Close connection

You can use this line after your query

$this->output->delete_cache('path');

Dude, your reply is completely irrelevant to the question. 

That's for output, not for queries. You're just spamming your website.

Sorry i was be confused
My big problem is cache query

No, that comment is not for you. It's for XtreemDeveloper.

Have you tried my answer? Hope it helps you.

Thank you
Yes i tried it but it is looklike database caching
It means that output cache delete all files in folder no special file
Actually i want to remove special file
Please let me more explain :
I have many hotels that user search it for each hotel
And i cache their ,example cache query for hotel id with 1 or 2 or 3
Now maybe i change hotel name with id 3
So i force codeigniter to remove cache for hotel id 3 file not all files
Maybe?