Delta
From RemObjects Software
This is a RemObjects SDK Glossary entry
Feel free to add your notes to this topic below.
A Delta is essentially a collection of DeltaChange / TDADeltaChange items that is bound to one specific data table in a dataset.
When you create an instance of a delta using the constructor with a data table parameter, the Delta class will invoke the method DataTable.GetChanges to retrieve the list of updates made. It will then loop through all these changes and add a new delta change.
Instances of the Delta class are created automatically by the RemoteDataAdapter / TDARemoteDataAdapter when you call to the Update method.
An important aspect of deltas is that they need to have a name; Data Abstract will automatically use the name of the data table contained in an ADO.NET dataset (.NET) or the TDADataTable.LogicalName (Delphi). Deltas without a name cannot be properly streamed or identified by the server.
See Also
- Delta class / IDADelta interface
- DeltaChange / TDADeltaChange classes
Product: RemObjects SDK
Current version: RemObjects SDK 'Vinci' (5.0)
Lists — Glossary — Features — How To — Components — Tools — Samples — Articles — Architecture — Issues
