This is because of pagination. let me describe model with pagination for showing 100 row in php.
function get_invoiceinfoList($search_keyword,$custID){
$page = 1;
$rows = 100;
$sort = '';
$order = 'asc';
$offset = ($page - 1) * $rows;
if($custID > 0 && $search_keyword == 0){
$search = " and a.customer_id =$custID";
}else{
$search = "and (b.name like '%$search_keyword%' || a.inv_no like '%$search_keyword%')" ;
}
$vQuery=$this->db->query("SELECT a.inv_id,a.inv_no,a.inv_org,a.inv_date,
a.customer_id,a.heading,a.quot_id,a.total_cost as total_amount,
a.paid_amount,(a.total_cost-a.paid_amount)as due_amount,b.name
from sales_invoice a,view_customer_info b
where
a.customer_id = b.customer_id $search order by a.inv_date DESC limit $offset, $rows");
$result = $vQuery->result();
$rows = array();
foreach ($result as $rowData){
array_push($rows, $rowData);
}
$data['rows'] = $rows;
return $data;
}