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F. Environment Variables

Here is a list of all the environment variables that are used directly or indirectly by MySQL. Most of these can also be found in other places in this manual.

Note that any options on the command-line will take precedence over values specified in configuration files and environment variables, and values in configuration files take precedence over values in environment variables.

In many cases it's preferable to use a configure file instead of environment variables to modify the behaviour of MySQL. See section `my.cnf' Option Files.

Variable

Description

CCX

Set this to your C++ compiler when running configure.

CC

Set this to your C compiler when running configure.

CFLAGS

Flags for your C compiler when running configure.

CXXFLAGS

Flags for your C++ compiler when running configure.

DBI_USER

The default user name for Perl DBI.

DBI_TRACE

Used when tracing Perl DBI.

HOME

The default path for the mysql history file is `$HOME/.mysql_history'.

LD_RUN_PATH

Used to specify where your `libmysqlclient.so' is.

MYSQL_DEBUG

Debug-trace options when debugging.

MYSQL_HISTFILE

The path to the mysql history file.

MYSQL_HOST

Default host name used by the mysql command-line client.

MYSQL_PS1

Command prompt to use in the mysql command-line client. See section mysql, The Command-line Tool.

MYSQL_PWD

The default password when connecting to mysqld. Note that use of this is insecure!

MYSQL_TCP_PORT

The default TCP/IP port.

MYSQL_UNIX_PORT

The default socket; used for connections to localhost.

PATH

Used by the shell to finds the MySQL programs.

TMPDIR

The directory where temporary tables/files are created.

TZ

This should be set to your local time zone. See section Time Zone Problems.

UMASK_DIR

The user-directory creation mask when creating directories. Note that this is ANDed with UMASK!

UMASK

The user-file creation mask when creating files.

USER

The default user on Windows to use when connecting to mysqld.

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