You dif not join the tables "ON" anything, so you result set is every record from table a matched with every record from table b. It's going to be big.
[EMAIL PROTECTED] wrote: >>Description: >> > I think I just found a bug in mysql 3.23.41 (as shipped with > RedHat Linux 7.2 x86). I have a database "tcg" which contains > two tables: "edition" (3 columns, 1 primary key) and "card" > (several columns, about 6500 lines, 1 primary key). I just > started the mysql client (same host) and did: > > mysql> select * from card,edition where cost > 2 order by cost; > ERROR 1030: Got error 28 from table handler > > This is the error I got. "cost" is an INT column in table > "card". > > I should add that "edition" only contains a few rows and > /var/lib/mysql/tcg, containing these both tables, is > just about 1.3 MB in size, so this is nothing fancy. > > Before mysql spilled out this error, it was working > on disk for a minute, CPU load went up into the sky. > I looked onto /tmp at that moment and saw this: > > -rw-rw---- 1 mysql mysql 1024 Jan 21 20:35 #sql531_7a_0.MYI > -rw-rw---- 1 mysql mysql 952995840 Jan 21 20:37 #sql531_7a_0.MYD > > So mysqld was busy filling up my /tmp with nearly > one Gig of data. When /tmp was full, I got the > abovementioned error.. > >>How-To-Repeat: >> > Always reproducible by just repeating the > abovementioned query. > > Funny(?) thing is that if you abort the client so > the socket is closed, mysqlD continues its task > of filling up the temp disk. > >>Fix: >> > > No idea. But I consider this to be a bug, no matter > whether the query is syntactically correct or not. > Maybe used for a DoS attack on a server. > >>Submitter-Id: <submitter ID> >>Originator: Johannes Tevessen >>Organization: >> > [A] KPNQwest Germany * Theodor-Heuss-Str. 43 * D-51149 Köln > [T] +49-2203-97865-538 [F] +49-2203-97865-531 [M] +49-178-5352334 > [E] [EMAIL PROTECTED] [I] www.kpnqwest.de > >>MySQL support: [none | licence | email support | extended email support ] >>Synopsis: DoS: Fills up disk after query >>Severity: serious >>Priority: medium >>Category: mysql >>Class: sw-bug >>Release: mysql-3.23.41 (Source distribution) >>Server: /usr/bin/mysqladmin Ver 8.21 Distrib 3.23.41, for redhat-linux-gnu on i386 >> >Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB >This software comes with ABSOLUTELY NO WARRANTY. This is free software, >and you are welcome to modify and redistribute it under the GPL license > >Server version 3.23.41 >Protocol version 10 >Connection Localhost via UNIX socket >UNIX socket /var/lib/mysql/mysql.sock >Uptime: 18 hours 35 min 39 sec > >Threads: 2 Questions: 291516 Slow queries: 1 Opens: 134 Flush tables: 1 Open >tables: 3 Queries per second avg: 4.355 > >>Environment: >> > >System: Linux aris.dummy.de 2.4.17 #3 Mon Jan 14 00:22:26 CET 2002 i686 unknown >Architecture: i686 > >Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/cc >GCC: Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/specs >Configured with: ../gcc-3.0.3/configure --prefix=/usr >Thread model: single >gcc version 3.0.3 >Compilation info: CC='gcc' CFLAGS='-O2 -march=i386 -mcpu=i686 -D_GNU_SOURCE >-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE' CXX='c++' CXXFLAGS='-O2 -march=i386 >-mcpu=i686 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE' LDFLAGS='' >LIBC: >lrwxrwxrwx 1 root root 13 Aug 20 19:45 /lib/libc.so.6 -> >libc-2.2.3.so >-rwxr-xr-x 1 root root 1276360 Jul 27 01:10 /lib/libc-2.2.3.so >-rw-r--r-- 1 root root 26938980 Jul 27 00:46 /usr/lib/libc.a >-rw-r--r-- 1 root root 178 Jul 27 00:46 /usr/lib/libc.so >Configure command: ./configure i386-redhat-linux --prefix=/usr --exec-prefix=/usr >--bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share >--includedir=/usr/include --libdir=/usr/lib --libexecdir=/usr/libexec >--localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man >--infodir=/usr/share/info --without-debug --without-readline --enable-shared >--with-extra-charsets=complex --with-bench --localstatedir=/var/lib/mysql >--with-unix-socket-path=/var/lib/mysql/mysql.sock --with-mysqld-user=mysql >--with-extra-charsets=all --disable-assember --with-berkeley-db >--enable-large-files=yes --enable-largefile=yes --with-thread-safe-client >--enable-assembler > > >--------------------------------------------------------------------- >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
