code: public function execute() 
  	{
  		if (is_null($this->conn))
  			throw new SquidException("Can't execute query, implicitly created without connection!");
  		
  		$cmd = $this->assemble();
  		$bind = $this->bind();
  		
  		return $this->conn->execute($cmd, $bind);
  	}
docs: Execute the generated query.
  @return \PDOStatement|null Result generated by the query, or null on fail.
  @throws SquidException