-

Src/Asp.Net/SqlSugar/Abstract/DbMaintenanceProvider/Methods.cs

@@ -234,7 +234,7 @@ namespace SqlSugar
                 this.Context.Updateable(dt)
                              .AS(tableName)
                              .Where($"{columnInfo.DbColumnName} is null ").ExecuteCommand();
-        
+                columnInfo.IsNullable = false;
                 UpdateColumn(tableName, columnInfo);
             }
             return true;