Close connection

You can use this line after your query

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

Can i use output cache for database?
But my cache is for database
For each query,codeigniter save file in special folder
Actually in segment country/list folder save all caches file
And i need delete special file
Example
$this->db->query('select * from data where id = 1'); => file name is 12asf1af124123123123
$this->db->query('select * from data where id = 2'); => file name is 12asf1afsdfsdfdsf323123

I need delete 12asf1afsdfsdfdsf323123 file not all files in folder