验证是否正确加载了数据

在完成加载操作后，请查询 STL_LOAD_COMMITS 系统表以验证所需文件是否已加载。在同一事务中运行 COPY 命令和加载验证，以便在加载出现问题时可以回滚整个事务。

以下查询将返回用于加载 TICKIT 数据库中的表的条目：

select query, trim(filename) as filename, curtime, status
from stl_load_commits
where filename like '%tickit%' order by query;

 query |         filename          |          curtime           | status
-------+---------------------------+----------------------------+--------
 22475 | tickit/allusers_pipe.txt  | 2013-02-08 20:58:23.274186 |      1
 22478 | tickit/venue_pipe.txt     | 2013-02-08 20:58:25.070604 |      1
 22480 | tickit/category_pipe.txt  | 2013-02-08 20:58:27.333472 |      1
 22482 | tickit/date2008_pipe.txt  | 2013-02-08 20:58:28.608305 |      1
 22485 | tickit/allevents_pipe.txt | 2013-02-08 20:58:29.99489  |      1
 22487 | tickit/listings_pipe.txt  | 2013-02-08 20:58:37.632939 |      1
 22489 | tickit/sales_tab.txt      | 2013-02-08 20:58:37.632939 |      1
(6 rows)