打开")]
     public Boolean CheckDuplicateIndex { get; set; } = true;