Steve, Wednesday, July 10, 2002, 11:12:48 AM, you wrote: SH> Continuing my troubles with AUTO_INCREMENT (which nobody has yet SH> responded to), I've now ruled the Perl DBI out of the equation and SH> reproduced the same problem using the "mysql.exe" command-line tool.
SH> Hopefully somebody will be tempted to help this time now that there is SH> no Perl involved to put people off? SH> The bug can be reproduced as follows: SH> Create the following simple database containing just one BDB table: SH> CREATE DATABASE test; SH> CREATE TABLE foo ( SH> id INT NOT NULL AUTO_INCREMENT, SH> num INT, SH> str VARCHAR(10), SH> PRIMARY KEY (id) SH> ) TYPE=BDB; SH> Now start two "mysql.exe" sessions running with the "-f" flag to ignore SH> errors. SH> Set each one into "no auto-commit" mode with: SH> SET AUTOCOMMIT=0; SH> and then feed each of them the following two lines 50,000 times each: SH> INSERT INTO foo (num, str) VALUES (1, 'a'); SH> COMMIT; [skip] SH> When I inspect the output collected in these log files I find, not SH> unexpectedly, that there are many "deadlock" errors (which I'm quite SH> comfortable with, and can handle in my real software by simply retrying SH> the transaction), but that there are also a few of the following error: SH> Duplicate entry '1' for key 1 SH> Surely this is a bug isn't it? SH> The transaction that is being performed 50,000 times each by the two SH> "mysql.exe" sessions doesn't specify any value for the AUTO_INCREMENT SH> column "id" - it just leaves it up to the database to choose the "next" SH> value. SH> This error suggests that the database has wrongly chosen the value '1', SH> and then (rightly) complains that it is already used! SH> I would really appreciate a response on this one as I'm now at the end SH> of my tether trying to work out what is wrong. Steve, I tested your example with PHP script, but I didn't get any Duplicate entry error ... (I tested with BDB tables and SET AUTOCOMMIT=0). -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Victoria Reznichenko / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net <___/ www.mysql.com --------------------------------------------------------------------- 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
