Codeigniter query - mysql

Question

My Query :
$this->db->select('*');
$this->db->join('pos_item_sales', 'pos_item_sales.item_id = pos_item_infos.item_id');
$this->db->join('pos_batch_infos', 'pos_batch_infos.item_id = pos_item_infos.item_id');
$this->db->where("`pos_item_sales`.`transaction_id` = '$transaction_id' AND (`pos_item_sales`.`item_barcode` = '$term' OR `pos_batch_infos`.`item_mbarcode` = '$term' OR `pos_item_infos`.`item_id` = '$term')");
$query = $this->db->get('pos_item_infos');
echo $this->db->last_query();
its solve my prob but i need like this query :
$term = $this->input->get('term',TRUE);
$this->db->select('*');
$this->db->join('pos_item_sales', 'pos_item_sales.item_id = pos_item_infos.item_id');
$this->db->join('pos_batch_infos', 'pos_batch_infos.item_id = pos_item_infos.item_id');
$this->db->where('pos_item_sales.transaction_id',$transaction_id);
$this->db->where('pos_item_sales.item_barcode',$term);
$this->db->or_where('pos_batch_infos.item_mbarcode',$term);
$this->db->or_where('pos_item_infos.item_id',$term);
$query = $this->db->get('pos_item_infos');
echo $this->db->last_query();
But I need a Query like :
SELECT *
FROM (`pos_item_infos`)
JOIN `pos_item_sales` ON `pos_item_sales`.`item_id` = `pos_item_infos`.`item_id`
JOIN `pos_batch_infos` ON `pos_batch_infos`.`item_id` = `pos_item_infos`.`item_id`
WHERE `pos_item_sales`.`transaction_id` = '11355822927'
AND (`pos_item_sales`.`item_barcode` = '8801962686156'
OR `pos_batch_infos`.`item_mbarcode` = '8801962686156'
OR `pos_item_infos`.`item_id` = '8801962686156')
how i solve this prob pls help because its not include ( ) in my or condition.

Answer 1

if you go through the codeigniter userguide.. you can see that there are 4 ways to call where clause...
All of these does the same things... and your first code is codeigniter style (if incase you are worried that is not) that is the 4th method by codeigniter userguide where you can write your own clauses manually... there is no difference in calling the where function in anyways...
so i would go with your first query
$this->db->select('*');
$this->db->join('pos_item_sales', 'pos_item_sales.item_id = pos_item_infos.item_id');
$this->db->join('pos_batch_infos', 'pos_batch_infos.item_id = pos_item_infos.item_id');
$this->db->where("`pos_item_sales`.`transaction_id` = '$transaction_id' AND (`pos_item_sales`.`item_barcode` = '$term' OR `pos_batch_infos`.`item_mbarcode` = '$term' OR `pos_item_infos`.`item_id` = '$term')");
$query = $this->db->get('pos_item_infos');
echo $this->db->last_query();
which is perfectly fine...

Answer 2

In cases of complex queries i find it easier to just send raw query like this :
$query = "your query";
$result = $this->db->query($query);
Don't forget to escape variables before inserting them to the query like this :
$var = $this->db->escape($var);

Answer 3

$query="SELECT *
FROM pos_item_infos
JOIN pos_item_sales ON pos_item_sales.item_id = pos_item_infos.item_id
JOIN pos_batch_infos ON pos_batch_infos.item_id = pos_item_infos.item_id
WHERE pos_item_sales.transaction_id = ?
AND (pos_item_sales.item_barcode = ?
OR pos_batch_infos.item_mbarcode = ?
OR pos_item_infos.item_id = ?)";
$params=array();
$params[]='11355822927';
$params[]='8801962686156';
$params[]='8801962686156';
$params[]='8801962686156';
$result=$this->db->query($query,$params);
$result=$result->result_array();
print_r($result);
Also, simplify your syntax with USING.
SELECT *
FROM pos_item_infos
JOIN pos_item_sales USING (item_id)
JOIN pos_batch_infos USING (item_id)
WHERE pos_item_sales.transaction_id = ?
AND (pos_item_sales.item_barcode = ?
OR pos_batch_infos.item_mbarcode = ?
OR pos_item_infos.item_id = ?)