- 增加 DbFirst DbColumnInfo Position 属性，字段默认位置；

Providers/FreeSql.Provider.PostgreSQL/PostgreSQLDbFirst.cs

@@ -338,6 +338,7 @@ where {loc8.ToString().Replace("a.table_name", "ns.nspname || '.' || c.relname")
                 ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
                 if (ds == null) return loc1;
 
+                var position = 0;
                 foreach (object[] row in ds)
                 {
                     var object_id = string.Concat(row[0]);
@@ -385,7 +386,8 @@ where {loc8.ToString().Replace("a.table_name", "ns.nspname || '.' || c.relname")
                         DbTypeTextFull = sqlType,
                         Table = loc2[object_id],
                         Coment = comment,
-                        DefaultValue = defaultValue
+                        DefaultValue = defaultValue,
+                        Position = ++position
                     });
                     loc3[object_id][column].DbType = this.GetDbType(loc3[object_id][column]);
                     loc3[object_id][column].CsType = this.GetCsTypeInfo(loc3[object_id][column]);