advisor.Rule{Item:"ARG.011", Severity:"L3", Summary:"不要使用负向查询，如：NOT IN/NOT LIKE", Content:"请尽量不要使用负向查询，这将导致全表扫描，对查询性能影响较大。", Case:"select id from t where num not in(1,2,3);", Position:0, Func:func(*advisor.Query4Audit) advisor.Rule {...}}
advisor.Rule{Item:"ARG.014", Severity:"L4", Summary:"IN 条件中存在列名，可能导致数据匹配范围扩大", Content:"如：delete from t where id in(1, 2, id) 可能会导致全表数据误删除。请仔细检查 IN 条件的正确性。", Case:"select id from t where id in(1, 2, id)", Position:0, Func:func(*advisor.Query4Audit) advisor.Rule {...}}
advisor.Rule{Item:"CLA.001", Severity:"L4", Summary:"最外层 SELECT 未指定 WHERE 条件", Content:"SELECT 语句没有 WHERE 子句，可能检查比预期更多的行(全表扫描)。对于 SELECT COUNT(*) 类型的请求如果不要求精度，建议使用 SHOW TABLE STATUS 或 EXPLAIN 替代。", Case:"select id from tbl", Position:0, Func:func(*advisor.Query4Audit) advisor.Rule {...}}
advisor.Rule{Item:"CLA.002", Severity:"L3", Summary:"不建议使用 ORDER BY RAND()", Content:"ORDER BY RAND() 是从结果集中检索随机行的一种非常低效的方法，因为它会对整个结果进行排序并丢弃其大部分数据。", Case:"select name from tbl where id < 1000 order by rand(number)", Position:0, Func:func(*advisor.Query4Audit) advisor.Rule {...}}
advisor.Rule{Item:"CLA.003", Severity:"L2", Summary:"不建议使用带 OFFSET 的LIMIT 查询", Content:"使用 LIMIT 和 OFFSET 对结果集分页的复杂度是 O(n^2)，并且会随着数据增大而导致性能问题。采用“书签”扫描的方法实现分页效率更高。", Case:"select c1,c2 from tbl where name=xx order by number limit 1 offset 20", Position:0, Func:func(*advisor.Query4Audit) advisor.Rule {...}}
"select c1,c2,c3 from t1,t2 join t3 on t1.c1=t2.c1 and t1.c3=t3.c1 where id>1000",
"select sourcetable, if(f.lastcontent = ?, f.lastupdate, f.lastcontent) as lastactivity, f.totalcount as activity, type.class as type, (f.nodeoptions & ?) as nounsubscribe from node as f inner join contenttype as type on type.contenttypeid = f.contenttypeid inner join subscribed as sd on sd.did = f.nodeid and sd.userid = ? union all select f.name as title, f.userid as keyval, ? as sourcetable, ifnull(f.lastpost, f.joindate) as lastactivity, f.posts as activity, ? as type, ? as nounsubscribe from user as f inner join userlist as ul on ul.relationid = f.userid and ul.userid = ? where ul.type = ? and ul.aq = ? order by title limit ?",
CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `customer_list` AS select `cu`.`customer_id` AS `ID`,concat(`cu`.`first_name`,_utf8mb3' ',`cu`.`last_name`) AS `name`,`a`.`address` AS `address`,`a`.`postal_code` AS `zip code`,`a`.`phone` AS `phone`,`city`.`city` AS `city`,`country`.`country` AS `country`,if(`cu`.`active`,_utf8mb3'active',_utf8mb3'') AS `notes`,`cu`.`store_id` AS `SID` from (((`customer` `cu` join `address` `a` on((`cu`.`address_id` = `a`.`address_id`))) join `city` on((`a`.`city_id` = `city`.`city_id`))) join `country` on((`city`.`country_id` = `country`.`country_id`)))
CREATE TABLE `inventory` (
`inventory_id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
`film_id` smallint(5) unsigned NOT NULL,
`store_id` tinyint(3) unsigned NOT NULL,
`inventory_id` mediumint unsigned NOT NULL AUTO_INCREMENT,
`film_id` smallint unsigned NOT NULL,
`store_id` tinyint unsigned NOT NULL,
`last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
