问题描述
我不知道这是否是使用代码的正确方法。请帮我解决这个问题。
我正在从数据库中获取记录并在刷新或重新加载页面时将它们显示在页面上。到目前为止，我的桌子上只有 500 条记录。
但是当我重新加载或刷新页面时，在屏幕上显示记录需要将近 40 秒（有时是 1 分钟）。
有时我也会收到错误
在查询过程中失去与 MySQL 服务器的连接
我参考此链接解决上述问题 Error Code: 2013. Lost connection to MySQL server during query。我检查了接受的答案，但这对我不起作用。
我正在使用以下代码
index.php
<table id="workInProgress" class="table table-striped table-bordered display" style="width:100%">
<thead>
<tr class="table-column-heading">
<th>Order no</th>
<th>Lead Owner</th>
<th>Company</th>
<th>Customer</th>
<th>Product</th>
<th>Bank</th>
<th>Remark</th>
<th>Status</th>
<th>Action</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
脚本
注意：我在 index.php 页面上有以下脚本
$('#workInProgress').DataTable( {
initComplete: function (d) {
this.api().columns([7]).every(function () {
var column = this;
var Jobs = $("#table th").eq([d]).text();
var select = $('<select class="drop-down"><option value="">ALL</option></select>')
.appendTo($(column.header()))
.on('change',function () {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search(val ? '^' + val + '$' : '',true,false)
.draw();
});
column.data().unique().sort().each(function (d,j) {
select.append('<option value="' + d + '">' + d + '</option>')
});
});
},language: {
sLengthMenu: "Show _MENU_",// remove entries text
searchPlaceholder: "Search",emptyTable: "No record found",search:""
},"autoWidth": false,"ordering": false,// remove sorting effect from header
"processing": true,// "serverSide": true,"scrollX": true,"pageLength": 25,"paging": true,"ajax": {
"url" : baseUrl + "/Customer_control/workInprocess","type" : "POST"
},"columns": [
{ "data": "orderno" },{ "data": "Lead_owner" },{ "data": "companyname" },{ "data": "customername" },{ "data": "producttype" },{ "data": "bankname" },{ "data": "remark" },{ "data": "is_leadConfirm" },{ "data": "action" }
],"columnDefs": [
{ width: '14%',targets: 0 },{ width: '13%',targets: 1 },targets: 2 },{ width: '10%',targets: 3 },{ width: '8%',targets: 4 },{ width: '12%',targets:5 },{ width: '9%',targets: 6 },targets: 7 },{ width: '14%',targets: 8 }
]
});
控制器
public function workInprocess(){
$order_list=$this->Customer_model->workInprocess_lead();
// Datatables Variables
$draw = intval($this->input->get("draw"));
$start = intval($this->input->get("start"));
$length = intval($this->input->get("length"));
$data['draw'] = 1;
$data['recordsTotal'] = count($order_list);
$data['recordsFiltered'] = count($order_list);
$data['data'] = [];
$i=1;
foreach ($order_list as $key => $row)
{
if ($row->f_filestatus==2) {
$leadConfirm='Submit';
}
else if ($row->f_filestatus==3) {
$leadConfirm='Pending';
}
else if ($row->f_filestatus==4) {
$leadConfirm='PD';
}
else if(($row->f_filestatus==1)|| ($row->f_filestatus==5)){
$leadConfirm='Approved';
}
else{
$leadConfirm='';
}
$action='<select name="pp_fileStatus[]" class="form-control multipleselect">
<option value="" disabled selected>File Status</option>
<option value="8" '. ($row->f_filestatus == "1"?'selected':'').' >Approved</option>
<option value="2" '. ($row->f_filestatus == "2"?'selected':'').' >Submit</option>
<option value="3" '. ($row->f_filestatus == "3"?'selected':'').' >Pendency</option>
<option value="5" '. ($row->f_filestatus == "4"?'selected':'').' >PD</option>
</select>';
$arr_result = array(
"orderno" => $row->order_no.'-'.$row->b_orderno,"Lead_owner" => $row->empfirstname.' '.$row->emplastname,"companyname" => $row->companyname,"customername" => $row->c_firstname.' '.$row->c_lastname,"producttype" => strtoupper($row->producttype),"bankname" => $row->bankname,"remark" => $row->f_remark,"is_leadConfirm" => $leadConfirm,"action" => '<ul class="lbp_actionslist">'.$action.'</ul>'
);
$data['data'][] = $arr_result;
}
//echo "<pre>";
//print_r($data);
echo json_encode($data);
exit;
}
型号
public function workInprocess_lead(){
if($this->session->userdata['login_session']['access_role']==5){
$where="f.f_filestatus NOT IN(1,8,9) AND tbl_lead.leadstatus=1 AND tbl_lead.createby='".$this->session->userdata['login_session']['id']."'";
}
else if($this->session->userdata['login_session']['access_role']==3){
$where="f.f_filestatus NOT IN(1,9) AND tbl_lead.leadstatus=1 AND tbl_lead.createby='".$this->session->userdata['login_session']['id']."' OR f.f_filestatus NOT IN(1,9) AND tbl_lead.leadstatus=1 AND tbl_bankdata.rm_name='".$this->session->userdata['login_session']['id']."'";
}
else{
$where="f.f_filestatus NOT IN(1,9) or f.f_filestatus IS NULL AND tbl_lead.leadstatus=1 ";
}
$result="SELECT *,`tbl_employee`.`firstname` as `empfirstname`,`tbl_employee`.`lastname` as `emplastname` FROM `tbl_lead` LEFT JOIN `tbl_bankdata` ON `tbl_lead`.`c_id`=`tbl_bankdata`.`lead_id` JOIN `tbl_bankname` ON `tbl_bankname`.`b_id`=`tbl_bankdata`.`b_bankname` left join tbl_fileStatus f
on tbl_bankdata.bank_id=f.f_bankid
and f.date_of_created = (
select max(date_of_created)
from tbl_fileStatus f1
where f1.f_bankid = f.f_bankid
) JOIN `tbl_employee` ON `tbl_lead`.`createby`=`tbl_employee`.`id` WHERE ".$where."ORDER BY tbl_lead.date_of_created DESC";
$getQuery= $this->db->query($result);
return $getQuery->result();
}
解决方法
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