How to reset active record database query?

[eluser]noTime[/eluser]
Your code simply keeps overwriting query clauses until the query gets sent ($this->CI->db->get()). You should do consecutive get() calls OR, if your $this->_table_name is the same everywhere, put all row IDs into an array and do a single get() call:

Code:

$this->CI->db->where_in('which_reply', $row_ids);
$this->CI->db->get('some_table');