Question

SQL Update Within Loop Not Working

Asked by: firstheartland

OK.

I'm trying to loop through a set of results from a database and then apply apply a formula and update the records.  I'm pretty sure that this WAS WORKING before and now is not.  The SQL Statements are valid and work if I copy and paste them direct into the database.  They seem to not be executing within the loop (which is the big time saver for the data entry person)

I receive no error message.

<cfloop query="MarginToAdjust" >
                
					<!--- Calculate Bonus  ---->
                    <cfif (MarginToAdjust.Gross -  MarginToAdjust.StreetDirect) GTE arguments.maximum>
                    	<cfset newbonus = arguments.normalBonus>
                    <cfelse>
                    	<cfset newbonus = (arguments.percentage / 100) * (MarginToAdjust.Gross - MarginToAdjust.StreetDirect) > 
                        <cfset newbonus = int(newbonus)>
                    </cfif>
 
                    <cfquery name="update" datasource="ComSched" result="result">
                        UPDATE    AgentPayout
                        SET              Bonus = #newbonus#
                        WHERE     (PayoutID = #MarginToAdjust.PayoutID#)                        
                    </cfquery>
					<cfoutput>
					<tr>
                    	<td colspan="9"><cfdump var="#result#"> </td>

                                  
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Asked On
2009-09-21 at 12:37:47ID24749546
Tags

Coldfusion

,

SQL

Topics

ColdFusion Studio

,

Cold Fusion Markup Language

,

SQL Query Syntax

Participating Experts
2
Points
500
Comments
8

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Answers

 

by: _agx_Posted on 2009-09-21 at 12:48:17ID: 25386818

The query seems very simple. So assuming they _were_ executed, if nothing is updated, that suggests the PayoutID's were not found.

I am assuming they were executed based on the dumps you posted.

 

by: _agx_Posted on 2009-09-21 at 12:55:44ID: 25386921

Also, can you expand on what you mean by "...WAS WORKING before and now is not"?  I am wondering if the query is really not updating... or if you're just looking at old results.  So first thing, did you actually verify the values are still unchanged _after_ the UPDATE queries?  

<cfloop query="MarginToAdjust">
....

<!--- run the update --->
<cfquery name="update" datasource="ComSched" result="result">
    UPDATE    AgentPayout
    SET              Bonus = #newbonus#
    WHERE     (PayoutID = #MarginToAdjust.PayoutID#)                        
</cfquery>

<!--- check the new values --->
<cfquery name="update" datasource="ComSched" result="afterUpdateResult">
    SELECT  Bonus
    FROM     AgentPayout
    WHERE  PayoutID = #MarginToAdjust.PayoutID#                        
</cfquery>
<cfdump var="#afterUpdateResult#">

</cfloop>

BTW - It's better NOT to run queries within a loop, if at all possible.  If you really can't avoid it, at least use <cfqueryparam...> . That should help performance by using bind variables.

 

by: firstheartlandPosted on 2009-09-22 at 09:44:04ID: 25394769

I've been told that it's a bad idea to include queries in loops but cannot think of another way to do it.

The statement generated in the dump updates the record if I paste it directly into the SQL server.  However, when executing within the loop it DOES NOT work.

That's why I'm so stumped!

 

by: danrosenthalPosted on 2009-09-22 at 10:37:52ID: 25395383

Gotta start with the basics...Maybe the datasource is pointing to a different database.

Also, try executing the query with hard-coded values and see if that updates.

 

by: _agx_Posted on 2009-09-22 at 12:06:57ID: 25396311

> Gotta start with the basics..

Yep.  Good suggestion in cases like this.  Sometimes we overlook the obvious.

@firstheartland - Did you see my question above about "...WAS WORKING before and now is not"?

 

by: firstheartlandPosted on 2009-09-23 at 09:19:01ID: 25404912

@dan:

I did look. I have other pages within the same application that use the same data source.  They are still working.  

@aqx:

I am pretty sure that we had used the same page with all the same settings and users were able to perform the database adjustments without issues.  That is why I am so confused.

 

by: _agx_Posted on 2009-09-23 at 09:32:07ID: 25405054

Yes, but something is obviously not working now.   The only way to get to the bottom of it is to run some tests. Find out where it is going wrong (like the suggestions I posted above).  You can't assume everything is working (obviously it's not).  You have to run some tests to locate what is breaking the script.

 

by: firstheartlandPosted on 2009-12-22 at 11:51:15ID: 31631588

no resolution has been found, closing question so I may ask a different one.

20120131-EE-VQP-002

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