Question

Split query results into 3 groups

Asked by: MFredin

Coldfusion 8 & MySql 5

I've been sending large amounts of email to my customers (not spamming) and many ISP's are starting to reject my messages with the error: Remote host said: 452 Too many recipients received this hour. See my other question here.... http://www.experts-exchange.com/Software/Internet_Email/Email/Q_24685171.html

My solution to this problem is to split the mailing over 3 different servers.  The way I'm currently doing the mailing is with a single dynamic query to pull the correct customers for the mailing and then using <cfmail query="myquery"....> to send the mailing.  

My question is, is there anyway using Coldfusion and/or MySql to break my query into 3 separate result groups to be used in 3 separate <cfmail> mailings?  This would allow me to use the main query and send the results using 3 separate mail servers.

Thanks!!


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Asked On
2009-08-27 at 09:06:14ID24687141
Tags

coldfusion

,

mysql

Topics

Cold Fusion Markup Language

,

MySQL Server

,

ColdFusion Application Server

Participating Experts
1
Points
500
Comments
4

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Answers

 

by: azadisaryevPosted on 2009-08-27 at 09:35:52ID: 25200131

you could set different cfmail attributes depending on current query row number:

<cfoutput query="myquery">
<cfif myquery.currentrow MOD 3 is 0>
  <cfset server = 'mail.server1.com'>
<cfelseif myquery.currentrow MOD 2 is 0>
  <cfset server = 'mail.server2.com'>
<cfelse>
  <cfset server = 'mail.server3.com'>
</cfif>
<cfmail server="#server#" ...>
...
</cfmail>
</cfoutput>

Azadi

 

by: azadisaryevPosted on 2009-08-27 at 09:45:22ID: 25200230

you can also use STARTROW and MAXROWS attributes of <cfquery> tag for this:

<cfquery name="myquery" datasource="#application.dsn#">
SELECT image_id, image_file
FROM images
</cfquery>

<cfset startrow = 1>
<cfset maxrows = ceiling(myquery.recordcount/3)>
<cfoutput>startrow: #startrow# | maxrows: #maxrows#<br><br></cfoutput>

<cfloop from="1" to="3" index="x">
      <p>RUN <cfoutput>#x#</cfoutput>:</p>
      <cfoutput query="myquery" startrow="#startrow#" maxrows="#maxrows#">
            <p>id: #image_id# | startrow: #startrow#</p>
      </cfoutput>
      <p>&nbsp;</p>
      <cfset startrow = maxrows*x+1>
      <cfoutput>startrow: #startrow#<br></cfoutput>
</cfloop>

Azadi

 

by: MFredinPosted on 2009-08-27 at 11:00:49ID: 25200971

Thank you so much!  Both answers will work exactly how I need!  

One other quick question.  Is there anyway to hide or encode the cfmail password somehow instead of including it as plain text in my code?  Could someone get access to the passwords this way?

 

by: azadisaryevPosted on 2009-08-27 at 11:11:34ID: 25201059

>> Could someone get access to the passwords this way?

only someone like you who can access .cfm files NOT through a browser.

what i usually do is create variable(s) in Application scope to hold mailservers, usernames and passwords for any mail connections my application may use, then use those in sfmail tags as <cfmail server="#application.mailserver#" ...>

but this is NOT for security considerations, just for usability (i.e. if mail server's creadentials change, there;s only one place i need to edit them)

Azadi

20120131-EE-VQP-002

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