SQL查询由于某种原因而中断

Question

请考虑以下图片：

当我在coldfusion中运行以下查询时：

<cfquery datasource="mydb" name="qCoulmnInsert">
INSERT INTO 
simplexresults.contactresults_email_account_summary_devices 
(open_desktop_int,
open_other_int,
open_phone_int,
open_tablet_int,
open_webmail_int,  
<!--- FOR Unique Open --->
unique_webMail_int,
unique_tablet_int,
unique_other_int,
unique_phone_int,
unique_desktop_int,
<!--- FOR DATES --->
startdate_dt,
enddate_dt,
date_dt)

VALUES
<!--- loop through your array --->
<cfloop from="1" to="#arrayLen(cfData)#" index="i">
(
<cfif structKeyExists(cfData[i], "open")>
<cfqueryparam CFSQLTYPE="CF_SQL_INTEGER" value="#cfData[i].open.Desktop#">
<cfelse>
NULL
</cfif> ,
<cfif structKeyExists(cfData[i], "open")>
<cfqueryparam CFSQLTYPE="CF_SQL_INTEGER" value="#cfData[i].open.Other#">
<cfelse>
NULL
</cfif> ,


<cfif structKeyExists(cfData[i], "open")>
<cfqueryparam CFSQLTYPE="CF_SQL_INTEGER" value="#cfData[i].open.Phone#">
<cfelse>
NULL
</cfif> ,

  and so on and so forth ...
                   ....

</cfquery>

我收到以下错误：

 Element OPEN.DESKTOP is undefined in a CFML structure referenced as part of an expression.

The error occurred in C:\myfile.cfm: line 55

53 :              (
54 :               <cfif structKeyExists(cfData[i], "open")>
55 :                 <cfqueryparam CFSQLTYPE="CF_SQL_INTEGER" value="#cfData[i].open.Desktop#">
56 :               <cfelse>
57 :                 NULL

我知道它没有为某些结构定义，如下图所示，但我在<cfelse>语句中包含了“NULL”来处理这些情况。我在这里做错了吗？请指教。

但是，对于定义OPEN'S的日期范围，查询运行正常。

正确方式：

<cfif structKeyExists(cfData[i], "open")>
                <cfif  structKeyExists(cfData[i].open,"Desktop")>
                <cfqueryparam CFSQLTYPE="CF_SQL_INTEGER" value="#cfData[i]["open"]["Desktop"]#">
                <cfelse>
                 NULL
                </cfif>
              <cfelse>
                NULL

              </cfif> ,

Answer 1

您认为if语句中提供了“open”，但“Desktop”并不总是可用且未包含在限定语句中。如果换句话说，“桌面”并不总是一个键，但只要定义了“打开”键，你的循环就会一直寻找它。