On Thu, Jul 12, 2012 at 03:05:39PM +0200, OBones scratched on the wall:
Hello again.
Does anyone have any suggestion here?
There is a footnote in Using SQLite (Chapter 10: Virtual Tables and
Modules, p242) on this.
The text is:
If you do need to support your own transactions, it is important to
keep the program flow in mind. xBegin() will always be the first
function called.** Typically, there will be calls to xUpdate()
followed by a two-step sequence of calls to xSync() and xCommit().
[...]
** In theory. Currently, calls are made directly to xSync() and
xCommit()following the call to xCreate(). It isn't clear if
this is considered a bug or not, so this behavior may change
in future versions of SQLite.
Using SQLite was written before 3.7 was released, so this isn't a
new thing. Overall, I'd call this a documentation bug, as the
behavior makes sense to me. The system can't call xBegin() before
xCreate(), yet creating the table is likely to be a transaction-based
operation (just like xUpdate()). Calling xBegin() after doesn't make
sense either.
I'd try to work around it in a way that will still work correctly
if it is changed. A simple in transaction flag would allow these
calls to short-cut out.
Using SQLite: http://shop.oreilly.com/product/9780596521196.do
-j
I'm pushing my experiment with virtual tables a bit further by
trying out the transaction functions.
As a result, I gave values for the xBegin, xSync, xCommit and
xRollback members of my sqlite3_module structure.
Then after having registered the module, I sent those two statements:
CREATE VIRTUAL TABLE SomeTable USING test(a INTEGER);
INSERT INTO SomeTable VALUES (50);
via appropriate calls to sqlite3_exec
However, this fails quite badly because the xSync function is
called outside any transaction that would have been started by a
call to xBegin.
Basically, xBegin is never called in my simple test, despite the
documentation saying that this should not happen.
What have I done wrong here?
Any suggestion is most welcome
Regards
Olivier
___
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
--
Jay A. Kreibich J A Y @ K R E I B I.C H
Intelligence is like underwear: it is important that you have it,
but showing it to the wrong people has the tendency to make them
feel uncomfortable. -- Angela Johnson
___
sqlite-users mailing list
sqlite-users@sqlite.org
http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
