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Asked: 2026-06-01T20:32:49+00:00

We have audit trail implemented using triggers on our web application. Those triggers log

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We have audit trail implemented using triggers on our web application. Those triggers log field level updates. So, in a table, if you have 5 column values changed, we have 5 records in the audit trail one for each column with old value and the new value.

Recently we have upgraded to SQL Server 2008. I have been thinking of using the new change data capture feature as it gives a very neat row level update with very less efforts and it’s super-easy to implement. Just wanted to get some opinions from people who have been using change tracking for any caveat or any other real-world useful info on this.

Any advice would be helpful.

Edit :- http://technet.microsoft.com/en-us/magazine/2008.11.sql.aspx?pr=blog

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  1. Editorial Team

    I use CDC in my WPF app. Works very well but I’ve discovered three problems:

    • You need to back-up change tables quite often (I use MERGE statement to add records to historical tables). Because record stays in change table only for about 2-3 days as I found out. Don’t forget to backup cdc.lsn_time_mapping table.
    • You can’t truncate tables with CDC enabled.
    • There is a problem with disabling cdc and reenabling (should be solved in new service pack as MS said). I’ve got this problem only once so it’s not so annoying.

      http://blogs.technet.com/b/claudia_silva/archive/2010/06/04/cdc-cdc-hangs-when-i-try-to-disable-it.aspx

    Anyway, CDC is very useful mechanism which helps me track all changes on database.

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