MySQL Function and CodeIgniter Active Record - mysql

Question

CodeIgniter Active Record is easy, well documented and powerful. But when I try to insert MySQL built in functions CONCAT, NOW, GROUP_CONCAT, DATEDIFF, TRIM etc or my custom functions it is giving errors. The following code works fine...
$result = $this->db->select('p.first_name, p.last_name, p.mobile_number, p.email_address')->from('profile p')->get()->result();
But When I want to contact first_name and last_name and use MySQL CONCAT function like this...
$result = $this->db->select('CONCAT(p.first_name, " ", p.last_name) fullname, p.mobile_number, p.email_address')->from('profile p')->get()->result();
It is showing database errors
A Database Error Occurred
Error Number: 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '", `p`.`last_name)` fullname, `p`.`mobile_number`, `p`.`email_address` FROM (`pr' at line 1
SELECT CONCAT(p.first_name, `"` ", `p`.`last_name)` fullname, `p`.`mobile_number`, `p`.`email_address` FROM (`profile` p)
Filename: D:\xampp\htdocs\example\system\database\DB_driver.php
Line Number: 330
Is there a any way to insert MySQL Functions inside CodeIgniter Active Record? Hope I am clear. Thanks in advance.

Answer 1

Since I don't know your exact error:
From user_guide:
$this->db->select() accepts an optional second parameter. If you set it to FALSE, CodeIgniter will not try to protect your field or table names with backticks. This is useful if you need a compound select statement.
$result = $this->db->select('CONCAT(p.first_name, " ", p.last_name) fullname, p.mobile_number, p.email_address', FALSE)->from('profile p')->get()->result();

Answer 2

Place you "select " in array
$this->db->select(array('CONCAT(p.first_name, " ", p.last_name) fullname, p.mobile_number, p.email_address'))
by.

Answer 3

For the case of update using active records you can use
$this->db->set("date_read", "NOW()", FALSE);
Will output something like this
`SET `date_read` = NOW(),

Answer 4

FIXED THE ISSUE
adding the field names in active record array can fix this problem. inside array you can use any mysql functions. the fix of above.
MySQL Table :
fullname mobile_number email_address
------------------- ------------- ------------------------------
sitaramaiah javvadi 9989403339 gnt.sitaramaiah#mstonline.in
raja kumar guthula 9949526012 gnt.rajkumar#mstonline.in
chandra sekhar k.l 9912144556 gnt.sekhar#mstonline.in
khadar basha 98884884584 khadar333332#gmail.com
super administrator 9841866445 admin#gmail.com
CodeIgniter Active Record :
$result = $this->db->select(array('CONCAT(p.first_name, " ", p.last_name) `fullname`', 'p.mobile_number', 'p.email_address'))->from('profile `p`')->get()->result();
echo '<pre>';
print_r($result);
Output :
Array
(
[0] => stdClass Object
(
[fullname] => sitaramaiah javvadi
[mobile_number] => 9989403339
[email_address] => gnt.sitaramaiah#mstonline.in
)
[1] => stdClass Object
(
[fullname] => raja kumar guthula
[mobile_number] => 9949526012
[email_address] => gnt.rajkumar#mstonline.in
)
[2] => stdClass Object
(
[fullname] => chandra sekhar k.l
[mobile_number] => 9912144556
[email_address] => gnt.sekhar#mstonline.in
)
[3] => stdClass Object
(
[fullname] => khadar basha
[mobile_number] => 98884884584
[email_address] => khadar333332#gmail.com
)
[4] => stdClass Object
(
[fullname] => super administrator
[mobile_number] => 9841866445
[email_address] => admin#gmail.com
)
)