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Persistent::MySQL is a persistent class implemented using a MySQL database.

SYNOPSIS

use Persistent::MySQL;
use English; # import readable variable names like $EVAL_ERROR

eval { ### in case an exception is thrown ###

### allocate a persistent object ###
my $emp = new Persistent::MySQL($data_source, $username, $password, $table);

### define attributes of the object ###
$emp->add_attribute(empno, ID, Number, undef, 4);
$emp->add_attribute(ename, Persistent, VarChar, undef, 10);
$emp->add_attribute(job, Persistent, VarChar, undef, 9);
$emp->add_attribute(mgr, Persistent, Number, undef, 4);
$emp->add_attribute(hiredate, Persistent, DateTime, undef);
$emp->add_attribute(sal, Persistent, Number, undef, 7, 2);
$emp->add_attribute(comm, Persistent, Number, undef, 7, 2);
$emp->add_attribute(deptno, Persistent, Number, undef, 2);

### query the datastore for some objects ###
$emp->restore_where(qq{
sal > 1000 and
job = CLERK and
ename LIKE M%
}, "sal, ename");
while ($emp->restore_next()) {
printf "ename = %s, emp# = %s, sal = %s, hiredate = %sn",
$emp->ename, $emp->empno, $emp->sal, $emp->hiredate;
}
};

if ($EVAL_ERROR) { ### catch those exceptions! ###
print "An error occurred: $EVAL_ERRORn";
}

ABSTRACT

This is a Persistent class that uses a MySQL database table to store and retrieve objects. This class can be instantiated directly or subclassed. The methods described below are unique to this class, and all other methods that are provided by this class are documented in the Persistent documentation. The Persistent documentation has a very thorough introduction to using the Persistent framework of classes.

UDF collection for MySQL project contains utility UDFs that are supposed to be built and loaded as shared objects.
Its available functions are HUMANAGE() (which returns the age in years relative to a custom date or NOW()), URLENCODE() and URLDECODE().
Installation:
The simplest way to compile this package is:
1. `cd to the directory containing the packages source code and type `./configure to configure the package for your system. If youre using `csh on an old version of System V, you might need to type `sh ./configure instead to prevent `csh from trying to execute `configure itself.
Running `configure takes awhile. While running, it prints some messages telling which features it is checking for.
2. Type `make to compile the package.
3. Optionally, type `make check to run any self-tests that come with the package.
4. Type `make install to install the programs and any data files and documentation.
5. You can remove the program binaries and object files from the source code directory by typing `make clean. To also remove the files that `configure created (so you can compile the package for a different kind of computer), type `make distclean. There is also a `make maintainer-clean target, but that is intended mainly for the packages developers. If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution.
Enhancements:
- A bug in HUMANAGE() regarding a last adjustment of mon/mday in sll2tm() was fixed.
- A bug in HUMANAGE() in which day() just looped over the first year was fixed.

Zmanda Recovery Manager for MySQL simplifies life of a database administrator who needs an easy to use yet flexible and robust backup and recovery solution for MySQL server. With ZRM for MySQL you can:
- Schedule full and incremental logical or raw backups of your MySQL database
- Perform backup that is the best match for your storage engine and your MySQL configuration
- Get e-mail notification about status of your backups
- Monitor and browse your backups
- Recover database easily to any point in time or to any particular transaction

Skeleton Engine for MySQL is a full framework to plug in a new storage engine. Comes with prebuild autoconf files, and a full framework to plug in your own design.

The AWS, HTTP, Memcache, Nitro, PBXT, and many other engines were put together from the skeleton engine.

To install, grab a copy of the mysql source code and run this:
./configure --with-mysql=/home/brian/mysql-5.1/ --libdir=/usr/local/lib/mysql/
make install

And then inside of MySQL:

mysql> INSTALL PLUGIN skeleton SONAME libskeleton_engine.so;

mysql> CREATE TABLE `d` (`a` varchar(125), b text, primary key(a)) ENGINE=skeleton DEFAULT
CHARSET=latin1;
Query OK, 0 rows affected (0.01 sec)

You will probably need to edit the Makefile.am in the src/ tree if you want to build on anything other then Linux (and the Makefile assumes that the server was not compiled for debug).

MaxDB is a heavy-duty, SAP-certified open source database for OLTP and OLAP usage which offers high reliability, availability, scalability and a very comprehensive feature set. MaxDB by MySQL is targetted for large mySAP Business Suite environments and other applications that require maximum enterprise-level database functionality and complements the MySQL database server.
Today, about 6,000 customer installations are using MaxDB technology globally, including Toyota, Intel, DaimlerChrysler, Braun-Gillette, Bayer, Colgate, Yamaha, and Deutsche Post (the German Post Office).
Main features:
- Reduced cost of your SAP implementation
- Easy configuration and low administration
- Elaborate backup and restore capabilities
- Continuous operation, no scheduled downtimes required
- Designed for large number of users and high workloads
- Scales to database sizes in the terabytes
- High availability through cluster and hot-standby support
- Synchronization Manager to control enterprise-wide data replication
- Easy-to-use graphical database tools
- Available for all enterprise HW/OS platforms
- Supports all major SAP solutions
High performance, availability, operational reliability, scalability, ease of use, and low total cost of ownership are just a few of the demands that enterprise environments place on a DBMS infrastructure. MaxDB helps you meet these demands. It is a powerful, state-of-the-art DBMS built for enterprise usage scenarios.
Some other features of MaxDB;
Description Maximum Value
Database size 32 TB (with 8 KB page size)
Number of files/volumes per database 64...4096, specified by a configuration parameter
File/volume size (data) 518 ...8 GB (dependent on operating system limitations)
File/volume size (log) 16 TB (dependent on operating system limitations)
SQL statement length >= 16 KB (Default value 64 KB, specified by a system variable)
Identifier length 32 characters
Numeric precision 38 places
Number of tables unlimited
Number of columns per table (with KEY) 1024
Number of columns per table (without KEY) 1023
Number of primary key columns per table 512
Number of columns in an index 16
Number of foreign key columns per table 16
Number of columns in an ORDER or a GROUP clause 128
Number of columns in a SELECT statement 1023
Number of columns in an INSERT statement 1024
Number of columns in a result table 1023
Number of join tables in a SELECT statement 64
Number of triggers per Basis table 3
Number of indexes per table 255
Number of referring CONSTRAINT definitions (foreign key dependencies) per table unlimited
Number of references per table unlimited
Number of rows per table limited by database size
Internal length of a table row 8088 Bytes
Total of internal lengths of all primary key columns 1024 Bytes
Total of internal lengths of all foreign key columns 1024 Bytes
Total of internal lengths of all columns belonging to an index 1024 Bytes
Internal length of a LONG column 2 GB
Length of columns in an ORDER or a GROUP clause 1020 Bytes
Nested trigger levels unlimited
Nested subqueries 127
Number of join conditions in a WHERE clause of a SELECT statement 128
Number of correlated columns in an SQL statement 64
Number of correlated tables in an SQL statement 16
Number of parameters in an SQL statement 2000
Enhancements:
- This maintenance release features some important bugfixes.

Qt MySQL Budget project is a GUI that allows the creation of a personal budget.

The basic layout is a month selector, a tab for your allocations (budget), a tab for your expenses, and a tab showing the totals.

It has a very simple design allowing the quick creation and updating of budgets to help individuals plot and track their monthly sending.

Audio::DB::Adaptor::dbi::mysql implements a specific mysql database schema that is compatible with Audio::DB. It inherits from Audio::DB. In addition to implementing the abstract SQL-generating methods of Audio::DB::Adaptor::dbi, this module also implements the data loading functionality of Audio::DB.

The schema uses several tables:

artists This the artists data table. Its columns are:

artist_id artist ID (integer); primary key artist artist name (string); may be null; indexed

albums This is the albums table. Its columns are:

album_id album ID (integer); primary key
album album name (string); may be null; indexed
album_type one of compilation or standard; may be null
total_tracks total songs on album (integer)
year self explanatory, no? (integer)
songs This is the primary songs table. Its columns are:
song_id song ID (integer); primary key
title song title (string)
artist_id artist ID (integer); indexed
album_id album ID (integer)
genre_id genre ID (integer) # may be superceded...see note
track track number (integer)
duration formatted song length (string)
seconds length in seconds (integer)
lyrics song lyrics (long text)
comment ID3 tag comment (text)
bitrate encoded bitrate (integer)
samplerate sample rate (real)
format format of the file (ie MPEG) (string)
channels channels (string)
tag_types type of ID3 tags present (ie ID3v2.3.0) (text)
filename file name (text)
filesize file size in bytes (real)
filepath absolute path (text)
year the year tag for single tracks
(since singles or songs on compilations
each may be different) (integer)
uber_playcount total times the song has been played
uber_rating overall song rating (see "users" below)

Currently, ID3 tags support but a single genre. The genre_id is now stored with the song table. Multiple genres may be assigned via the song_genres join table below. The year is a database denormalization that allows the assignment of years to single tracks not belonging to an album.