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whow to capture SQL errors in Coldfusion

Posted on 2014-11-06
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Last Modified: 2014-11-29
I have a bunch of queries which insert data into my SQL server and sometimes I get a duplicate record which
throws an error like this

Error Executing Database Query.[Macromedia][SQLServer JDBC Driver][SQLServer]Violation of PRIMARY KEY constraint 'PK_tbl_CNR_D'. Cannot insert duplicate key in object 'dbo.tbl_CNR_D'. The duplicate key value is (C2491035056, 01, 1428310095, ). The specific sequence of files included or processed is: C:\inetpub\wwwroot\parse.cfm, line: 452

how can I capture this in my code and act accordingly ?

I want to avoid to have to fire of a query to see if recordcount GT 0 to avoid this
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Question by:AlexPonnath
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SidFishes earned 500 total points
ID: 40433265
Well you can parse the error in cfcatch.detail, evaluate if it's the duplicate error and then handle it however you want but that really is no "better" than handling it properly in the first place, by checking to see if the id already exists in a query.

There's going to be 2 hits to the db in either case

Call with error > call with corrected id
Call with id check > call to insert

To me it doesn't make sense (and it's a lot more complex) to try to handle the error than avoiding it in the first place.
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Expert Comment

by:Pravin Asar
ID: 40434199
With insert/update query you can add result attribute to check number of rescords being updated.
To avoid duplicates, you may check the existence of record matching the pk or fk.

If record exists, may be you want to run update query.

for example

<cfquery datasource="#request.dsn#" name="saveChanges" result="updateResult">
UPDATE table_name
SET
column1 = '#value1#',
column2 = '#value2#'
WHERE column3 = 1
</cfquery>

<cfset recordsChanged = updateResult.recordCount>
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