>Description:
On a windows or linux system where the time is set to local time, the
function from_unixtime incorrectly applies the offset from UTC to Local to
the result. For example when set to EST, "select from_unixtime(0);"
returns "1969-12-31 19:00:00". In fact, section 6.3.4 of the MySql manual
was generated using a system set to a local one hour ahead of UTC.
This can be demonstrated on multiple versions of 3.23.xx and 4.0.10-gamma.
>How-To-Repeat:
1) set the computer clock to localtime on a window system or set the TZ
variable to display localtime.
2) issue "select from_unixtime(0);" using any database
>Fix:
None known. Floating point values representing time to fractions of a
second cannot be properly interpreted across replicated servers in multiple
timezones.
>Submitter-Id:
>Originator: Jim Heedles
>Organization:
Spaceflight Systems Corporation
>MySQL support: none
>Synopsis: from_unixtime incorrectly applies localtime correction
>Severity: serious
>Priority: low
>Category: mysql
>Class: sw-bug
>Release: mysql-3.23.55 (Official MySQL RPM)
>Server: /usr/bin/mysqladmin Ver 8.23 Distrib 3.23.55, for pc-linux on
i686
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 3.23.55-Max
Protocol version 10
Connection Localhost via UNIX socket
UNIX socket /var/lib/mysql/mysql.sock
Uptime: 14 min 14 sec
Threads: 1 Questions: 6 Slow queries: 0 Opens: 6 Flush tables: 1 Open
tables: 0 Queries per second avg: 0.007
>Environment:
<machine, os, target, libraries (multiple lines)>
System: Linux SSC-RSG1.ssc-nh.com 2.4.18-4 #1 Thu May 2 18:47:38 EDT 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/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)
Compilation info: CC='gcc' CFLAGS='-O6 -fno-omit-frame-pointer -mpentium'
CXX='gcc' CXXFLAGS='-O6 -fno-omit-frame-pointer
-felide-constructors -fno-exceptions -fno-rtti -mpentium'
LDFLAGS=''
LIBC:
lrwxrwxrwx 1 root root 13 Sep 16 07:17 /lib/libc.so.6 ->
libc-2.2.5.so
-rwxr-xr-x 1 root root 1260480 Apr 15 2002 /lib/libc-2.2.5.so
-rw-r--r-- 1 root root 2310808 Apr 15 2002 /usr/lib/libc.a
-rw-r--r-- 1 root root 178 Apr 15 2002 /usr/lib/libc.so
Configure command: ./configure '--disable-shared'
'--with-mysqld-ldflags=-all-static' '--with-client-ldflags=-all-static'
'--without-berkeley-db' '--without-innodb' '--enable-assembler'
'--enable-local-infile' '--with-mysqld-user=mysql'
'--with-unix-socket-path=/var/lib/mysql/mysql.sock' '--prefix=/'
'--with-extra-charsets=complex' '--exec-prefix=/usr'
'--libexecdir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share'
'--localstatedir=/var/lib/mysql' '--infodir=/usr/share/info'
'--includedir=/usr/include' '--mandir=/usr/share/man'
'--with-comment=Official MySQL RPM' 'CC=gcc' 'CFLAGS=-O6
-fno-omit-frame-pointer -mpentium' 'CXXFLAGS=-O6 -fno-omit-frame-pointer
-felide-constructors -fno-exceptions -fno-rtti -mpentium'
'CXX=gcc'
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