Is there any way to check before call the $this->db->update() method, Is where condition set or not?

[eluser]Sarwar CSE[/eluser]
Is there any way to check before call the $this->db->update() method is where condition is set or not?

like

Code:

// here i want to check , IS where condition  set or not?...
$this->db->update("table_name");

Please advice me ...