Update of manual

The following list describes some useful sections of the manual:

@itemize @bullet

@item

To get information about the company behind MySQL, see @xref{What is MYSQL AB}.

@item

For a discussion of @strong{MySQL}'s capabilities, see @ref{Features}.

@strong{MySQL}, the most popular Open Source SQL database, is provided

by @strong{MySQL AB}.  @strong{MySQL AB} is a commercial company that

builds is business providing services around the @code{MySQL} database.

builds is business providing services around the @strong{MySQL} database.

@xref{What is MySQL AB}.

@table @asis

@item

Handles large databases.  We are using @strong{MySQL} with some

databases that contain 50,000,000 records and we know of users that

uses @code{MySQL} with 60,000 tables and about 5,000,000,000 rows

uses @strong{MySQL} with 60,000 tables and about 5,000,000,000 rows

@item

All columns have default values.  You can use @code{INSERT} to insert a

CFLAGS="-O6 -mpentiumpro -mstack-align-double" CXX=gcc CXXFLAGS="-O6 -mpentiumpro -mstack-align-double -felide-constructors -fno-exceptions -fno-rtti"

@end multitable

In most cases you can get a resonable optimal @code{MySQL} binary

In most cases you can get a resonable optimal @strong{MySQL} binary

picking the options from the above and add the following options to the

configure line: 

We have also tested @strong{MySQL} on Linux Version 2.4 on a 2 CPU machine and

@strong{MySQL} scales MUCH better on this!  If your plan to set up a

dedicated Linux SMP machine to run @code{MySQL} under heavy load, we

dedicated Linux SMP machine to run @strong{MySQL} under heavy load, we

recommend that you give Version 2.4 a try!

The current implementation of mutex in Linuxthreads is also very bad for

In some cases you may want to have many different @code{mysqld} deamons

(servers) running on the same machine.  You may for example want to run

a new version of @code{MySQL} for testing together with an old version

a new version of @strong{MySQL} for testing together with an old version

that is in production.  Another case is when you want to give different

users access to different mysqld servers that they manage themself.

earlier @strong{MySQL} versions, @code{FLOAT(precision)} always has 2 decimals.

Note that using @code{FLOAT} may give you some unexpected problems as

all calculation in @code{MySQL} is done with double precision.

all calculation in @strong{MySQL} is done with double precision.

@xref{No matching rows}.

@cindex ODBC compatibility

@item

If you use @code{GROUP BY}, the output rows will be sorted according to the

@code{GROUP BY} as if you would have had an @code{ORDER BY} over all the fields

in the @code{GROUP BY}. @code{MySQL} has extended the @code{GROUP BY} so that

in the @code{GROUP BY}. @strong{MySQL} has extended the @code{GROUP BY} so that

you can also specify @code{ASC} and @code{DESC} to @code{GROUP BY}:

@example

The value of the @code{--port} option.

@item @code{protocol_version}

The protocol version used by the @code{MySQL} server.

The protocol version used by the @strong{MySQL} server.

@item @code{record_buffer}

Each thread that does a sequential scan allocates a buffer of this

you have to revoke these yourself if needed.

@item

If you in @code{MySQL} have the @code{INSERT} grant on only part of the

If you in @strong{MySQL} have the @code{INSERT} grant on only part of the

columns in a table, you can execute @code{INSERT} statements on the

table; The columns for which you don't have the @code{INSERT} privilege

will set to their default values. ANSI SQL requires you to have the

table.

Note that you can also manipulate the @code{.MRG} file directly from

the outside of the @code{MySQL} server:

the outside of the @strong{MySQL} server:

@example

shell> cd /mysql-data-directory/current-database

@node BDB overview, BDB install, BDB, BDB

@subsection Overview over BDB tables

Innobase is included in the @code{MySQL} source distribution starting

from 3.23.34 and will be activated in the @code{MySQL}-max binary.

Innobase is included in the @strong{MySQL} source distribution starting

from 3.23.34 and will be activated in the @strong{MySQL}-max binary.

Berkeley DB (@uref{http://www.sleepycat.com}) has provided

@strong{MySQL} with a transaction-safe table handler. This will survive

If you would like to install Berkeley DB separately, to use with

other applications and MySQL, this is possible.  Follow the directions

for installing Berkeley DB in the Berkeley DB README file.  Then, pass

the @code{--with-berkeley-db=DIR} option to @code{MySQL}'s @code{configure},

the @code{--with-berkeley-db=DIR} option to @strong{MySQL}'s @code{configure},

where @code{DIR} refers to the installation prefix used when installing

Berkeley DB (by default it is

/usr/local/BerkeleyDB.3.2). You can give additional options to

@node INNOBASE,  , BDB, Table types

@section INNOBASE Tables

Innobase is included in the @code{MySQL} source distribution starting

from 3.23.34 and will be activated in the @code{MySQL}-max binary.

Innobase is included in the @strong{MySQL} source distribution starting

from 3.23.34 and will be activated in the @strong{MySQL}-max binary.

Innobase provides MySQL with a transaction safe table handler with

commit, rollback, and crash recovery capabilities.  Innobase does

After 3.23.26, we have locked the replication protocol for modifications, so

you can upgrade masters and slave on the fly to a newer 3.23 version and you

can have different versions of @code{MySQL} running on the slave and the

can have different versions of @strong{MySQL} running on the slave and the

master, as long as they are both newer than 3.23.26. 

@cindex replication, two-way

for reads, connecting for writes, doing a read, and doing a write.

@strong{Q}: When and how much can @code{MySQL} replication improve the performance

@strong{Q}: When and how much can @strong{MySQL} replication improve the performance

of my system?

@strong{A}: @strong{MySQL} replication is most beneficial for a system

@cindex multi mysqld

@cindex @code{mysqld_multi}

@node  mysqld_multi, mysql, safe_mysqld, Tools

@section mysqld_multi, program for managing multiple @code{MySQL} servers

@section mysqld_multi, program for managing multiple @strong{MySQL} servers

@code{mysqld_multi} is meant for managing several @code{mysqld}

processes running in different UNIX sockets and TCP/IP ports.

@xref{Reproducable test case}.

@item

Try running the included mysql-test test and the @code{MySQL}

Try running the included mysql-test test and the @strong{MySQL}

benchmarks.  @xref{MySQL test suite}.  They should test @strong{MySQL}

rather well.  You can also add code that to the benchmarks to simulates

your application!  The benchmarks can be found in the @file{bench}

This manual section is very new and we plan to add more stories here

shortly.  If you are interested in contributing of how you use

@code{MySQL} in a unique environment or have success store about how you

use @code{MySQL}, you can write to @code{docs@@lists.mysql.com} with

@strong{MySQL} in a unique environment or have success store about how you

use @strong{MySQL}, you can write to @code{docs@@lists.mysql.com} with

subject @code{Success:}.  Note that as we are very busy it may take some

time before you get some feedback for your story.

@item OLEDB

@itemize @bullet

@item @uref{http://www.mysql.com/Downloads/Win32/MyOLEDB.exe, MyOLEDB.exe}

OLEDB handler for @code{MySQL}. By SWsoft.

OLEDB handler for @strong{MySQL}. By SWsoft.

@item @uref{http://www.mysql.com/Downloads/Win32/MySamples.zip, MySamples.zip}

Examples and documentation for MyOLEDB. By SWsoft.

@item @uref{http://www.mysql.com/Downloads/Win32/Myoledb.zip, Myoledb.zip}

for all MySQL fieldtypes (version 2001.1.1). By SciBit @uref{http://www.scibit.com/}.

@item @uref{http://www.fastflow.it/mylua/, MyLUA home page}

How to use the LUA language to write @code{MySQL} @code{PROCEDURE} that can

How to use the LUA language to write @strong{MySQL} @code{PROCEDURE} that can

be loaded runtime.

@itemize @bullet

@item @uref{http://www.mysql.com/Downloads/Contrib/lua-4.0.tar.gz, Lua 4.0}