MYSQLDUMP(1)               MariaDB Database System              MYSQLDUMP(1)

NAME         top

       mysqldump - a database backup program

SYNOPSIS         top

       mysqldump [options] [db_name [tbl_name ...]]

DESCRIPTION         top

       The mysqldump 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,
       mysqldump can also be used to generate files in CSV, other delimited
       text, or XML format.

       If you are doing a backup on the server and your tables all are
       MyISAM tables, consider using the mysqlhotcopy instead because it can
       accomplish faster backups and faster restores. See mysqlhotcopy(1).

       There are three general ways to invoke mysqldump:

           shell> mysqldump [options] db_name [tbl_name ...]
           shell> mysqldump [options] --databases db_name ...
           shell> mysqldump [options] --all-databases

       If you do not name any tables following db_name or if you use the
       --databases or --all-databases option, entire databases are dumped.

       mysqldump 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 --skip-lock-tables

       To see a list of the options your version of mysqldump supports,
       execute mysqldump --help.

       Some mysqldump options are shorthand for groups of other options:

       ·   Use of --opt is the same as specifying --add-drop-table,
           --add-locks, --create-options, --disable-keys, --extended-insert,
           --lock-tables, --quick, and --set-charset. All of the options
           that --opt stands for also are on by default because --opt is on
           by default.

       ·   Use of --compact is the same as specifying --skip-add-drop-table,
           --skip-add-locks, --skip-comments, --skip-disable-keys, and
           --skip-set-charset options.

       To reverse the effect of a group option, uses its --skip-xxx form
       (--skip-opt or --skip-compact). 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:

       ·   To select the effect of --opt except for some features, use the
           --skip option for each feature. To disable extended inserts and
           memory buffering, use --opt --skip-extended-insert --skip-quick.
           (Actually, --skip-extended-insert --skip-quick is sufficient
           because --opt is on by default.)

       ·   To reverse --opt for all features except index disabling and
           table locking, use --skip-opt --disable-keys --lock-tables.

       When you selectively enable or disable the effect of a group option,
       order is important because options are processed first to last. For
       example, --disable-keys --lock-tables --skip-opt would not have the
       intended effect; it is the same as --skip-opt by itself.

       mysqldump 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 --quick
       option (or --opt, which enables --quick). The --opt option (and hence
       --quick) is enabled by default, so to enable memory buffering, use

       If you are using a recent version of mysqldump to generate a dump to
       be reloaded into a very old MySQL server, you should not use the
       --opt or --extended-insert option. Use --skip-opt instead.

       mysqldump supports the following options, which can be specified on
       the command line or in the [mysqldump] and [client] option file
       groups.  mysqldump also supports the options for processing option

       ·   --help, -?

           Display a help message and exit.

       ·   --add-drop-database

           Add a DROP DATABASE statement before each CREATE DATABASE
           statement. This option is typically used in conjunction with the
           --all-databases or --databases option because no CREATE DATABASE
           statements are written unless one of those options is specified.

       ·   --add-drop-table

           Add a DROP TABLE statement before each CREATE TABLE statement.

       ·   --add-locks

           Surround each table dump with LOCK TABLES and UNLOCK TABLES
           statements. This results in faster inserts when the dump file is

       ·   --all-databases, -A

           Dump all tables in all databases. This is the same as using the
           --databases option and naming all the databases on the command

       ·   --all-tablespaces, -Y

           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 mysqldump. This option is
           currently relevant only to MySQL Cluster tables.

       ·   --allow-keywords

           Allow creation of column names that are keywords. This works by
           prefixing each column name with the table name.

       ·   --apply-slave-statements

           Adds 'STOP SLAVE' prior to 'CHANGE MASTER' and 'START SLAVE' to
           bottom of dump.

       ·   --character-sets-dir=path

           The directory where character sets are installed.

       ·   --comments, -i

           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

       ·   --compact

           Produce more compact output. This option enables the
           --skip-add-drop-table, --skip-add-locks, --skip-comments,
           --skip-disable-keys, and --skip-set-charset options.

       ·   --compatible=name

           Produce output that is more compatible with other database
           systems or with older MySQL servers. The value of name 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.

           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,
           --compatible=oracle does not map data types to Oracle types or
           use Oracle comment syntax.

       ·   --complete-insert, -c

           Use complete INSERT statements that include column names.

       ·   --compress, -C

           Compress all information sent between the client and the server
           if both support compression.

       ·   --create-options, -a

           Include all MariaDB-specific table options in the CREATE TABLE
           statements. Use --skip-create-options to disable.

       ·   --databases, -B

           Dump several databases. Normally, mysqldump 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.

       ·   --debug[=debug_options], -# [debug_options]

           Write a debugging log. A typical debug_options string is
           ´d:t:o,file_name´. The default value is

       ·   --debug-check

           Print some debugging information when the program exits.

       ·   --debug-info

           Print debugging information and memory and CPU usage statistics
           when the program exits.

       ·   --default-auth

           Default authentication client-side plugin to use.

       ·   --default-character-set=charset_name

           Use charset_name as the default character set. If no character
           set is specified, mysqldump uses utf8.

       ·   --defaults-extra-file=filename

           Set filename as the file to read default options from after the
           global defaults files has been read.  Must be given as first

       ·   --defaults-file=filename

           Set filename as the file to read default options from, override
           global defaults files.  Must be given as first option.

       ·   --defaults-group-suffix=str,

           Also read groups with a suffix of str. 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].

       ·   --delayed-insert

           Write INSERT DELAYED statements rather than INSERT statements.

       ·   --delete-master-logs

           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 --master-data.

       ·   --disable-keys, -K

           For each table, surround the INSERT statements with /*!40000
           ALTER TABLE tbl_name DISABLE KEYS */; and /*!40000 ALTER TABLE
           tbl_name 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.

       ·   --dump-date

           If the --comments option is given, mysqldump produces a comment
           at the end of the dump of the following form:

               -- Dump completed on DATE

           However, the date causes dump files taken at different times to
           appear to be different, even if the data are otherwise identical.
           --dump-date and --skip-dump-date control whether the date is
           added to the comment. The default is --dump-date (include the
           date in the comment).  --skip-dump-date suppresses date printing

       ·   --dump-slave[=value]

           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.

       ·   --events, -E

           Include Event Scheduler events for the dumped databases in the

       ·   --extended-insert, -e

           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.

       ·   --fields-terminated-by=..., --fields-enclosed-by=...,
           --fields-optionally-enclosed-by=..., --fields-escaped-by=...

           These options are used with the --tab option and have the same
           meaning as the corresponding FIELDS clauses for LOAD DATA INFILE.

       ·   --first-slave

           Removed in MariaDB 5.5. Use --lock-all-tables instead.

       ·   --flush-logs, -F

           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 --all-databases option, the logs are flushed
           for each database dumped. The exception is when using
           --lock-all-tables or --master-data: 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 --flush-logs together
           with either --lock-all-tables or --master-data.

       ·   --flush-privileges

           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.

       ·   --force, -f

           Continue even if an SQL error occurs during a table dump.

           One use for this option is to cause mysqldump 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 --force, mysqldump exits with an error message. With
           --force, mysqldump prints the error message, but it also writes
           an SQL comment containing the view definition to the dump output
           and continues executing.

       ·   --gtid

           Available from MariaDB 10.0.13, and is used together with
           --master-data and --dump-slave 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 --gtid is
           used; likewise the GTID position is included in comments even if
           --gtid is not used.

       ·   --hex-blob

           Dump binary columns using hexadecimal notation (for example,
           ´abc´ becomes 0x616263). The affected data types are BINARY,
           VARBINARY, the BLOB types, and BIT.

       ·   --host=host_name, -h host_name

           Dump data from the MariaDB server on the given host. The default
           host is localhost.

       ·   --ignore-table=db_name.tbl_name

           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

       ·   --include-master-host-port

           Add the MASTER_HOST and MASTER_PORT options for the CHANGE MASTER
           TO statement when using the --dump-slave option for a slave dump.

       ·   --insert-ignore

           Write INSERT IGNORE statements rather than INSERT statements.

       ·   --lines-terminated-by=...

           This option is used with the --tab option and has the same
           meaning as the corresponding LINES clause for LOAD DATA INFILE.

       ·   --lock-all-tables, -x

           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 --single-transaction and

       ·   --lock-tables, -l

           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, --single-transaction is a
           much better option than --lock-tables because it does not need to
           lock the tables at all.

           Because --lock-tables 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.

           Use --skip-lock-tables to disable.

       ·   --log-error=file_name

           Log warnings and errors by appending them to the named file. The
           default is to do no logging.

       ·   --log-queries

           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 --skip-log-queries to disable.

       ·   --master-data[=value]

           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.

           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.

           This option requires the RELOAD privilege and the binary log must
           be enabled.

           The --master-data option automatically turns off --lock-tables.
           It also turns on --lock-all-tables, unless --single-transaction
           also is specified. In all cases, any action on logs happens at
           the exact moment of the dump.

           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:

            1. Stop the slave´s SQL thread and get its current status:

                   mysql> STOP SLAVE SQL_THREAD;
                   mysql> SHOW SLAVE STATUS;

            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 file_name and file_pos.

            3. Dump the slave server:

                   shell> mysqldump --master-data=2 --all-databases > dumpfile

            4. Restart the slave:

                   mysql> START SLAVE;

            5. On the new slave, load the dump file:

                   shell> mysql < dumpfile

            6. On the new slave, set the replication coordinates to those of
               the master server obtained earlier:

                   mysql> CHANGE MASTER TO
                       -> MASTER_LOG_FILE = ´file_name´, MASTER_LOG_POS = file_pos;

               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

       ·   --max-allowed-packet=length

           Sets the maximum packet length to send to or receive from server.

       ·   --net-buffer-length=length

           Sets the buffer size for TCP/IP and socket communication.

       ·   --no-autocommit

           Enclose the INSERT statements for each dumped table within SET
           autocommit = 0 and COMMIT statements.

       ·   --no-create-db, -n

           This option suppresses the CREATE DATABASE statements that are
           otherwise included in the output if the --databases or
           --all-databases option is given.

       ·   --no-create-info, -t

           Do not write CREATE TABLE statements that re-create each dumped

       ·   --no-data, -d

           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).

       ·   --no-defaults

           Do not read default options from any option file. This must be
           given as the first argument.

       ·   --no-set-names, -N

           This has the same effect as --skip-set-charset.

       ·   --opt

           This option is shorthand. It is the same as specifying
           --add-drop-table --add-locks --create-options --disable-keys
           --extended-insert --lock-tables --quick --set-charset. It should
           give you a fast dump operation and produce a dump file that can
           be reloaded into a MariaDB server quickly.

           The --opt option is enabled by default. Use --skip-opt to disable
           it.  See the discussion at the beginning of this section for
           information about selectively enabling or disabling a subset of
           the options affected by --opt.

       ·   --order-by-primary

           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.

       ·   --password[=password], -p[password]

           The password to use when connecting to the server. If you use the
           short option form (-p), you cannot have a space between the
           option and the password. If you omit the password value following
           the --password or -p option on the command line, mysqldump
           prompts for one.

           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.

       ·   --pipe, -W

           On Windows, connect to the server via a named pipe. This option
           applies only if the server supports named-pipe connections.

       ·   --plugin-dir

           Directory for client-side plugins.

       ·   --port=port_num, -P port_num

           The TCP/IP port number to use for the connection.

       ·   --protocol={TCP|SOCKET|PIPE|MEMORY}

           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.

       ·   --quick, -q

           This option is useful for dumping large tables. It forces
           mysqldump 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.

       ·   --print-defaults

           Print the program argument list and exit. This must be given as
           the first argument.

       ·   --quote-names, -Q

           Quote identifiers (such as database, table, and column names)
           within “`” characters. If the ANSI_QUOTES SQL mode is enabled,
           identifiers are quoted within “"” characters. This option is
           enabled by default. It can be disabled with --skip-quote-names,
           but this option should be given after any option such as
           --compatible that may enable --quote-names.

       ·   --replace

           Write REPLACE statements rather than INSERT statements.

       ·   --result-file=file_name, -r file_name

           Direct output to a given file. This option should be used on
           Windows to prevent newline “\n” characters from being converted
           to “\r\n” carriage return/newline sequences. The result file is
           created and its previous contents overwritten, even if an error
           occurs while generating the dump.

       ·   --routines, -R

           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 --routines 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.

           If you require routines to be re-created with their original
           timestamp attributes, do not use --routines. Instead, dump and
           reload the contents of the mysql.proc table directly, using a
           MariaDB account that has appropriate privileges for the mysql

       ·   --set-charset

           Add SET NAMES default_character_set to the output. This option is
           enabled by default. To suppress the SET NAMES statement, use

       ·   --single-transaction

           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

           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

           While a --single-transaction dump is in process, to ensure a
           valid dump file (correct table contents and binary log
           coordinates), no other connection should use the following
           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 mysqldump to retrieve the table
           contents to obtain incorrect contents or fail.

           The --single-transaction option and the --lock-tables option are
           mutually exclusive because LOCK TABLES causes any pending
           transactions to be committed implicitly.

           To dump large tables, you should combine the --single-transaction
           option with --quick.

       ·   --skip-add-drop-table

           Disable the --add-drop-table option.

       ·   --skip-add-locks

           Disable the --add-locks option.

       ·   --skip-comments

           Disable the --comments option.

       ·   --skip-compact

           Disable the --compact option.

       ·   --skip-disable-keys

           Disable the --disable-keys option.

       ·   --skip-extended-insert

           Disable the --extended-insert option.

       ·   --skip-opt

           Disable the --opt option.

       ·   --skip-quick

           Disable the --quick option.

       ·   --skip-quote-names

           Disable the --quote-names option.

       ·   --skip-set-charset

           Disable the --set-charset option.

       ·   --skip-triggers

           Disable the --triggers option.

       ·   --skip-tz-utc

           Disable the --tz-utc option.

       ·   --socket=path, -S path

           For connections to localhost, the Unix socket file to use, or, on
           Windows, the name of the named pipe to use.

       ·   --ssl

           Enable SSL for connection (automatically enabled with other
           flags). Disable with --skip-ssl.

       ·   --ssl-ca=name

           CA file in PEM format (check OpenSSL docs, implies --ssl).

       ·   --ssl-capath=name

           CA directory (check OpenSSL docs, implies --ssl).

       ·   --ssl-cert=name

           X509 cert in PEM format (check OpenSSL docs, implies --ssl).

       ·   --ssl-cipher=name

           SSL cipher to use (check OpenSSL docs, implies --ssl).

       ·   --ssl-key=name

           X509 key in PEM format (check OpenSSL docs, implies --ssl).

       ·   --ssl-crl=name

           Certificate revocation list (check OpenSSL docs, implies --ssl).

       ·   --ssl-crlpath=name

           Certificate revocation list path (check OpenSSL docs, implies

       ·   --ssl-verify-server-cert

           Verify server's "Common Name" in its cert against hostname used
           when connecting. This option is disabled by default.

       ·   --tab=path, -T path

           Produce tab-separated text-format data files. For each dumped
           table, mysqldump creates a tbl_name.sql file that contains the
           CREATE TABLE statement that creates the table, and the server
           writes a tbl_name.txt file that contains its data. The option
           value is the directory in which to write the files.

               This option should be used only when mysqldump is run on the
               same machine as the mysqld server. You must have the FILE
               privilege, and the server must have permission to write files
               in the directory that you specify.
           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
           --fields-xxx and --lines-terminated-by options.

           Column values are converted to the character set specified by the
           --default-character-set option.

       ·   --tables

           Override the --databases or -B option.  mysqldump regards all
           name arguments following the option as table names.

       ·   --triggers

           Include triggers for each dumped table in the output. This option
           is enabled by default; disable it with --skip-triggers.

       ·   --tz-utc

           This option enables TIMESTAMP columns to be dumped and reloaded
           between servers in different time zones.  mysqldump 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.  --tz-utc also protects
           against changes due to daylight saving time.  --tz-utc is enabled
           by default. To disable it, use --skip-tz-utc.

       ·   --user=user_name, -u user_name

           The MariaDB user name to use when connecting to the server.

       ·   --verbose, -v

           Verbose mode. Print more information about what the program does.

       ·   --version, -V

           Display version information and exit.

       ·   --where=´where_condition´, -w ´where_condition´

           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.



       ·   --xml, -X

           Write dump output as well-formed XML.

           NULL, ´NULL´, and Empty Values: For a column named column_name,
           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.

           │Value:                │ XML Representation:                     │
           │NULL (unknown value)  │ <field name="column_name"               │
           │                      │ xsi:nil="true" />                       │
           │´´ (empty string)     │ <field name="column_name"></field>      │
           │´NULL´ (string value) │ <field name="column_name">NULL</field>  │
           The output from the mysql client when run using the --xml option
           also follows the preceding rules. (See the section called “MYSQL

           XML output from mysqldump includes the XML namespace, as shown

               shell> mysqldump --xml -u root world City
               <?xml version="1.0"?>
               <mysqldump xmlns:xsi="">
               <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_data name="City">
               <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>
               <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>

       You can also set the following variables by using --var_name=value

       ·   max_allowed_packet

           The maximum size of the buffer for client/server communication.
           The maximum is 1GB.

       ·   net_buffer_length

           The initial size of the buffer for client/server communication.
           When creating multiple-row INSERT statements (as with the
           --extended-insert or --opt option), mysqldump 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.

       A common use of mysqldump is for making a backup of an entire

           shell> mysqldump db_name > backup-file.sql

       You can load the dump file back into the server like this:

           shell> mysql db_name < backup-file.sql

       Or like this:

           shell> mysql -e "source /path-to-backup/backup-file.sql" db_name

       mysqldump is also very useful for populating databases by copying
       data from one MariaDB server to another:

           shell> mysqldump --opt db_name | mysql --host=remote_host -C db_name

       It is possible to dump several databases with one command:

           shell> mysqldump --databases db_name1 [db_name2 ...] > my_databases.sql

       To dump all databases, use the --all-databases option:

           shell> mysqldump --all-databases > all_databases.sql

       For InnoDB tables, mysqldump provides a way of making an online

           shell> mysqldump --all-databases --single-transaction > all_databases.sql

       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.

       For point-in-time recovery (also known as “roll-forward,” 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:

           shell> mysqldump --all-databases --master-data=2 > all_databases.sql


           shell> mysqldump --all-databases --flush-logs --master-data=2
                         > all_databases.sql

       The --master-data and --single-transaction 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.

       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.

COPYRIGHT         top

       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.,
       2010-2015 MariaDB Foundation

       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.

       This documentation is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       General Public License for more details.

       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

NOTES         top

        1. Bug#30123

SEE ALSO         top

       For more information, please refer to the MariaDB Knowledge Base,
       available online at

AUTHOR         top

       MariaDB Foundation (

COLOPHON         top

       This page is part of the MariaDB (MariaDB database server) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, see
       ⟨⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨⟩ on 2018-10-29.  (At that time,
       the date of the most recent commit that was found in the repository
       was 2018-10-21.)  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-to-
       date source for the page, or you have corrections or improvements to
       the information in this COLOPHON (which is not part of the original
       manual page), send a mail to

MariaDB 10.1                     14/12/2015                     MYSQLDUMP(1)

Pages that refer to this page: mysql(1)