Is the code you use to get the data out in the same charset as the code you use to put the data in ? Both should ideally also match your database setting. Have you tried explicitly setting the connection to UTF8 ?
Just swinging in the dark, here, really. On Sat, Aug 28, 2010 at 8:04 AM, Andreas Iwanowski <namez...@afim.info>wrote: > Has no one encountered this before? There has got to be a solution, and > I still haven't found it... So if you have any input please let me know! > > -----Original Message----- > From: Andreas Iwanowski [mailto:namez...@afim.info] > Sent: Tuesday, August 24, 2010 2:48 PM > To: mysql@lists.mysql.com > Subject: BLOB data gets encoded as utf8! > > Hello everyone! > > I am using an MFC unicode project that uses ODBC to access a MySQL > 5.1.50 database via the MySQL ODBC 5.1.6 driver. > character_set_connection is set to utf8 (Which I believe is the default > for the driver) One of the tables contains two LONGBLOB columns, and the > table default charset is utf-8 (since the application is unicode). > > However, when inserting into the LONGBLOB columns via an INSERT > statement, the data gets corrupted/modified because is incorrectly UTF-8 > encoded. > > My insert statement (simplified) does this: > > INSERT INTO _table_ (Desc, Data) VALUES ('...', '_blobdata_'); > > I have also tried the _binary introducer > (http://dev.mysql.com/doc/refman/5.1/en/string-syntax.html) > > INSERT INTO _table_ (Desc, Data) VALUES ('...', _binary'_blobdata_'); > > I'm escaping 0x00, 0x22, 0x27, and 0x5C, which are the only four that > MySQL requires to be escaped per documentation for BLOB fields, and > according to the MySQL docs columns of any BLOB type use no character > set. > > Here is the problem: I found that, for example, 0xFF gets modified to > 0xC3BF, which is in fact the UTF8 encoding for ASCII/Binary 0xFF. > > Needless to say the data becomes useless. I did, however, determine that > the data is already "corrupted" in the myodbc.log file that the driver > outputs if the option is set, so there is likely a problem with the > driver settings or with the statement itself. > > I cannot be the first one to encounter this issue, so maybe if you have > an idea (or a solution would be even better! :) then please let me know. > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=namez...@afim.info > > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=vegiv...@tuxera.be > > -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel
