[freetds] Problem retrieveing results from a query withan IMAGE field
ZIGLIO, Frediano, VF-IT
Frediano.Ziglio at vodafone.com
Thu Jun 5 09:29:05 EDT 2008
> Il giorno mer, 04/06/2008 alle 15.05 -0300, Daniel A. Veiga
> ha scritto:
> > This is the TDSDUMP log generated for the same program I sent the
> > unixODBC log file for. I hope it helps ...
> > Daniel
> it helps, it helps :)
> The code which cause the problem is in _SQLFetch
> /* TODO change when we code cursors support... */
> /* stop looping, forward cursor support only one row */
> num_rows = 1;
> well.. this tell to stop processing rows if an unbinded
> column is found.
> This is done to allow getting results using SQLGetData
> however we send a
> cursor fetch for 20 rows so in this case we have still to read 19 rows
> when SQLFetchScroll returns :(
> Well... for forward only cursors this is correct for perhaps
> for cursors
> is not... I think the correct processing should be fetch all
> 20 rows or
> request only a row (I think the last is the most probable)...
> I'll have
> to test.
commenting num_rows = 1 line seems to fix the problem. Under ODBC 2
SQLFetch returns only a row and does not take into account fetched_ptr,
array_size and status_ptr.
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