path: root/man/mysqldump.1

'\" t
.\"
.TH "\fBMARIADB-DUMP\fR" "1" "24 October 2020" "MariaDB 10.11" "MariaDB Database System"
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.\" mysqldump
.\" dumping: databases and tables
.\" backups: databases and tables
.\" databases: dumping
.\" tables: dumping
.SH "NAME"
mariadb-dump \- a database backup program (mysqldump is now a symlink to mariadb-dump)
.SH "SYNOPSIS"
.HP \w'\fBmysqldump\ [\fR\fB\fIoptions\fR\fR\fB]\ [\fR\fB\fIdb_name\fR\fR\fB\ [\fR\fB\fItbl_name\fR\fR\fB\ \&.\&.\&.]]\fR\ 'u
\fBmysqldump [\fR\fB\fIoptions\fR\fR\fB] [\fR\fB\fIdb_name\fR\fR\fB [\fR\fB\fItbl_name\fR\fR\fB \&.\&.\&.]]\fR
.SH "DESCRIPTION"
.PP
The
\fBmysqldump\fR
client is a backup program originally written by Igor Romanenko\&. It can be used to dump a database or a collection of databases for backup or transfer to another SQL server (not necessarily a MariaDB server)\&. The dump typically contains SQL statements to create the table, populate it, or both\&. However,
\fBmysqldump\fR
can also be used to generate files in CSV, other delimited text, or XML format\&.
.PP
If you are doing a backup on the server and your tables all are
MyISAM
tables, consider using the
\fBmysqlhotcopy\fR
instead because it can accomplish faster backups and faster restores\&. See
\fBmysqlhotcopy\fR(1)\&.
.PP
There are four general ways to invoke
\fBmysqldump\fR:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIdb_name\fR\fR\fB [\fR\fB\fItbl_name\fR\fR\fB \&.\&.\&.]\fR
shell> \fBmysqldump [\fR\fB\fIoptions\fR\fR\fB] \-\-databases \fR\fB\fIdb_name\fR\fR\fB \&.\&.\&.\fR
shell> \fBmysqldump [\fR\fB\fIoptions\fR\fR\fB] \-\-all\-databases\fR
shell> \fBmysqldump [\fR\fB\fIoptions\fR\fR\fB] \-\-system={options}\fR
.fi
.if n \{\
.RE
.\}
.PP
If you do not name any tables following
\fIdb_name\fR
or if you use the
\fB\-\-databases\fR
or
\fB\-\-all\-databases\fR
option, entire databases are dumped\&.
.PP
\fBmysqldump\fR
does not dump the
INFORMATION_SCHEMA or performance_schema
databases by default\&. To dump these,
name them explicitly on the command line, although you must also use the
\fB\-\-skip\-lock\-tables\fR
option\&.
.PP
To see a list of the options your version of
\fBmysqldump\fR
supports, execute
\fBmysqldump \-\-help\fR\&.
.PP
Some
\fBmysqldump\fR
options are shorthand for groups of other options:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Use of
\fB\-\-opt\fR
is the same as specifying
\fB\-\-add\-drop\-table\fR,
\fB\-\-add\-locks\fR,
\fB\-\-create\-options\fR,
\fB\-\-disable\-keys\fR,
\fB\-\-extended\-insert\fR,
\fB\-\-lock\-tables\fR,
\fB\-\-quick\fR, and
\fB\-\-set\-charset\fR\&. All of the options that
\fB\-\-opt\fR
stands for also are on by default because
\fB\-\-opt\fR
is on by default\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Use of
\fB\-\-compact\fR
is the same as specifying
\fB\-\-skip\-add\-drop\-table\fR,
\fB\-\-skip\-add\-locks\fR,
\fB\-\-skip\-comments\fR,
\fB\-\-skip\-disable\-keys\fR, and
\fB\-\-skip\-set\-charset\fR
options\&.
.RE
.PP
To reverse the effect of a group option, uses its
\fB\-\-skip\-\fR\fB\fIxxx\fR\fR
form (\fB\-\-skip\-opt\fR
or
\fB\-\-skip\-compact\fR)\&. It is also possible to select only part of the effect of a group option by following it with options that enable or disable specific features\&. Here are some examples:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
To select the effect of
\fB\-\-opt\fR
except for some features, use the
\fB\-\-skip\fR
option for each feature\&. To disable extended inserts and memory buffering, use
\fB\-\-opt\fR
\fB\-\-skip\-extended\-insert\fR
\fB\-\-skip\-quick\fR\&. (Actually,
\fB\-\-skip\-extended\-insert\fR
\fB\-\-skip\-quick\fR
is sufficient because
\fB\-\-opt\fR
is on by default\&.)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
To reverse
\fB\-\-opt\fR
for all features except index disabling and table locking, use
\fB\-\-skip\-opt\fR
\fB\-\-disable\-keys\fR
\fB\-\-lock\-tables\fR\&.
.RE
.PP
When you selectively enable or disable the effect of a group option, order is important because options are processed first to last\&. For example,
\fB\-\-disable\-keys\fR
\fB\-\-lock\-tables\fR
\fB\-\-skip\-opt\fR
would not have the intended effect; it is the same as
\fB\-\-skip\-opt\fR
by itself\&.
.PP
\fBmysqldump\fR
can retrieve and dump table contents row by row, or it can retrieve the entire content from a table and buffer it in memory before dumping it\&. Buffering in memory can be a problem if you are dumping large tables\&. To dump tables row by row, use the
\fB\-\-quick\fR
option (or
\fB\-\-opt\fR, which enables
\fB\-\-quick\fR)\&. The
\fB\-\-opt\fR
option (and hence
\fB\-\-quick\fR) is enabled by default, so to enable memory buffering, use
\fB\-\-skip\-quick\fR\&.
.PP
If you are using a recent version of
\fBmysqldump\fR
to generate a dump to be reloaded into a very old MySQL server, you should not use the
\fB\-\-opt\fR
or
\fB\-\-extended\-insert\fR
option\&. Use
\fB\-\-skip\-opt\fR
instead\&.
.RE
.PP
\fBmysqldump\fR
supports the following options, which can be specified on the command line or in the
[mysqldump]
and
[client]
option file groups\&.
\fBmysqldump\fR
also supports the options for processing option file\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: help option
.\" help option: mysqldump
\fB\-\-help\fR,
\fB\-?\fR
.sp
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
.\}
.\" mysqldump: add-drop-database option
.\" add-drop-database option: mysqldump
\fB\-\-add\-drop\-database\fR
.sp
Add a
DROP DATABASE
statement before each
CREATE DATABASE
statement\&. This option is typically used in conjunction with the
\fB\-\-all\-databases\fR
or
\fB\-\-databases\fR
option because no
CREATE DATABASE
statements are written unless one of those options is specified\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: add-drop-table option
.\" add-drop-table option: mysqldump
\fB\-\-add\-drop\-table\fR
.sp
Add a
DROP TABLE
statement before each
CREATE TABLE
statement\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: add-drop-trigger option
.\" add-drop-trigger option: mysqldump
\fB\-\-add\-drop\-trigger\fR
.sp
Add a
DROP TRIGGER
statement before each
CREATE TRIGGER
statement\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: add-locks option
.\" add-locks option: mysqldump
\fB\-\-add\-locks\fR
.sp
Surround each table dump with
LOCK TABLES
and
UNLOCK TABLES
statements\&. This results in faster inserts when the dump file is reloaded\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: all-databases option
.\" all-databases option: mysqldump
\fB\-\-all\-databases\fR,
\fB\-A\fR
.sp
Dump all tables in all databases\&. This is the same as using the
\fB\-\-databases\fR
option and naming all the databases on the command line\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: all-tablespaces option
.\" all-tablespaces option: mysqldump
\fB\-\-all\-tablespaces\fR,
\fB\-Y\fR
.sp
Adds to a table dump all SQL statements needed to create any tablespaces used by an
NDBCLUSTER
table\&. This information is not otherwise included in the output from
\fBmysqldump\fR\&. This option is currently relevant only to MySQL Cluster tables\&.
.sp
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: allow-keywords option
.\" allow-keywords option: mysqldump
\fB\-\-allow\-keywords\fR
.sp
Allow creation of column names that are keywords\&. This works by prefixing each column name with the table name\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: apply-slave-statements option
.\" apply-slave-statements option: mysqldump
\fB\-\-apply\-slave\-statements\fR
.sp
Adds 'STOP SLAVE' prior to 'CHANGE MASTER' and 'START SLAVE' to bottom of dump\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: character-sets-dir option
.\" character-sets-dir option: mysqldump
\fB\-\-character\-sets\-dir=\fR\fB\fIpath\fR\fR
.sp
The directory where character sets are installed\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: comments option
.\" comments option: mysqldump
\fB\-\-comments\fR,
\fB\-i\fR
.sp
Write additional information in the dump file such as program version, server version, and host\&. This option is enabled by default\&. To suppress this additional information, use
\fB\-\-skip\-comments\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: compact option
.\" compact option: mysqldump
\fB\-\-compact\fR
.sp
Produce more compact output\&. This option enables the
\fB\-\-skip\-add\-drop\-table\fR,
\fB\-\-skip\-add\-locks\fR,
\fB\-\-skip\-comments\fR,
\fB\-\-skip\-disable\-keys\fR, and
\fB\-\-skip\-set\-charset\fR
options\&.
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: compatible option
.\" compatible option: mysqldump
\fB\-\-compatible=\fR\fB\fIname\fR\fR
.sp
Produce output that is more compatible with other database systems or with older MySQL servers\&. The value of
\fIname\fR
can be
ansi,
mysql323,
mysql40,
postgresql,
oracle,
mssql,
db2,
maxdb,
no_key_options,
no_table_options, or
no_field_options\&. To use several values, separate them by commas\&. These values have the same meaning as the corresponding options for setting the server SQL mode\&.
.sp
This option does not guarantee compatibility with other servers\&. It only enables those SQL mode values that are currently available for making dump output more compatible\&. For example,
\fB\-\-compatible=oracle\fR
does not map data types to Oracle types or use Oracle comment syntax\&.
.sp
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: complete-insert option
.\" complete-insert option: mysqldump
\fB\-\-complete\-insert\fR,
\fB\-c\fR
.sp
Use complete
INSERT
statements that include column names\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: compress option
.\" compress option: mysqldump
\fB\-\-compress\fR,
\fB\-C\fR
.sp
Compress all information sent between the client and the server if both support compression\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: copy-s3-tables option
.\" copy-s3-tables option: mysqldump
\fB\-\-copy\-s3\-tables\fR
.sp
By default S3 tables are ignored\&. With this option set, the result file will contain a CREATE statement
for a similar Aria table, followed by the table data and ending with an ALTER TABLE xxx ENGINE=S3\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: create-options option
.\" create-options option: mysqldump
\fB\-\-create\-options\fR,
\fB\-a\fR
.sp
Include all MariaDB\-specific table options in the
CREATE TABLE
statements\&. Use \fB\-\-skip-create-options\fR to disable.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: databases option
.\" databases option: mysqldump
\fB\-\-databases\fR,
\fB\-B\fR
.sp
Dump several databases\&. Normally,
\fBmysqldump\fR
treats the first name argument on the command line as a database name and following names as table names\&. With this option, it treats all name arguments as database names\&.
CREATE DATABASE
and
USE
statements are included in the output before each new database\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: debug option
.\" debug option: mysqldump
\fB\-\-debug[=\fR\fB\fIdebug_options\fR\fR\fB]\fR,
\fB\-# [\fR\fB\fIdebug_options\fR\fR\fB]\fR
.sp
Write a debugging log\&. A typical
\fIdebug_options\fR
string is 'd:t:o,\fIfile_name\fR'. The default value is 'd:t:o,/tmp/mysqldump.trace'.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: debug-check option
.\" debug-check option: mysqldump
\fB\-\-debug\-check\fR
.sp
Print some debugging information when the program exits\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: debug-info option
.\" debug-info option: mysqldump
\fB\-\-debug\-info\fR
.sp
Print debugging information and memory and CPU usage statistics when the program exits\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: default-auth option
.\" default-auth option: mysqldump
\fB\-\-default\-auth\fR
.sp
Default authentication client-side plugin to use\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: default-character-set option
.\" default-character-set option: mysqldump
\fB\-\-default\-character\-set=\fR\fB\fIcharset_name\fR\fR
.sp
Use
\fIcharset_name\fR
as the default character set\&. If no character set is specified,
\fBmysqldump\fR
uses
utf8\&.
.sp
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: defaults-extra-file option
.\" defaults-extra-file option: mysqldump
\fB\-\-defaults\-extra\-file=\fR\fB\fIfilename\fR\fR
.sp
Set \fB\fIfilename\fR\fR as the file to read default options from after the global defaults files has been read\&.
Must be given as first option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: defaults-file option
.\" defaults-file option: mysqldump
\fB\-\-defaults\-file=\fR\fB\fIfilename\fR\fR
.sp
Set \fB\fIfilename\fR\fR as the file to read default options from, override global defaults files\&.
Must be given as first option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" my_print_defaults: defaults-group-suffix option
.\" defaults-group-suffix option: my_print_defaults
\fB\-\-defaults\-group\-suffix=\fR\fB\fIstr\fR\fR,
.sp
Also read groups with a suffix of \fIstr\fR\&. For example, since mysqldump normally reads the [client] and [mysqldump] groups, \-\-defaults\-group\-suffix=x would cause it to also read the groups [mysqldump_x] and [client_x]\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: delayed-insert option
.\" delayed-insert option: mysqldump
\fB\-\-delayed\-insert\fR
.sp
Write
INSERT DELAYED
statements rather than
INSERT
statements\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: delete-master-logs option
.\" delete-master-logs option: mysqldump
\fB\-\-delete\-master\-logs\fR
.sp
On a master replication server, delete the binary logs by sending a
PURGE BINARY LOGS
statement to the server after performing the dump operation\&. This option automatically enables
\fB\-\-master\-data\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: disable-keys option
.\" disable-keys option: mysqldump
\fB\-\-disable\-keys\fR,
\fB\-K\fR
.sp
For each table, surround the
INSERT
statements with
/*!40000 ALTER TABLE \fItbl_name\fR DISABLE KEYS */;
and
/*!40000 ALTER TABLE \fItbl_name\fR ENABLE KEYS */;
statements\&. This makes loading the dump file faster because the indexes are created after all rows are inserted\&. This option is effective only for nonunique indexes of
MyISAM
tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: dump-date option
.\" dump-date option: mysqldump
\fB\-\-dump\-date\fR
.sp
If the
\fB\-\-comments\fR
option is given,
\fBmysqldump\fR
produces a comment at the end of the dump of the following form:
.sp
.if n \{\
.RS 4
.\}
.nf
\-\- Dump completed on \fIDATE\fR
.fi
.if n \{\
.RE
.\}
.sp
However, the date causes dump files taken at different times to appear to be different, even if the data are otherwise identical\&.
\fB\-\-dump\-date\fR
and
\fB\-\-skip\-dump\-date\fR
control whether the date is added to the comment\&. The default is
\fB\-\-dump\-date\fR
(include the date in the comment)\&.
\fB\-\-skip\-dump\-date\fR
suppresses date printing\&
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: dump-slave option
.\" dump-slave option: mysqldump
\fB\-\-dump\-slave[=\fR\fB\fIvalue\fR\fR\fB]\fR
.sp
Used for producing a dump file from a replication slave server that can be used to set up another slave server
with the same master\&. Causes the binary log position and filename of the master to be appended to the dumped
data output\&. Setting the value to 1 (the default) will print it as a CHANGE MASTER command in the dumped data
output; if set to 2, that command will be prefixed with a comment symbol\&. This option will turn
\-\-lock\-all\-tables on, unless \-\-single-transaction is specified too (in which case a global read lock is only
taken a short time at the beginning of the dump \- don't forget to read about \-\-single-transaction below)\&. In
all cases any action on logs will happen at the exact moment of the dump\&. Option automatically turns
\-\-lock\-tables off\&. Using this option causes mysqldump to stop the slave SQL thread before beginning the dump,
and restart it again after completion\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: events option
.\" events option: mysqldump
\fB\-\-events\fR,
\fB\-E\fR
.sp
Include Event Scheduler events for the dumped databases in the output\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: extended-insert option
.\" extended-insert option: mysqldump
\fB\-\-extended\-insert\fR,
\fB\-e\fR
.sp
Use multiple\-row
INSERT
syntax that include several
VALUES
lists\&. This results in a smaller dump file and speeds up inserts when the file is reloaded\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: fields-terminated-by option
.\" fields-terminated-by option: mysqldump
\fB\-\-fields\-terminated\-by=\&.\&.\&.\fR,
.\" mysqldump: fields-enclosed-by option
.\" fields-enclosed-by option: mysqldump
\fB\-\-fields\-enclosed\-by=\&.\&.\&.\fR,
.\" mysqldump: fields-optionally-enclosed-by option
.\" fields-optionally-enclosed-by option: mysqldump
\fB\-\-fields\-optionally\-enclosed\-by=\&.\&.\&.\fR,
.\" mysqldump: fields-escaped-by option
.\" fields-escaped-by option: mysqldump
\fB\-\-fields\-escaped\-by=\&.\&.\&.\fR
.sp
These options are used with the
\fB\-\-tab\fR
option and have the same meaning as the corresponding
FIELDS
clauses for
LOAD DATA INFILE\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: first-slave option
.\" first-slave option: mysqldump
\fB\-\-first\-slave\fR
.sp
Removed in MariaDB 5.5\&. Use
\fB\-\-lock\-all\-tables\fR
instead\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: flashback option
.\" flashback option: mysqldump
\fB\-\-flashback\fR,
\fB\-B\fR
.sp
Support flashback mode\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: flush-logs option
.\" flush-logs option: mysqldump
\fB\-\-flush\-logs\fR,
\fB\-F\fR
.sp
Flush the MariaDB server log files before starting the dump\&. This option requires the
RELOAD
privilege\&. If you use this option in combination with the
\fB\-\-all\-databases\fR
option, the logs are flushed
\fIfor each database dumped\fR\&. The exception is when using
\fB\-\-lock\-all\-tables\fR
or
\fB\-\-master\-data\fR: In this case, the logs are flushed only once, corresponding to the moment that all tables are locked\&. If you want your dump and the log flush to happen at exactly the same moment, you should use
\fB\-\-flush\-logs\fR
together with either
\fB\-\-lock\-all\-tables\fR
or
\fB\-\-master\-data\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: flush-privileges option
.\" flush-privileges option: mysqldump
\fB\-\-flush\-privileges\fR
.sp
Send a
FLUSH PRIVILEGES
statement to the server after dumping the
mysql
database\&. This option should be used any time the dump contains the
mysql
database and any other database that depends on the data in the
mysql
database for proper restoration\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: force option
.\" force option: mysqldump
\fB\-\-force\fR,
\fB\-f\fR
.sp
Continue even if an SQL error occurs during a table dump\&.
.sp
One use for this option is to cause
\fBmysqldump\fR
to continue executing even when it encounters a view that has become invalid because the definition refers to a table that has been dropped\&. Without
\fB\-\-force\fR,
\fBmysqldump\fR
exits with an error message\&. With
\fB\-\-force\fR,
\fBmysqldump\fR
prints the error message, but it also writes an SQL comment containing the view definition to the dump output and continues executing\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: gtid option
.\" gtid option: mysqldump
\fB\-\-gtid\fR
.sp
Available from MariaDB 10.0.13, and is used together with \fB\-\-master\-data\fR and \fB\-\-dump\-slave\fR to more conveniently set up a new GTID slave\&. It causes those options to output SQL statements that configure the slave to use the global transaction ID to connect to the master instead of old-style filename/offset positions\&. The old-style positions are still included in comments when \fB\-\-gtid\fR is used; likewise the GTID position is included in comments even if \fB\-\-gtid\fR is not used\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: header option
.\" header option: mysqldump
\fB\-\-header\fR
.sp
Used together with --tab. When enabled, adds header with column names to the top of output txt files.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: hex-blob option
.\" hex-blob option: mysqldump
\fB\-\-hex\-blob\fR
.sp
Dump binary columns using hexadecimal notation (for example, 'abc' becomes
0x616263)\&. The affected data types are
BINARY,
VARBINARY, the
BLOB
types, and
BIT\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: host option
.\" host option: mysqldump
\fB\-\-host=\fR\fB\fIhost_name\fR\fR,
\fB\-h \fR\fB\fIhost_name\fR\fR
.sp
Dump data from the MariaDB server on the given host\&. The default host is
localhost\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: ignore-table option
.\" ignore-table option: mysqldump
\fB\-\-ignore\-table=\fR\fB\fIdb_name\&.tbl_name\fR\fR
.sp
Do not dump the given table, which must be specified using both the database and table names\&. To ignore multiple tables, use this option multiple times\&. This option also can be used to ignore views\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: include-master-host-port option
.\" include-master-host-port option: mysqldump
\fB\-\-include\-master\-host\-port\fR
.sp
Add the MASTER_HOST and MASTER_PORT options for the CHANGE MASTER TO statement when using
the \fB--dump-slave\fR option for a slave dump\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: insert-ignore option
.\" insert-ignore option: mysqldump
\fB\-\-insert\-ignore\fR
.sp
Write
INSERT IGNORE
statements rather than
INSERT
statements\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: lines-terminated-by option
.\" lines-terminated-by option: mysqldump
\fB\-\-lines\-terminated\-by=\&.\&.\&.\fR
.sp
This option is used with the
\fB\-\-tab\fR
option and has the same meaning as the corresponding
LINES
clause for
LOAD DATA INFILE\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: lock-all-tables option
.\" lock-all-tables option: mysqldump
\fB\-\-lock\-all\-tables\fR,
\fB\-x\fR
.sp
Lock all tables across all databases\&. This is achieved by acquiring a global read lock for the duration of the whole dump\&. This option automatically turns off
\fB\-\-single\-transaction\fR
and
\fB\-\-lock\-tables\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: lock-tables option
.\" lock-tables option: mysqldump
\fB\-\-lock\-tables\fR,
\fB\-l\fR
.sp
For each dumped database, lock all tables to be dumped before dumping them\&. The tables are locked with
READ LOCAL
to allow concurrent inserts in the case of
MyISAM
tables\&. For transactional tables such as
InnoDB,
\fB\-\-single\-transaction\fR
is a much better option than
\fB\-\-lock\-tables\fR
because it does not need to lock the tables at all\&.
.sp
Because
\fB\-\-lock\-tables\fR
locks tables for each database separately, this option does not guarantee that the tables in the dump file are logically consistent between databases\&. Tables in different databases may be dumped in completely different states\&.
.sp
Use \fB--skip-lock-tables\fR to disable\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: log-error option
.\" log-error option: mysqldump
\fB\-\-log\-error=\fR\fB\fIfile_name\fR\fR
.sp
Log warnings and errors by appending them to the named file\&. The default is to do no logging\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: log-queries option
.\" log-queries option: mysqldump
\fB\-\-log\-queries\fR\fR
.sp
When restoring the dump, the server will, if logging is turned on, log the queries to the general and slow query log\&.
Defaults to on; use \fB--skip-log-queries\fR to disable\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: master-data option
.\" master-data option: mysqldump
\fB\-\-master\-data[=\fR\fB\fIvalue\fR\fR\fB]\fR
.sp
Use this option to dump a master replication server to produce a dump file that can be used to set up another server as a slave of the master\&. It causes the dump output to include a
CHANGE MASTER TO
statement that indicates the binary log coordinates (file name and position) of the dumped server\&. These are the master server coordinates from which the slave should start replicating after you load the dump file into the slave\&.
.sp
If the option value is 2, the
CHANGE MASTER TO
statement is written as an SQL comment, and thus is informative only; it has no effect when the dump file is reloaded\&. If the option value is 1, the statement is not written as a comment and takes effect when the dump file is reloaded\&. If no option value is specified, the default value is 1\&.
.sp
This option requires the
RELOAD
privilege and the binary log must be enabled\&.
.sp
The
\fB\-\-master\-data\fR
option automatically turns off
\fB\-\-lock\-tables\fR\&. It also turns on
\fB\-\-lock\-all\-tables\fR, unless
\fB\-\-single\-transaction\fR
also is specified\&. In all cases, any action on logs happens at the exact moment of the dump\&.
.sp
It is also possible to set up a slave by dumping an existing slave of the master\&. To do this, use the following procedure on the existing slave:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  1." 4.2
.\}
Stop the slave's SQL thread and get its current status:
.sp
.if n \{\
.RS 4
.\}
.nf
mysql> \fBSTOP SLAVE SQL_THREAD;\fR
mysql> \fBSHOW SLAVE STATUS;\fR
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  2." 4.2
.\}
From the output of the
SHOW SLAVE STATUS
statement, the binary log coordinates of the master server from which the new slave should start replicating are the values of the
Relay_Master_Log_File
and
Exec_Master_Log_Pos
fields\&. Denote those values as
\fIfile_name\fR
and
\fIfile_pos\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  3." 4.2
.\}
Dump the slave server:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-master\-data=2 \-\-all\-databases > dumpfile\fR
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 4.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  4." 4.2
.\}
Restart the slave:
.sp
.if n \{\
.RS 4
.\}
.nf
mysql> \fBSTART SLAVE;\fR
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 5.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  5." 4.2
.\}
On the new slave, load the dump file:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysql < dumpfile\fR
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 6.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  6." 4.2
.\}
On the new slave, set the replication coordinates to those of the master server obtained earlier:
.sp
.if n \{\
.RS 4
.\}
.nf
mysql> \fBCHANGE MASTER TO\fR
    \-> \fBMASTER_LOG_FILE = '\fR\fB\fIfile_name\fR\fR\fB', MASTER_LOG_POS = \fR\fB\fIfile_pos\fR\fR\fB;\fR
.fi
.if n \{\
.RE
.\}
.sp
The
CHANGE MASTER TO
statement might also need other parameters, such as
MASTER_HOST
to point the slave to the correct master server host\&. Add any such parameters as necessary\&.
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: max-allowed-packet option
.\" max-allowed-packet option: mysqldump
\fB\-\-max\-allowed\-packet=\fR\fB\fIlength\fR\fR
.sp
Sets the maximum packet length to send to or receive from server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: max-statement-time option
.\" max-statement-time option: mysqldump
\fB\-\-max\-statement\-time=\fR\fB\fIseconds\fR\fR
.sp
Sets the maximum time any statement can run before being timed out by the server. (Default value is 0 (no limit))\&
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: net-buffer-length option
.\" net-buffer-length option: mysqldump
\fB\-\-net\-buffer\-length=\fR\fB\fIlength\fR\fR
.sp
Sets the buffer size for TCP/IP and socket communication\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: no-autocommit option
.\" no-autocommit option: mysqldump
\fB\-\-no\-autocommit\fR
.sp
Enclose the
INSERT
statements for each dumped table within
SET autocommit = 0
and
COMMIT
statements\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: no-create-db option
.\" no-create-db option: mysqldump
\fB\-\-no\-create\-db\fR,
\fB\-n\fR
.sp
This option suppresses the
CREATE DATABASE
statements that are otherwise included in the output if the
\fB\-\-databases\fR
or
\fB\-\-all\-databases\fR
option is given\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: no-create-info option
.\" no-create-info option: mysqldump
\fB\-\-no\-create\-info\fR,
\fB\-t\fR
.sp
Do not write
CREATE TABLE
statements that re\-create each dumped table\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: no-data option
.\" no-data option: mysqldump
\fB\-\-no\-data\fR,
\fB\-d\fR
.sp
Do not write any table row information (that is, do not dump table contents)\&. This is useful if you want to dump only the
CREATE TABLE
statement for the table (for example, to create an empty copy of the table by loading the dump file)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: no-defaults option
.\" no-defaults option: mysqldump
\fB\-\-no\-defaults\fR
.sp
Do not read default options from any option file\&. This must be given as the first argument\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: no-set-names option
.\" no-set-names option: mysqldump
\fB\-\-no\-set\-names\fR,
\fB\-N\fR
.sp
This has the same effect as
\fB\-\-skip\-set\-charset\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: opt option
.\" opt option: mysqldump
\fB\-\-opt\fR
.sp
This option is shorthand\&. It is the same as specifying
\fB\-\-add\-drop\-table\fR
\fB\-\-add\-locks\fR
\fB\-\-create\-options\fR
\fB\-\-disable\-keys\fR
\fB\-\-extended\-insert\fR
\fB\-\-lock\-tables\fR
\fB\-\-quick\fR
\fB\-\-set\-charset\fR\&. It should give you a fast dump operation and produce a dump file that can be reloaded into a MariaDB server quickly\&.
.sp
\fIThe \fR\fI\fB\-\-opt\fR\fR\fI option is enabled by default\&. Use \fR\fI\fB\-\-skip\-opt\fR\fR\fI to disable it\&.\fR
See the discussion at the beginning of this section for information about selectively enabling or disabling a subset of the options affected by
\fB\-\-opt\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: order-by-primary option
.\" order-by-primary option: mysqldump
\fB\-\-order\-by\-primary\fR
.sp
Dump each table's rows sorted by its primary key, or by its first unique index, if such an index exists\&. This is useful when dumping a
MyISAM
table to be loaded into an
InnoDB
table, but will make the dump operation take considerably longer\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: password option
.\" password option: mysqldump
\fB\-\-password[=\fR\fB\fIpassword\fR\fR\fB]\fR,
\fB\-p[\fR\fB\fIpassword\fR\fR\fB]\fR
.sp
The password to use when connecting to the server\&. If you use the short option form (\fB\-p\fR), you
\fIcannot\fR
have a space between the option and the password\&. If you omit the
\fIpassword\fR
value following the
\fB\-\-password\fR
or
\fB\-p\fR
option on the command line,
\fBmysqldump\fR
prompts for one\&.
.sp
Specifying a password on the command line should be considered insecure\&. You can use an option file to avoid giving the password on the command line\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: pipe option
.\" pipe option: mysqldump
\fB\-\-pipe\fR,
\fB\-W\fR
.sp
On Windows, connect to the server via a named pipe\&. This option applies only if the server supports named\-pipe connections\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: plugin-dir option
.\" plugin-dir option: mysqldump
\fB\-\-plugin\-dir\fR
.sp
Directory for client-side plugins\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: port option
.\" port option: mysqldump
\fB\-\-port=\fR\fB\fIport_num\fR\fR,
\fB\-P \fR\fB\fIport_num\fR\fR
.sp
The TCP/IP port number to use for the connection\&.
Forces --protocol=tcp when specified on the command line without other connection properties\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: protocol option
.\" protocol option: mysqldump
\fB\-\-protocol={TCP|SOCKET|PIPE|MEMORY}\fR
.sp
The connection protocol to use for connecting to the server\&. It is useful when the other connection parameters normally would cause a protocol to be used other than the one you want\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: quick option
.\" quick option: mysqldump
\fB\-\-quick\fR,
\fB\-q\fR
.sp
This option is useful for dumping large tables\&. It forces
\fBmysqldump\fR
to retrieve rows for a table from the server a row at a time rather than retrieving the entire row set and buffering it in memory before writing it out\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: print-defaults option
.\" print-defaults option: mysqldump
\fB\-\-print\-defaults\fR
.sp
Print the program argument list and exit\&. This must be given as the first argument\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: quote-names option
.\" quote-names option: mysqldump
\fB\-\-quote\-names\fR,
\fB\-Q\fR
.sp
Quote identifiers (such as database, table, and column names) within
\(lq`\(rq
characters\&. If the
ANSI_QUOTES
SQL mode is enabled, identifiers are quoted within
\(lq"\(rq
characters\&. This option is enabled by default\&. It can be disabled with
\fB\-\-skip\-quote\-names\fR, but this option should be given after any option such as
\fB\-\-compatible\fR
that may enable
\fB\-\-quote\-names\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: replace option
.\" replace option: mysqldump
\fB\-\-replace\fR
.sp
Write
REPLACE
statements rather than
INSERT
statements\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: result-file option
.\" result-file option: mysqldump
\fB\-\-result\-file=\fR\fB\fIfile_name\fR\fR,
\fB\-r \fR\fB\fIfile_name\fR\fR
.sp
Direct output to a given file\&. This option should be used on Windows to prevent newline
\(lq\en\(rq
characters from being converted to
\(lq\er\en\(rq
carriage return/newline sequences\&. The result file is created and its previous contents overwritten, even if an error occurs while generating the dump\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: routines option
.\" routines option: mysqldump
\fB\-\-routines\fR,
\fB\-R\fR
.sp
Included stored routines (procedures and functions) for the dumped databases in the output\&. Use of this option requires the
SELECT
privilege for the
mysql\&.proc
table\&. The output generated by using
\fB\-\-routines\fR
contains
CREATE PROCEDURE
and
CREATE FUNCTION
statements to re\-create the routines\&. However, these statements do not include attributes such as the routine creation and modification timestamps\&. This means that when the routines are reloaded, they will be created with the timestamps equal to the reload time\&.
.sp
If you require routines to be re\-created with their original timestamp attributes, do not use
\fB\-\-routines\fR\&. Instead, dump and reload the contents of the
mysql\&.proc
table directly, using a MariaDB account that has appropriate privileges for the
mysql
database\&.
.sp
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: set-charset option
.\" set-charset option: mysqldump
\fB\-\-set\-charset\fR
.sp
Add
SET NAMES \fIdefault_character_set\fR
to the output\&. This option is enabled by default\&. To suppress the
SET NAMES
statement, use
\fB\-\-skip\-set\-charset\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: single-transaction option
.\" single-transaction option: mysqldump
\fB\-\-single\-transaction\fR
.sp
This option sends a
START TRANSACTION
SQL statement to the server before dumping data\&. It is useful only with transactional tables such as
InnoDB, because then it dumps the consistent state of the database at the time when
BEGIN
was issued without blocking any applications\&.
.sp
When using this option, you should keep in mind that only
InnoDB
tables are dumped in a consistent state\&. For example, any
MyISAM
or
MEMORY
tables dumped while using this option may still change state\&.
.sp
While a
\fB\-\-single\-transaction\fR
dump is in process, to ensure a valid dump file (correct table contents and binary log coordinates), no other connection should use the following statements:
ALTER TABLE,
CREATE TABLE,
DROP TABLE,
RENAME TABLE,
TRUNCATE TABLE\&. A consistent read is not isolated from those statements, so use of them on a table to be dumped can cause the
SELECT
that is performed by
\fBmysqldump\fR
to retrieve the table contents to obtain incorrect contents or fail\&.
.sp
The
\fB\-\-single\-transaction\fR
option and the
\fB\-\-lock\-tables\fR
option are mutually exclusive because
LOCK TABLES
causes any pending transactions to be committed implicitly\&.
.sp
To dump large tables, you should combine the
\fB\-\-single\-transaction\fR
option with
\fB\-\-quick\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-add-drop-table option
.\" skip-add-drop-table option: mysqldump
\fB\-\-skip\-add\-drop\-table\fR
.sp
Disable the
\fB\-\-add\-drop\-table\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-add-locks option
.\" skip-add-locks option: mysqldump
\fB\-\-skip\-add\-locks\fR
.sp
Disable the
\fB\-\-add\-locks\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-comments option
.\" skip-comments option: mysqldump
\fB\-\-skip\-comments\fR
.sp
Disable the
\fB\-\-comments\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-compact option
.\" skip-compact option: mysqldump
\fB\-\-skip\-compact\fR
.sp
Disable the
\fB\-\-compact\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-disable-keys option
.\" skip-disable-keys option: mysqldump
\fB\-\-skip\-disable\-keys\fR
.sp
Disable the
\fB\-\-disable\-keys\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-extended-insert option
.\" skip-extended-insert option: mysqldump
\fB\-\-skip\-extended\-insert\fR
.sp
Disable the
\fB\-\-extended\-insert\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-opt option
.\" skip-opt option: mysqldump
\fB\-\-skip\-opt\fR
.sp
Disable the
\fB\-\-opt\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-quick option
.\" skip-quick option: mysqldump
\fB\-\-skip\-quick\fR
.sp
Disable the
\fB\-\-quick\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-quote-names option
.\" skip-quote-names option: mysqldump
\fB\-\-skip\-quote\-names\fR
.sp
Disable the
\fB\-\-quote\-names\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-set-charset option
.\" skip-set-charset option: mysqldump
\fB\-\-skip\-set\-charset\fR
.sp
Disable the
\fB\-\-set\-charset\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-triggers option
.\" skip-triggers option: mysqldump
\fB\-\-skip\-triggers\fR
.sp
Disable the
\fB\-\-triggers\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: skip-tz-utc option
.\" skip-tz-utc option: mysqldump
\fB\-\-skip\-tz\-utc\fR
.sp
Disable the
\fB\-\-tz\-utc\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: socket option
.\" socket option: mysqldump
\fB\-\-socket=\fR\fB\fIpath\fR\fR,
\fB\-S \fR\fB\fIpath\fR\fR
.sp
For connections to
localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use\&.
Forces --protocol=socket when specified on the command line without other connection properties; on Windows, forces --protocol=pipe\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL options
.\" SSL options: mysqladmin
\fB\-\-ssl\fR
.sp
Enable SSL for connection (automatically enabled with other flags). Disable with
\fB\-\-skip-ssl\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL CA option
.\" SSL CA option: mysqladmin
\fB\-\-ssl\-ca=\fIname\fR
.sp
CA file in PEM format (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL CA Path option
.\" SSL CA Path option: mysqladmin
\fB\-\-ssl\-capath=\fIname\fR
.sp
CA directory (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL Cert option
.\" SSL Cert option: mysqladmin
\fB\-\-ssl\-cert=\fIname\fR
.sp
X509 cert in PEM format (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL Cipher option
.\" SSL Cipher option: mysqladmin
\fB\-\-ssl\-cipher=\fIname\fR
.sp
SSL cipher to use (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL Key option
.\" SSL Key option: mysqladmin
\fB\-\-ssl\-key=\fIname\fR
.sp
X509 key in PEM format (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL Crl option
.\" SSL CRL option: mysqladmin
\fB\-\-ssl\-crl=\fIname\fR
.sp
Certificate revocation list (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL Crlpath option
.\" SSL Crlpath option: mysqladmin
\fB\-\-ssl\-crlpath=\fIname\fR
.sp
Certificate revocation list path (check OpenSSL docs, implies
\fB\-\-ssl\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: SSL Verify Server Cert option
.\" SSL Verify Server Cert option: mysqladmin
\fB\-\-ssl\-verify\-server\-cert\fR
.sp
Verify server's "Common Name" in its cert against hostname used when connecting. This option is disabled by default\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqladmin: Dump system tables option
.\" Dump system tables option: mysqladmin
\fB\-\-system=\fR\fB\fI{all, users, plugins, udfs, servers, stats, timezones}\fR\fR
.sp
Dump the system tables in the mysql database in a logical form\&. This option is an empty set by default\&.
.sp
One or more options can be listed in comma separated list\&.
.sp
The options here are:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
all \- an alias to enabling all of the below options\&.
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
users \- the users, roles and their grants outputed as \fBCREATE USER\fB, \fBCREATE ROLE\fR, \fBGRANT\fR, and \fBSET DEFAULT ROLE\fR (\fBALTER USER\fR for MySQL-8.0+)\&.
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
plugins \- active plugins of the server outputed as \fBINSTALL PLUGIN\fR\&.
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
udfs \- user define functions outputed as \fBCREATE FUNCTION\fR\&.
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
servers \- remote (federated) servers as \fBCREATE SERVER\fR\&.
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
stats \- statistics tables, InnoDB and Engine Independent Table Statistics (EITS), are dumped as \fBREPLACE INTO\fR (or \fBINSERT IGNORE\fR if \fB\-\-insert\-ignore\fR is specified) statements without (re)creating tables\&.
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
timezones \- timezone related system tables dumped as \fBREPLACE INTO\fR (or \fBINSERT IGNORE\fR if \fB\-\-insert\-ignore\fR is specified) statements without (re)creating tables\&.
.RE
.sp
The format of the output is affected by \fB\-\-replace\fR and \fB\-\-insert\-ignore\fR\&. The \fB\-\-replace\fR option will output \fBCREATE OR REPLACE\fR
forms of SQL, and also \fBDROP IF EXISTS\fR prior to \fBCREATE\fR, if a \fBCREATE OR REPLACE\fR option isn't available.
.sp
With \fB\-\-system=user\fR (or \fBall\fR), and \fB\-\-replace\fR, SQL is generated to generate an error if attempting to import the dump with a connection user that is being replaced within the dump\&.
.sp
The \fB\-\-insert\-ignore\fR option will cause \fBCREATE IF NOT EXIST\fR forms of SQL to generated if available.
.sp
For stats, and timezones, \fB\-\-replace\fR and \fB\-\-insert\-ignore\fR have the usual effects.
.sp
Enabling specific options here will cause the relevant tables in the mysql database to be ignored when dumping the mysql database or \fB\-\-all\-databases\fR\&.
.sp
To help in migrating from MySQL to MariaDB, this option is designed to be able to dump system information from MySQL-5\&.7 and 8\&.0 servers\&. SQL generated is also experimentally compatible with MySQL-5\&.7/8\&.0. Mappings of implementation specific grants/plugins isn't always one-to-one however between MariaDB and MySQL and will require manual changes\&.
.sp
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: tab option
.\" tab option: mysqldump
\fB\-\-tab=\fR\fB\fIpath\fR\fR,
\fB\-T \fR\fB\fIpath\fR\fR
.sp
Produce tab\-separated text\-format data files\&. For each dumped table,
\fBmysqldump\fR
creates a
\fItbl_name\fR\&.sql
file that contains the
CREATE TABLE
statement that creates the table, and the server writes a
\fItbl_name\fR\&.txt
file that contains its data\&. The option value is the directory in which to write the files\&.
.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 should be used only when
\fBmysqldump\fR
is run on the same machine as the
\fBmysqld\fR
server\&. You must have the
FILE
privilege, and the server must have permission to write files in the directory that you specify\&.
.sp .5v
.RE
By default, the
\&.txt
data files are formatted using tab characters between column values and a newline at the end of each line\&. The format can be specified explicitly using the
\fB\-\-fields\-\fR\fB\fIxxx\fR\fR
and
\fB\-\-lines\-terminated\-by\fR
options\&.
.sp
Column values are converted to the character set specified by the
\fB\-\-default\-character\-set\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: tables option
.\" tables option: mysqldump
\fB\-\-tables\fR
.sp
Override the
\fB\-\-databases\fR
or
\fB\-B\fR
option\&.
\fBmysqldump\fR
regards all name arguments following the option as table names\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: triggers option
.\" triggers option: mysqldump
\fB\-\-triggers\fR
.sp
Include triggers for each dumped table in the output\&. This option is enabled by default; disable it with
\fB\-\-skip\-triggers\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: tz-utc option
.\" tz-utc option: mysqldump
\fB\-\-tz\-utc\fR
.sp
This option enables
TIMESTAMP
columns to be dumped and reloaded between servers in different time zones\&.
\fBmysqldump\fR
sets its connection time zone to UTC and adds
SET TIME_ZONE='+00:00'
to the dump file\&. Without this option,
TIMESTAMP
columns are dumped and reloaded in the time zones local to the source and destination servers, which can cause the values to change if the servers are in different time zones\&.
\fB\-\-tz\-utc\fR
also protects against changes due to daylight saving time\&.
\fB\-\-tz\-utc\fR
is enabled by default\&. To disable it, use
\fB\-\-skip\-tz\-utc\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: user option
.\" user option: mysqldump
\fB\-\-user=\fR\fB\fIuser_name\fR\fR,
\fB\-u \fR\fB\fIuser_name\fR\fR
.sp
The MariaDB user name to use when connecting to the server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: verbose option
.\" verbose option: mysqldump
\fB\-\-verbose\fR,
\fB\-v\fR
.sp
Verbose mode\&. Print more information about what the program does\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: version option
.\" version option: mysqldump
\fB\-\-version\fR,
\fB\-V\fR
.sp
Display version information and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: where option
.\" where option: mysqldump
\fB\-\-where='\fR\fB\fIwhere_condition\fR\fR\fB'\fR,
\fB\-w '\fR\fB\fIwhere_condition\fR\fR\fB'\fR
.sp
Dump only rows selected by the given
WHERE
condition\&. Quotes around the condition are mandatory if it contains spaces or other characters that are special to your command interpreter\&.
.sp
Examples:
.sp
.if n \{\
.RS 4
.\}
.nf
\-\-where="user='jimf'"
\-w"userid>1"
\-w"userid<1"
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqldump: xml option
.\" xml option: mysqldump
\fB\-\-xml\fR,
\fB\-X\fR
.sp
Write dump output as well\-formed XML\&.
.sp
\fBNULL\fR\fB, \fR\fB'NULL'\fR\fB, and Empty Values\fR: For a column named
\fIcolumn_name\fR, the NULL value, an empty string, and the string value 'NULL'
are distinguished from one another in the output generated by this option as follows\&.
.TS
allbox tab(:);
l lx.
T{
\fBValue\fR:
T}:T{
\fBXML Representation\fR:
T}
T{
NULL (\fIunknown value\fR)
T}:T{
<field name="\fIcolumn_name\fR" xsi:nil="true" />
T}
T{
\(aq\(aq (\fIempty string\fR)
T}:T{
<field name="\fIcolumn_name\fR"></field>
T}
T{
\(aqNULL\(aq (\fIstring value\fR)
T}:T{
<field name="\fIcolumn_name\fR">NULL</field>
T}
.TE
.sp 1
The output from the
\fBmysql\fR
client when run using the
\fB\-\-xml\fR
option also follows the preceding rules\&. (See
the section called \(lqMYSQL OPTIONS\(rq\&.)
.sp
XML output from
\fBmysqldump\fR
includes the XML namespace, as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-xml \-u root world City\fR
<?xml version="1\&.0"?>
<mysqldump xmlns:xsi="http://www\&.w3\&.org/2001/XMLSchema\-instance">
<database name="world">
<table_structure name="City">
<field Field="ID" Type="int(11)" Null="NO" Key="PRI" Extra="auto_increment" />
<field Field="Name" Type="char(35)" Null="NO" Key="" Default="" Extra="" />
<field Field="CountryCode" Type="char(3)" Null="NO" Key="" Default="" Extra="" />
<field Field="District" Type="char(20)" Null="NO" Key="" Default="" Extra="" />
<field Field="Population" Type="int(11)" Null="NO" Key="" Default="0" Extra="" />
<key Table="City" Non_unique="0" Key_name="PRIMARY" Seq_in_index="1" Column_name="ID"
Collation="A" Cardinality="4079" Null="" Index_type="BTREE" Comment="" />
<options Name="City" Engine="MyISAM" Version="10" Row_format="Fixed" Rows="4079"
Avg_row_length="67" Data_length="273293" Max_data_length="18858823439613951"
Index_length="43008" Data_free="0" Auto_increment="4080"
Create_time="2007\-03\-31 01:47:01" Update_time="2007\-03\-31 01:47:02"
Collation="latin1_swedish_ci" Create_options="" Comment="" />
</table_structure>
<table_data name="City">
<row>
<field name="ID">1</field>
<field name="Name">Kabul</field>
<field name="CountryCode">AFG</field>
<field name="District">Kabol</field>
<field name="Population">1780000</field>
</row>
\fI\&.\&.\&.\fR
<row>
<field name="ID">4079</field>
<field name="Name">Rafah</field>
<field name="CountryCode">PSE</field>
<field name="District">Rafah</field>
<field name="Population">92020</field>
</row>
</table_data>
</database>
</mysqldump>
.fi
.if n \{\
.RE
.\}
.sp
.RE
.PP
You can also set the following variables by using
\fB\-\-\fR\fB\fIvar_name\fR\fR\fB=\fR\fB\fIvalue\fR\fR
syntax:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
max_allowed_packet
.sp
The maximum size of the buffer for client/server communication\&. The maximum is 1GB\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
max_statement_time
.sp
A query that has taken more than max_statement_time seconds will be aborted and the backup will
fail\&. The argument will be treated as a decimal value with microsecond precision\&. A value
of 0 (default) means no timeout\&. The maximum timeout is 31536000 seconds\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
net_buffer_length
.sp
The initial size of the buffer for client/server communication\&. When creating multiple\-row
INSERT
statements (as with the
\fB\-\-extended\-insert\fR
or
\fB\-\-opt\fR
option),
\fBmysqldump\fR
creates rows up to
net_buffer_length
length\&. If you increase this variable, you should also ensure that the
net_buffer_length
variable in the MariaDB server is at least this large\&.
.RE
.PP
A common use of
\fBmysqldump\fR
is for making a backup of an entire database:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \fR\fB\fIdb_name\fR\fR\fB > \fR\fB\fIbackup\-file\&.sql\fR\fR
.fi
.if n \{\
.RE
.\}
.PP
You can load the dump file back into the server like this:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysql \fR\fB\fIdb_name\fR\fR\fB < \fR\fB\fIbackup\-file\&.sql\fR\fR
.fi
.if n \{\
.RE
.\}
.PP
Or like this:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysql \-e "source \fR\fB\fI/path\-to\-backup/backup\-file\&.sql\fR\fR\fB" \fR\fB\fIdb_name\fR\fR
.fi
.if n \{\
.RE
.\}
.PP
\fBmysqldump\fR
is also very useful for populating databases by copying data from one MariaDB server to another:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-opt \fR\fB\fIdb_name\fR\fR\fB | mysql \-\-host=\fR\fB\fIremote_host\fR\fR\fB \-C \fR\fB\fIdb_name\fR\fR
.fi
.if n \{\
.RE
.\}
.PP
It is possible to dump several databases with one command:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-databases \fR\fB\fIdb_name1\fR\fR\fB [\fR\fB\fIdb_name2\fR\fR\fB \&.\&.\&.] > my_databases\&.sql\fR
.fi
.if n \{\
.RE
.\}
.PP
To dump all databases, use the
\fB\-\-all\-databases\fR
option:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-all\-databases > all_databases\&.sql\fR
.fi
.if n \{\
.RE
.\}
.PP
For
InnoDB
tables,
\fBmysqldump\fR
provides a way of making an online backup:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-all\-databases \-\-single\-transaction > all_databases\&.sql\fR
.fi
.if n \{\
.RE
.\}
.PP
This backup acquires a global read lock on all tables (using
FLUSH TABLES WITH READ LOCK) at the beginning of the dump\&. As soon as this lock has been acquired, the binary log coordinates are read and the lock is released\&. If long updating statements are running when the
FLUSH
statement is issued, the MariaDB server may get stalled until those statements finish\&. After that, the dump becomes lock free and does not disturb reads and writes on the tables\&. If the update statements that the MariaDB server receives are short (in terms of execution time), the initial lock period should not be noticeable, even with many updates\&.
.PP
For point\-in\-time recovery (also known as
\(lqroll\-forward,\(rq
when you need to restore an old backup and replay the changes that happened since that backup), it is often useful to rotate the binary log or at least know the binary log coordinates to which the dump corresponds:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-all\-databases \-\-master\-data=2 > all_databases\&.sql\fR
.fi
.if n \{\
.RE
.\}
.PP
Or:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-all\-databases \-\-flush\-logs \-\-master\-data=2\fR
              \fB> all_databases\&.sql\fR
.fi
.if n \{\
.RE
.\}
.PP
The
\fB\-\-master\-data\fR
and
\fB\-\-single\-transaction\fR
options can be used simultaneously, which provides a convenient way to make an online backup suitable for use prior to point\-in\-time recovery if tables are stored using the
InnoDB
storage engine\&.
.PP
.\" mysqldump: views
.\" mysqldump: problems
.\" mysqldump: workarounds
.PP
If you encounter problems backing up views, please read the section that covers restrictions on views which describes a workaround for backing up views when this fails due to insufficient privileges\&.
.SH "COPYRIGHT"
.br
.PP
Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc., 2010-2020 MariaDB Foundation
.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 02110-1335 USA or see http://www.gnu.org/licenses/.
.sp
.SH "SEE ALSO"
For more information, please refer to the MariaDB Knowledge Base, available online at https://mariadb.com/kb/
.SH AUTHOR
MariaDB Foundation (http://www.mariadb.org/).