MySQL：“布尔模式”下的意外行为
我使用以下调用从数据库获取信息：
select *
from submissions
where
match( description ) against ('+snowboard' in boolean mode )
and (!disabled or disabled='n')
order by datelisted desc limit 30
这意味着找到了描述中带有“snowboard”的所有内容。现在的问题是：
select *
from submissions
where
match( description ) against ('+snowboard +mp4' in boolean mode )
and (!disabled or disabled='n')
order by datelisted desc limit 30
由于某种原因将忽略 +mp4 并返回与第一个查询相同的内容，
select *
from submissions
where
match( description ) against ('+mp4' in boolean mode )
不会返回任何内容，因此基本上它似乎在搜索中被忽略
有人知道如何解决此行为吗？
I use the following call for getting information from a database:
select *
from submissions
where
match( description ) against ('+snowboard' in boolean mode )
and (!disabled or disabled='n')
order by datelisted desc limit 30
Which means everything with ‘snowboard' in the description is found. Now here’s the problem:
select *
from submissions
where
match( description ) against ('+snowboard +mp4' in boolean mode )
and (!disabled or disabled='n')
order by datelisted desc limit 30
will ignore the +mp4 for some reason and return the same as the first query
select *
from submissions
where
match( description ) against ('+mp4' in boolean mode )
doesn't return anything, so basically it appears it's ignored in the search
Does anybody know how to work around this behavior?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
mysql的布尔模式只会匹配超过一定长度的单词。并且
mp4太短。你必须重新编译mysql来更改阈值编辑：事实证明，现在可以通过配置文件设置，请参阅http://dev.mysql.com/doc/refman/5.0/en/fulltext-fine-tuning.html 供进一步参考
mysql's boolean mode will only match words which are longer than a certain length. and
mp4is too short. you'd have to recompile mysql to change the thresholdEDIT: turns out, this can now be set via the config file, see http://dev.mysql.com/doc/refman/5.0/en/fulltext-fine-tuning.html for furhter reference
您的问题是最小字长，默认情况下为 3 个字符。
尝试使用
+snowboard +scooter进行相同的操作，您会发现它有效。 （当然，假设您的数据库中没有踏板车）。请参阅微调 MySQL 全文搜索关于如何更改它：
Your problem is the minimum word length, which by default is 3 characters.
Try the same with
+snowboard +scooterand you will see that it works. (Supposing you don't have scooters in your database, of course).See Fine-Tuning MySQL Full-Text Search on how to change it: