'\" t
.\"     Title: \fBmysqlslap\fR
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 01/04/2021
.\"    Manual: MySQL Database System
.\"    Source: MySQL 5.6
.\"  Language: English
.\"
.TH "\FBMYSQLSLAP\FR" "1" "01/04/2021" "MySQL 5\&.6" "MySQL Database System"
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.SH "NAME"
mysqlslap \- a load emulation client
.SH "SYNOPSIS"
.HP \w'\fBmysqlslap\ [\fR\fB\fIoptions\fR\fR\fB]\fR\ 'u
\fBmysqlslap [\fR\fB\fIoptions\fR\fR\fB]\fR
.SH "DESCRIPTION"
.PP
\fBmysqlslap\fR
is a diagnostic program designed to emulate client load for a MySQL server and to report the timing of each stage\&. It works as if multiple clients are accessing the server\&.
.PP
Invoke
\fBmysqlslap\fR
like this:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqlslap [\fR\fB\fIoptions\fR\fR\fB]\fR
.fi
.if n \{\
.RE
.\}
.PP
Some options such as
\fB\-\-create\fR
or
\fB\-\-query\fR
enable you to specify a string containing an SQL statement or a file containing statements\&. If you specify a file, by default it must contain one statement per line\&. (That is, the implicit statement delimiter is the newline character\&.) Use the
\fB\-\-delimiter\fR
option to specify a different delimiter, which enables you to specify statements that span multiple lines or place multiple statements on a single line\&. You cannot include comments in a file;
\fBmysqlslap\fR
does not understand them\&.
.PP
\fBmysqlslap\fR
runs in three stages:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  1." 4.2
.\}
Create schema, table, and optionally any stored programs or data to use for the test\&. This stage uses a single client connection\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  2." 4.2
.\}
Run the load test\&. This stage can use many client connections\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  3." 4.2
.\}
Clean up (disconnect, drop table if specified)\&. This stage uses a single client connection\&.
.RE
.PP
Examples:
.PP
Supply your own create and query SQL statements, with 50 clients querying and 200 selects for each (enter the command on a single line):
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlslap \-\-delimiter=";"
  \-\-create="CREATE TABLE a (b int);INSERT INTO a VALUES (23)"
  \-\-query="SELECT * FROM a" \-\-concurrency=50 \-\-iterations=200
.fi
.if n \{\
.RE
.\}
.PP
Let
\fBmysqlslap\fR
build the query SQL statement with a table of two
INT
columns and three
VARCHAR
columns\&. Use five clients querying 20 times each\&. Do not create the table or insert the data (that is, use the previous test\*(Aqs schema and data):
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlslap \-\-concurrency=5 \-\-iterations=20
  \-\-number\-int\-cols=2 \-\-number\-char\-cols=3
  \-\-auto\-generate\-sql
.fi
.if n \{\
.RE
.\}
.PP
Tell the program to load the create, insert, and query SQL statements from the specified files, where the
create\&.sql
file has multiple table creation statements delimited by
\*(Aq;\*(Aq
and multiple insert statements delimited by
\*(Aq;\*(Aq\&. The
\fB\-\-query\fR
file has multiple queries delimited by
\*(Aq;\*(Aq\&. Run all the load statements, then run all the queries in the query file with five clients (five times each):
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlslap \-\-concurrency=5
  \-\-iterations=5 \-\-query=query\&.sql \-\-create=create\&.sql
  \-\-delimiter=";"
.fi
.if n \{\
.RE
.\}
.PP
\fBmysqlslap\fR
supports the following options, which can be specified on the command line or in the
[mysqlslap]
and
[client]
groups of an option file\&. For information about option files used by MySQL programs, see
Section\ \&4.2.2.2, \(lqUsing Option Files\(rq\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-help\fR,
\fB\-?\fR
Display a help message and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\fR,
\fB\-a\fR
Generate SQL statements automatically when they are not supplied in files or using command options\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-add\-autoincrement\fR
Add an
AUTO_INCREMENT
column to automatically generated tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-execute\-number=\fR\fB\fIN\fR\fR
Specify how many queries to generate automatically\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-guid\-primary\fR
Add a GUID\-based primary key to automatically generated tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-load\-type=\fR\fB\fItype\fR\fR
Specify the test load type\&. The permissible values are
read
(scan tables),
write
(insert into tables),
key
(read primary keys),
update
(update primary keys), or
mixed
(half inserts, half scanning selects)\&. The default is
mixed\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-secondary\-indexes=\fR\fB\fIN\fR\fR
Specify how many secondary indexes to add to automatically generated tables\&. By default, none are added\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-unique\-query\-number=\fR\fB\fIN\fR\fR
How many different queries to generate for automatic tests\&. For example, if you run a
key
test that performs 1000 selects, you can use this option with a value of 1000 to run 1000 unique queries, or with a value of 50 to perform 50 different selects\&. The default is 10\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-unique\-write\-number=\fR\fB\fIN\fR\fR
How many different queries to generate for
\fB\-\-auto\-generate\-sql\-write\-number\fR\&. The default is 10\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-auto\-generate\-sql\-write\-number=\fR\fB\fIN\fR\fR
How many row inserts to perform\&. The default is 100\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-commit=\fR\fB\fIN\fR\fR
How many statements to execute before committing\&. The default is 0 (no commits are done)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-compress\fR,
\fB\-C\fR
Compress all information sent between the client and the server if possible\&. See
Section\ \&4.2.6, \(lqConnection Compression Control\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-concurrency=\fR\fB\fIN\fR\fR,
\fB\-c \fR\fB\fIN\fR\fR
The number of parallel clients to simulate\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-create=\fR\fB\fIvalue\fR\fR
The file or string containing the statement to use for creating the table\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-create\-schema=\fR\fB\fIvalue\fR\fR
The schema in which to run the tests\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
If the
\fB\-\-auto\-generate\-sql\fR
option is also given,
\fBmysqlslap\fR
drops the schema at the end of the test run\&. To avoid this, use the
\fB\-\-no\-drop\fR
option as well\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-csv[=\fR\fB\fIfile_name\fR\fR\fB]\fR
Generate output in comma\-separated values format\&. The output goes to the named file, or to the standard output if no file is given\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-debug[=\fR\fB\fIdebug_options\fR\fR\fB]\fR,
\fB\-# [\fR\fB\fIdebug_options\fR\fR\fB]\fR
Write a debugging log\&. A typical
\fIdebug_options\fR
string is
d:t:o,\fIfile_name\fR\&. The default is
d:t:o,/tmp/mysqlslap\&.trace\&.
.sp
This option is available only if MySQL was built using
\fBWITH_DEBUG\fR\&. MySQL release binaries provided by Oracle are
\fInot\fR
built using this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-debug\-check\fR
Print some debugging information when the program exits\&.
.sp
This option is available only if MySQL was built using
\fBWITH_DEBUG\fR\&. MySQL release binaries provided by Oracle are
\fInot\fR
built using this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-debug\-info\fR,
\fB\-T\fR
Print debugging information and memory and CPU usage statistics when the program exits\&.
.sp
This option is available only if MySQL was built using
\fBWITH_DEBUG\fR\&. MySQL release binaries provided by Oracle are
\fInot\fR
built using this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-default\-auth=\fR\fB\fIplugin\fR\fR
A hint about which client\-side authentication plugin to use\&. See
Section\ \&6.2.11, \(lqPluggable Authentication\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-extra\-file=\fR\fB\fIfile_name\fR\fR
Read this option file after the global option file but (on Unix) before the user option file\&. If the file does not exist or is otherwise inaccessible, an error occurs\&.
\fIfile_name\fR
is interpreted relative to the current directory if given as a relative path name rather than a full path name\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-file=\fR\fB\fIfile_name\fR\fR
Use only the given option file\&. If the file does not exist or is otherwise inaccessible, an error occurs\&.
\fIfile_name\fR
is interpreted relative to the current directory if given as a relative path name rather than a full path name\&.
.sp
Exception: Even with
\fB\-\-defaults\-file\fR, client programs read
\&.mylogin\&.cnf\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-group\-suffix=\fR\fB\fIstr\fR\fR
Read not only the usual option groups, but also groups with the usual names and a suffix of
\fIstr\fR\&. For example,
\fBmysqlslap\fR
normally reads the
[client]
and
[mysqlslap]
groups\&. If the
\fB\-\-defaults\-group\-suffix=_other\fR
option is given,
\fBmysqlslap\fR
also reads the
[client_other]
and
[mysqlslap_other]
groups\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-delimiter=\fR\fB\fIstr\fR\fR,
\fB\-F \fR\fB\fIstr\fR\fR
The delimiter to use in SQL statements supplied in files or using command options\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-detach=\fR\fB\fIN\fR\fR
Detach (close and reopen) each connection after each
\fIN\fR
statements\&. The default is 0 (connections are not detached)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-enable\-cleartext\-plugin\fR
Enable the
mysql_clear_password
cleartext authentication plugin\&. (See
Section\ \&6.4.1.5, \(lqClient-Side Cleartext Pluggable Authentication\(rq\&.)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-engine=\fR\fB\fIengine_name\fR\fR,
\fB\-e \fR\fB\fIengine_name\fR\fR
The storage engine to use for creating tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-host=\fR\fB\fIhost_name\fR\fR,
\fB\-h \fR\fB\fIhost_name\fR\fR
Connect to the MySQL server on the given host\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-iterations=\fR\fB\fIN\fR\fR,
\fB\-i \fR\fB\fIN\fR\fR
The number of times to run the tests\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-login\-path=\fR\fB\fIname\fR\fR
Read options from the named login path in the
\&.mylogin\&.cnf
login path file\&. A
\(lqlogin path\(rq
is an option group containing options that specify which MySQL server to connect to and which account to authenticate as\&. To create or modify a login path file, use the
\fBmysql_config_editor\fR
utility\&. See
\fBmysql_config_editor\fR(1)\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-drop\fR
Prevent
\fBmysqlslap\fR
from dropping any schema it creates during the test run\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-defaults\fR
Do not read any option files\&. If program startup fails due to reading unknown options from an option file,
\fB\-\-no\-defaults\fR
can be used to prevent them from being read\&.
.sp
The exception is that the
\&.mylogin\&.cnf
file, if it exists, is read in all cases\&. This permits passwords to be specified in a safer way than on the command line even when
\fB\-\-no\-defaults\fR
is used\&. (\&.mylogin\&.cnf
is created by the
\fBmysql_config_editor\fR
utility\&. See
\fBmysql_config_editor\fR(1)\&.)
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-number\-char\-cols=\fR\fB\fIN\fR\fR,
\fB\-x \fR\fB\fIN\fR\fR
The number of
VARCHAR
columns to use if
\fB\-\-auto\-generate\-sql\fR
is specified\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-number\-int\-cols=\fR\fB\fIN\fR\fR,
\fB\-y \fR\fB\fIN\fR\fR
The number of
INT
columns to use if
\fB\-\-auto\-generate\-sql\fR
is specified\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-number\-of\-queries=\fR\fB\fIN\fR\fR
Limit each client to approximately this many queries\&. Query counting takes into account the statement delimiter\&. For example, if you invoke
\fBmysqlslap\fR
as follows, the
;
delimiter is recognized so that each instance of the query string counts as two queries\&. As a result, 5 rows (not 10) are inserted\&.
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqlslap \-\-delimiter=";" \-\-number\-of\-queries=10\fR
         \fB\-\-query="use test;insert into t values(null)"\fR
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-only\-print\fR
Do not connect to databases\&.
\fBmysqlslap\fR
only prints what it would have done\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-password[=\fR\fB\fIpassword\fR\fR\fB]\fR,
\fB\-p[\fR\fB\fIpassword\fR\fR\fB]\fR
The password of the MySQL account used for connecting to the server\&. The password value is optional\&. If not given,
\fBmysqlslap\fR
prompts for one\&. If given, there must be
\fIno space\fR
between
\fB\-\-password=\fR
or
\fB\-p\fR
and the password following it\&. If no password option is specified, the default is to send no password\&.
.sp
Specifying a password on the command line should be considered insecure\&. To avoid giving the password on the command line, use an option file\&. See
Section\ \&6.1.2.1, \(lqEnd-User Guidelines for Password Security\(rq\&.
.sp
To explicitly specify that there is no password and that
\fBmysqlslap\fR
should not prompt for one, use the
\fB\-\-skip\-password\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-pipe\fR,
\fB\-W\fR
On Windows, connect to the server using a named pipe\&. This option applies only if the server was started with the
named_pipe
system variable enabled to support named\-pipe connections\&. In addition, the user making the connection must be a member of the Windows group specified by the
named_pipe_full_access_group
system variable\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-plugin\-dir=\fR\fB\fIdir_name\fR\fR
The directory in which to look for plugins\&. Specify this option if the
\fB\-\-default\-auth\fR
option is used to specify an authentication plugin but
\fBmysqlslap\fR
does not find it\&. See
Section\ \&6.2.11, \(lqPluggable Authentication\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-port=\fR\fB\fIport_num\fR\fR,
\fB\-P \fR\fB\fIport_num\fR\fR
For TCP/IP connections, the port number to use\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-post\-query=\fR\fB\fIvalue\fR\fR
The file or string containing the statement to execute after the tests have completed\&. This execution is not counted for timing purposes\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-post\-system=\fR\fB\fIstr\fR\fR
The string to execute using
system()
after the tests have completed\&. This execution is not counted for timing purposes\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-pre\-query=\fR\fB\fIvalue\fR\fR
The file or string containing the statement to execute before running the tests\&. This execution is not counted for timing purposes\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-pre\-system=\fR\fB\fIstr\fR\fR
The string to execute using
system()
before running the tests\&. This execution is not counted for timing purposes\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print\-defaults\fR
Print the program name and all options that it gets from option files\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-protocol={TCP|SOCKET|PIPE|MEMORY}\fR
The transport protocol to use for connecting to the server\&. It is useful when the other connection parameters normally result in use of a protocol other than the one you want\&. For details on the permissible values, see
Section\ \&4.2.5, \(lqConnection Transport Protocols\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-query=\fR\fB\fIvalue\fR\fR,
\fB\-q \fR\fB\fIvalue\fR\fR
The file or string containing the
SELECT
statement to use for retrieving data\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-secure\-auth\fR
Do not send passwords to the server in old (pre\-4\&.1) format\&. This prevents connections except for servers that use the newer password format\&. This option is enabled by default; use
\fB\-\-skip\-secure\-auth\fR
to disable it\&. This option was added in MySQL 5\&.6\&.17\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
Passwords that use the pre\-4\&.1 hashing method are less secure than passwords that use the native password hashing method and should be avoided\&. Pre\-4\&.1 passwords are deprecated; expect support for them to be removed in a future MySQL release\&. For account upgrade instructions, see
Section\ \&6.4.1.3, \(lqMigrating Away from Pre-4.1 Password Hashing and the mysql_old_password Plugin\(rq\&.
.sp .5v
.RE
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
This option is deprecated; expect it to be removed in a future release\&. As of MySQL 5\&.7\&.5, it is always enabled and attempting to disable it produces an error\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-shared\-memory\-base\-name=\fR\fB\fIname\fR\fR
On Windows, the shared\-memory name to use for connections made using shared memory to a local server\&. The default value is
MYSQL\&. The shared\-memory name is case\-sensitive\&.
.sp
This option applies only if the server was started with the
shared_memory
system variable enabled to support shared\-memory connections\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-silent\fR,
\fB\-s\fR
Silent mode\&. No output\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-socket=\fR\fB\fIpath\fR\fR,
\fB\-S \fR\fB\fIpath\fR\fR
For connections to
localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use\&.
.sp
On Windows, this option applies only if the server was started with the
named_pipe
system variable enabled to support named\-pipe connections\&. In addition, the user making the connection must be a member of the Windows group specified by the
named_pipe_full_access_group
system variable\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ssl*\fR
Options that begin with
\fB\-\-ssl\fR
specify whether to connect to the server using SSL and indicate where to find SSL keys and certificates\&. See
the section called \(lqCommand Options for Encrypted Connections\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-user=\fR\fB\fIuser_name\fR\fR,
\fB\-u \fR\fB\fIuser_name\fR\fR
The user name of the MySQL account to use for connecting to the server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-verbose\fR,
\fB\-v\fR
Verbose mode\&. Print more information about what the program does\&. This option can be used multiple times to increase the amount of information\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-version\fR,
\fB\-V\fR
Display version information and exit\&.
.RE
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2021, Oracle and/or its affiliates.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation 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.
.PP
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
.sp
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).
