如何弄清楚为什么MySQL不让我查询视图？

Question

我正在使用MySql 5.6。我正在查询视图并收到此错误

mysql> select * FROM report_toc_item;
ERROR 1356 (HY000): View 'my_db.report_toc_item' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
mysql>

我可以看到视图定义，看起来好像没有什么错

mysql>  SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE table_schema = 'my_db' and TABLE_NAME = 'report_toc_item';
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| VIEW_DEFINITION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| select `ti`.`ID` AS `ID`,`ti`.`PARENT_ID` AS `PARENT_ID`,`ti`.`TOC_ID` AS `TOC_ID`,`ti`.`TITLE` AS `TITLE`,`ti`.`DESCRIPTION` AS `DESCRIPTION`,`ti`.`TYPE_ID` AS `TYPE_ID`,`ti`.`ORDER_NUM` AS `ORDER_NUM`,`ti`.`MY_OBJECT_SEGMENT_ID` AS `MY_OBJECT_SEGMENT_ID`,`ti`.`MY_OBJECT_SEGMENT_ORDER_NUM` AS `MY_OBJECT_SEGMENT_ORDER_NUM`,`ti`.`ELEMENT_ID` AS `ELEMENT_ID`,`ti`.`UNIT_TOC_ITEM_ID` AS `UNIT_TOC_ITEM_ID`,`ti`.`SHORT_NAME` AS `SHORT_NAME`,`ti`.`THIRD_PARTY_PROMPT_ID` AS `THIRD_PARTY_PROMPT_ID`,`pti`.`TYPE_ID` AS `PARENT_TYPE_ID` from (`my_db`.`toc_item` `ti` join `my_db`.`toc_item` `pti` on((`pti`.`ID` = `ti`.`PARENT_ID`))) where ((`ti`.`TYPE_ID` = 'sub_segment') and ((`pti`.`TYPE_ID` = 'lesson') or (`pti`.`TYPE_ID` = 'activity') or (`pti`.`TYPE_ID` = 'activity_practice') or (`pti`.`TYPE_ID` = 'unit_opener'))) |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.01 sec)

如何找出哪些列和表无效？请注意，在运行这两个命令时，我都是以root用户身份登录的。

编辑：这是根据要求“显示创建视图report_toc_item”的结果。

mysql> show create view report_toc_item;
+--------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
| View               | Create View                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | character_set_client | collation_connection |
+--------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+
| report_toc_item | CREATE ALGORITHM=UNDEFINED DEFINER=`myuser`@`localhost` SQL SECURITY DEFINER VIEW `report_toc_item` AS select `ti`.`ID` AS `ID`,`ti`.`PARENT_ID` AS `PARENT_ID`,`ti`.`TOC_ID` AS `TOC_ID`,`ti`.`TITLE` AS `TITLE`,`ti`.`DESCRIPTION` AS `DESCRIPTION`,`ti`.`TYPE_ID` AS `TYPE_ID`,`ti`.`ORDER_NUM` AS `ORDER_NUM`,`ti`.`MY_OBJECT_SEGMENT_ID` AS `MY_OBJECT_SEGMENT_ID`,`ti`.`MY_OBJECT_SEGMENT_ORDER_NUM` AS `MY_OBJECT_SEGMENT_ORDER_NUM`,`ti`.`ELEMENT_ID` AS `ELEMENT_ID`,`ti`.`UNIT_TOC_ITEM_ID` AS `UNIT_TOC_ITEM_ID`,`ti`.`SHORT_NAME` AS `SHORT_NAME`,`ti`.`THIRD_PARTY_PROMPT_ID` AS `THIRD_PARTY_PROMPT_ID`,`pti`.`TYPE_ID` AS `PARENT_TYPE_ID` from (`toc_item` `ti` join `toc_item` `pti` on((`pti`.`ID` = `ti`.`PARENT_ID`))) where ((`ti`.`TYPE_ID` = 'sub_segment') and ((`pti`.`TYPE_ID` = 'lesson') or (`pti`.`TYPE_ID` = 'activity') or (`pti`.`TYPE_ID` = 'activity_practice') or (`pti`.`TYPE_ID` = 'unit_opener'))) | utf8                 | utf8_general_ci      |
+--------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+

编辑2：

这是分配给相关用户的赠款

mysql> show grants for 'myuser'@'localhost';
+-------------------------------------------------+
| Grants for myuser@localhost                |
+-------------------------------------------------+
| GRANT USAGE ON *.* TO 'myuser'@'localhost' |
+-------------------------------------------------+
1 row in set (0.00 sec)

Answer 1

完整的错误消息是：

... or definer/invoker of view lack rights to use them

检查视图定义者，如果有，检查定义者账户是否可以执行select。

要查看定义器，请使用：

SHOW CREATE VIEW

SELECT DEFINER FROM INFORMATION_SCHEMA.VIEWS WHERE ...