suspected bug...
hi i posted this to the newsgroups and got told it was probably a sql parser bug so here goes... if u try to execute a query such as: insert into foo (id,textfield) values (54,'\\fred\\') the query fails if i add a space after the last \\ it works this is a real pain personally cos we use a lot of that stuff :( any workarounds or fixes or whatnots? many thanks oh yah the guy who replied to me on the newsgroup said i should submit this: JElkOiBzcWxwYXJzZXIubGliLnBocCx2IDEuMTUgMjAwMi8wNy8yNiAxODozMDo1OSBsZW05 IEV4 cCAkPGJyIC8+CldoeSBkaWQgd2UgZ2V0IGhlcmU/IDUgNiAxNDY8YnIgLz4KTGVmdG92ZXI6 IOE8 YnIgLz4KQTogNSA2PGJyIC8+ClNRTDogRGF0YWLhemUgcGl6emEgLSBUYWJ1bGthIHNpY2ls aWFu b190YWdlc19tZW51IG5hIGxvY2FsaG9zdCANCklOU0VSVCBJTlRPIHNpY2lsaWFub19jYXRl Z29y eV90YWdlc19tZW51IFZBTFVFUyAoMSwgJ0FudGlwYXN0aScsICdLYWx0ZSBWb3JzcGVpc2Vu Jyk= dunno what thats about but i hope it isnt a screw up or anything lauren --- even if my world is weird its my world - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: suspected bug...
the actual horror story query is: update link set path=insert(path,1,13,'\\test\\test21\\') where person_id = 8 and path like '\\test\\test2\\%' am going slightly dilly :/ --- even if my world is weird its my world -Original Message- From: Keith C. Ivey [mailto:[EMAIL PROTECTED] Sent: Thursday, March 13, 2003 15:27 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: suspected bug... On 13 Mar 2003, at 14:59, lauren wrote: if u try to execute a query such as: insert into foo (id,textfield) values (54,'\\fred\\') the query fails if i add a space after the last \\ it works this is a real pain personally cos we use a lot of that stuff :( You'll have to show us exactly how you're getting the query to MySQL. Are you using PHP? Perl? C? Regardless, I suspect that by the time the SQL gets to MySQL you don't have as many backslashes as you think you do. Constructing strings that have contain backslashes, especially multiple backslashes, and passing them around can be tricky. If you're doing this in PHP: $sql = INSERT INTO foo (id, text_field) VALUES (54, '\\fred\\'); then the string doesn't actually contain double backslashes, only single ones, so it'll be invalid if you pass it to MySQL. You'll need quadruple backslashes in your PHP to end up with double backslashes in your SQL. (And things get even worse if you're using LIKE, which involves yet another level of escaping.) If your backslash-containing strings are file paths, you might consider avoiding the complication and using forward slashes instead. They work fine on Windows in most contexts. -- Keith C. Ivey [EMAIL PROTECTED] Tobacco Documents Online http://tobaccodocuments.org Phone 202-667-6653 - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: suspected bug...
its cool i got the 4 backslashes thing worked out thanks very much for the pointer :) --- even if my world is weird its my world -Original Message- From: Keith C. Ivey [mailto:[EMAIL PROTECTED] Sent: Thursday, March 13, 2003 16:11 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: RE: suspected bug... On 13 Mar 2003, at 15:30, lauren wrote: the actual horror story query is: update link set path=insert(path,1,13,'\\test\\test21\\') where person_id = 8 and path like '\\test\\test2\\%' You still haven't told us how you're sending this query to MySQL, and my advice remains the same. If at all possible, avoid the problem by using forward slashes rather than backslashes in your paths. If that's not possible, carefully work through how many levels of escaping you need to get MySQL to see the final SQL statement as you want it. Note that for the LIKE part of your query you're going to need four backslashes to match a single backslash, which means you likely will be typing eight backslashes at that point in your PHP (or whatever) code. See the documentation: | Note: Because MySQL uses the C escape syntax in strings (for | example, `\n'), you must double any `\' that you use in your | LIKE strings. For example, to search for `\n', specify it as | `\\n'. To search for `\', specify it as `' (the backslashes | are stripped once by the parser and another time when the | pattern match is done, leaving a single backslash to be | matched). http://www.mysql.com/doc/en/String_comparison_functions.html -- Keith C. Ivey [EMAIL PROTECTED] Tobacco Documents Online http://tobaccodocuments.org Phone 202-667-6653 - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: It stoped working, and won't work anymore
I don't know of any changes that happened right at the time that it went down. Now, the box _was_ rooted :-), but I *think* mysql going down was independent of that. Since then I've reinstalled every rpm on the system, so it should be clean. MySQL hangs as I install the rpm for it though as soon as it gets to the stage where it starts mysqld The logs say nothing unfortunately, the mysql log just records that it is starting up. Thanks, Lauren. On Thu, 24 Jan 2002, Gerald Clark wrote: What did you change? And the logs say? Lauren Matheson wrote: I've just bumped into the same problem - a RedHat 6.1 server that ran for 2 years with MySQL-3.22.27-1.i386 rpm's from the mysql site, and the server just died and is having identical behaviour to that describe - hangs on creating tables, mysqladmin stalls.. Any help would be much appreciated! Lauren Matheson - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
RE: It stoped working, and won't work anymore
I've just bumped into the same problem - a RedHat 6.1 server that ran for 2 years with MySQL-3.22.27-1.i386 rpm's from the mysql site, and the server just died and is having identical behaviour to that describe - hangs on creating tables, mysqladmin stalls.. Any help would be much appreciated! Lauren Matheson - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
