[Firebird-devel] invalid BLOB ID

[Douglas T. <dou...@gm...>]

Hello,

I'm investigating an obscure bug where a client accessing
mon$statement is receiving an "invalid BLOB ID" error.
This happens only when there are statements submitted by clients using
charset NONE. The charset used by the monitoring attachment does not
matter. The contents of mon$sql_text are not important either. The
error is thrown by the server at the first fetch command. The blob
(mon$sql_text) does not need to be fetched. Simply referencing it in a
where clause also causes the error.
This error happens with Firebird 2.5 beta2 and 2.1.3rc2. It does not
happen with 2.5 beta1, 2.1.1 or 2.1.2. So I'd imagine it has something
to do with recent changes. Tested with 64bit Win7 and 32bit XP SP3.
I'm having a hard time reproducing the issue with a simple test-case.
Are there any known issues that can cause this?

>From the release notes I can see the following changes as possible
causes. They've all been included in 2.5b2 and 2.1.3rc2.
http://tracker.firebirdsql.org/browse/CORE-2564
http://tracker.firebirdsql.org/browse/CORE-2482

Of course it could be an entirely different cause. Please advise. Any
clues or pointers greatly appreciated.
Thanks in advance,
-- 
Douglas Tosi
www.sinatica.com