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Mimer and synchronization from PocketPC?

Mimer and synchronization from PocketPC?

Mimer and synchronization from PocketPC?

Hi.  I'm interested in using Mimer SQL as an embedded database in applications on WinXP and PocketPC.  I've been searching through the documents, but the only reference I've seen to synchronizing tables between the two says something like, "For synchronization ActiveSync is recommended."

I was wondering how this actually worked.  Do you have to write your own synchronization code?  What sort of support does Mimer have built in?  If there's a document about this, please point me at it.

And -- is there any intention to include PalmOS in the list of platforms that Mimer runs on?



RE: Mimer and synchronization from PocketPC?

There is no built-in replication (if that is what you are looking for). However, it is really easy to write a really simple application that transfers changes from the PDA database to/from a central database. This application can run either on the PDA or on machine that hosts the database (or anywhere else that is suitable).

RE: Mimer and synchronization from PocketPC?


Thanks for the info.  Are there any examples of such code anywhere, of the simple synchronization application you spoke about?  I'd be grateful for any pointers, so before I start building my databases I can be aware of any design requirements for the tables and so on.

I imagine this must be a fairly common requirement for database programmers nowadays, so maybe there are other examples of the general principles elsewhere.  I found an article on devx.com which talked about exposing .NET datasets through web services, which could then be used to merge additions.  But it didn't say much about handling deletions and updates.

Anyway, I'd be grateful for any general or specific ideas.

  -- Vik

RE: Mimer and synchronization from PocketPC?

I do not know of any examples. Replication for a specific case is usually not difficult to handle.

Basically, all you need to do is have an extra column that you update whenever you change the data. This column can then be used to find the rows that should be moved back to the central database.

The easiest way is to use procedures for your insert, update, and delete operations. In the procedures you handle the update of the extra column. In the case of delete you keep the row until it has been deleted in the central database. For select operations you would construct a view that does not return the deleted rows.

Hope this helps!

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