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Using InterBase Change Views


With Change Views, you have this patented method to work with that is a lot easier to develop and scale for your customer base. Using InterBase Change Views, you can now identify specifically what deltas have changed at the field level.

Change views are a subscription based model used to subscribe to some data and identify what data has changed in your InterBase database.  You create a subscription that covers different tables and columns and allow users the rights to subscribe to changes in the data.

During a connection, you can get an alert and then fetch your delta changes or use an TFDEventAlerter component in Delphi/C++Builder and even color code specific changes. For spanning a connection, you don’t have to be connected for it to record the changes. Once you start a database transaction you can have a subscription active then disconnect from your database and then start a new connection with a new transaction at a future point in time.

With Change Views, you :

  • Reduce costs and disk I/O by minimizing data syncs
  • Have little impact on performance
  • No external log tables
  • Scalability of users, even mobile ones
  • Track changes the way you want

Implementing Change Views with FireDAC

Check out this short 4 minute video on using Change Views and how you can start tracking data changes.

If you want to try out using Change Views, you can take a look at the Generic Change Views sample application I demonstrated above that ships with Delphi. 


C:UsersPublicDocumentsEmbarcaderoStudio21.0SamplesObject PascalDatabaseFireDACSamplesDBMS SpecificInterBaseChangeViewGeneric

For C++, you can find our Pharmacy POC that also demonstrates using Change Views to track users and prescriptions:

C:UsersPublicDocumentsEmbarcaderoStudio21.0SamplesCPPDatabaseFireDACSamplesDBMS SpecificInterBaseChangeView


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