Re: Access Violation when returning CQL transformation error "too many characters in quer

Hi Mike,

I am using Zoom.Net, and it took a long time before I
created Zoom-C application to reproduce the problem.

Actually in C code I was not able to reproduce Access
Violation error, but addinfo shows incorrect value anyway,
which potentially can  causes memory corruption.
The test code returns:
CQL transformation error (10012) Too many characters in
query (addinfo=H)

instead of expected (addinfo=512)

I've attached the sample code (if you want, it could be
added to zoom tests folder, because I didn't find any sample
code that calling ZOOM_query_cql2rpn).

Let me know, if mailing list doesn't allow to read
attachments, and I will include it in the body of e-mail.  

Regards,
Michael Freidgeim

-----Original Message-----
Date: Tue, 2 Jan 2007 13:48:37 +0000
From: Mike Taylor <mikeindexdata.com>
Subject: [Yazlist] Access Violation when returning CQL
transformation
	error	Too many characters in query
To: "Discussion on the YAZ Z39.50 toolkit"
	<yazlistlists.indexdata.dk>
Message-ID: <17818.25269.401416.595791localhost.localdomain>
Content-Type: text/plain; charset=iso-8859-1

Hi, Michael.  It's not immediately obvious from reading the
code where the problem is.  Please send a minimal ZOOM-C
application that demonstrates the problem, and I'll see what
I can do.

Michael Freidgeim writes:
 > Hello,
 >
 > I am using function ZOOM_query_cql2rpn(ZOOM_query s,
const char *str, ZOOM_connection conn); to pass CQL query 
> When I am passing relatively short query it works
fine.
 > However when I passed long query:
 > (proprty) and (bath.notes = proprty) and (TITLE =
proprty) and (AUTHOR = proprty) and (SUBJECT = proprty) and
(EDITOR = proprty) and (PUBLISHER = proprty)  > 
 > It failed, and when I am retrieving error from
connection(using   
ZOOM_API(int)ZOOM_connection_error(ZOOM_connection c, const
char **cp,const char **addinfo) )
 > It returned cp: CQL transformation error (10012)  >
addinfo: Too many characters in query (addinfo=è...¨¨¨) 
>  > and after this  > An unhandled exception of
type 'System.AccessViolationException'.Additional
information: Attempted to read or write protected memory.
This is often an indication that other memory is corrupt. 
 >
 > It seems that  (addinfo=è...¨¨¨) is not set up
properly in ZOOM_query_cql2rpn, which causes the memory
corruption.
 > Note that yaz-client returns correct error message 
> Can't convert CQL to PQF: Too many characters in query
(addinfo=512)  >  > How can I avoid Access Violation
and return meaningful error message ?
 >
 > Regards,
 > Michael Freidgeim

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Re: Access Violation when returning CQL transformation error "too many characters in quer

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