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Full Discussion: Complex MySQL Query(s)
Top Forums Web Development Complex MySQL Query(s) Post 302454076 by Neo on Friday 17th of September 2010 06:31:37 AM
Old 09-17-2010
We have billions of MySQL queries per month in these forums.

When the logic is in PHP, all is generally well. When the DB logic is complex, we tend to have problems.

There is a huge difference in theory and practice.

Generally speaking, keeping thing simple and stupid (the KISS principle) wins over complexity and clever most every time.

Of course, "to each his own" as they say. I am only talking from my experience of running a lot of third party MySQL/PHP code and what I find best and easiest to debug when a problem arises.
 

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MYSQL2DLF.IN(1) 					  LogReport's Lire Documentation					   MYSQL2DLF.IN(1)

NAME
mysql2dlf - convert mysql logfiles to dlf format SYNOPSIS
mysql2dlf DESCRIPTION
mysql2dlf converts a MySQL query log file to DLF format. Information on MySQL can be found on http://www.mysql.org/. The query log file is defined by the --log[=file] option of mysqld, or the log=file setting in MySQL configuration file. Such a log file looks like e.g. /usr/sbin/mysqld, Version: 3.23.43-debug-log, started with: Tcp port: 3306 Unix socket: /var/run/mysqld/mysqld.sock Time Id Command Argument 011218 15:02:58 1 Connect root@localhost on 1 Query SHOW VARIABLES LIKE 'pid_file' 1 Shutdown 011226 21:35:59 6 Connect joe@localhost on 6 Init DB nmrshiftdb 6 Query SHOW VARIABLES or 42401 Query SELECT bannerID, banner, format, width, height, alt, url FROM banners WHERE act = 'true' AND (keyw = 'fullsize' OR keyw = 'global') The generic database dlf format is described in database.xml. EXAMPLES
To process a log as produced by MySQL: $ mysql2dlf < mysql-log mysql2dlf will be rarely used on its own, but is more likely called by lr_log2report: $ lr_log2report mysql < /var/log/mysql-log NOTES
The parser has been tested for query log files for MySQL 3.23.46 only. BUGS
This converter stores all log files information in one big nested array in memory, before writing. Therefore, memory consumption is linear with the size of the log. SEE ALSO
mysql(1), mysqld(1) VERSION
$Id: mysql2dlf.in,v 1.12 2010/12/05 20:36:45 wraay Exp $ COPYRIGHT
Copyright (C) 2001, 2002 Stichting LogReport Foundation LogReport@LogReport.org This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with http://www.gnu.org/copyleft/gpl.html. AUTHOR
Egon Willighagen <egonw@logreport.org> Lire 2.1.1 2011-12-31 MYSQL2DLF.IN(1)
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