// 오류1
$query = $this->db->query("SELECT * FROM 테이블명");
$row = $query->row(); 
echo $row->name;

// 오류2
$query = $this->db->get('테이블명');
$row = $query->row(); 
echo $row->name;

A PHP Error was encountered
Severity: Notice

Message: Trying to get property of non-object

Filename: controllers/welcome.php

Line Number: 19

// 수정코드1
$query = $this->db->query("SELECT * FROM 테이블명");
$row = $query->row(); 
if ($query->num_rows() > 0)
{
echo $row->username;
}

// 수정코드2
$query = $this->db->get('테이블명');
$row = $query->row(); 
echo $row->name;
if ($query->num_rows() > 0)
{
echo $row->username;
}