Question: what's the benifit of compile in database support?

[FKtPp]

So, it is to say that VM package in XEmacs heavily used this kind of database backends? 

----- Original Message ----
From: Stephen J. Turnbull <stephen at xemacs.org>
To: FKtPp <m_pupil at yahoo.com.cn>
Cc: XEmacs Beta List <xemacs-beta at xemacs.org>
Sent: Sunday, November 18, 2007 2:58:21 PM
Subject: Question: what's the benifit of compile in database support?


FKtPp writes:
 > Dear developers,
 > 
 > As the subject said I have a stupid question, what is the advantages
 > of compile in a database support like:
 > 
 > --8<---------------cut here---------------start------------->8---
 > Databases:
 >   Compiling in support for Berkeley database.
 > --8<---------------cut here---------------end--------------->8---
 > 
 > Can I use this in elisp scripts inside XEmacs, If so, how to use it?
 

Yes.  As far as elisp is concerned it's basically just an external
(ie, on-disk) hashtable.  Since you have access to the BDB/dbm
functionality, you can tune it for the mind of access that's most
common.

The PostgreSQL support is much more powerful.

 > Is there any documents/info pages describe this kind of usage?

Not really.  I believe that VM supports keeping information about the
summaries in a dbm or Berkeley db database.






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