Thanks for the pointers Roger and the example tests. Is it possible to change the VFS SQLite is using while SQLite is running? I'm looking at creating two different VFS implementations and it would be great to be able to switch between implementations as required, I'd be looking to switch VFS during program start-up and before any databases are loaded or used.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roger Binns Sent: Tuesday, November 04, 2008 12:39 PM To: General Discussion of SQLite Database Subject: Re: [sqlite] VFS implementation guidance -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Brown, Daniel wrote: > Are there any guides to implementing a VFS (sqlite3_vfs) for SQLite? A > good practices guide would be as useful. I already have an existing > file system API/library for the target system so I guess it is mostly > just matching up the API with the VFS implementation via some wrapper > functions? Pretty much just implement the functions as documented. One gotcha is that xRandomness is only called once and is only called on the default VFS which makes testing it fun. Another is that xGetLastError is never called so you don't need to implement it. http://www.sqlite.org/cvstrac/tktview?tn=3337 You then need to run queries that exercise all parts of the VFS. If you want some guidance, this is what I use: http://code.google.com/p/apsw/source/browse/apsw/trunk/tests.py#4759 Roger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkkQssUACgkQmOOfHg372QTuLwCgygTWzPSW3CCHnQONXiEcKXf7 5XEAnR7DYzMf+hvXCORi/I/hpWgWF/t3 =3tEY -----END PGP SIGNATURE----- _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
