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'\" t
.\" Title: mysqlbinlog
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 11/29/2021
.\" Manual: MySQL Database System
.\" Source: MySQL 5.7
.\" Language: English
.\"
.TH "MYSQLBINLOG" "1" "11/29/2021" "MySQL 5\&.7" "MySQL Database System"
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.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
mysqlbinlog \- utility for processing binary log files
.SH "SYNOPSIS"
.HP \w'\fBmysqlbinlog\ [\fR\fBoptions\fR\fB]\ \fR\fB\fIlog_file\fR\fR\fB\ \&.\&.\&.\fR\ 'u
\fBmysqlbinlog [\fR\fBoptions\fR\fB] \fR\fB\fIlog_file\fR\fR\fB \&.\&.\&.\fR
.SH "DESCRIPTION"
.PP
The server\*(Aqs binary log consists of files containing
\(lqevents\(rq
that describe modifications to database contents\&. The server writes these files in binary format\&. To display their contents in text format, use the
\fBmysqlbinlog\fR
utility\&. You can also use
\fBmysqlbinlog\fR
to display the contents of relay log files written by a replica server in a replication setup because relay logs have the same format as binary logs\&. The binary log and relay log are discussed further in
Section\ \&5.4.4, \(lqThe Binary Log\(rq, and
Section\ \&16.2.4, \(lqRelay Log and Replication Metadata Repositories\(rq\&.
.PP
Invoke
\fBmysqlbinlog\fR
like this:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog [\fIoptions\fR] \fIlog_file\fR \&.\&.\&.
.fi
.if n \{\
.RE
.\}
.PP
For example, to display the contents of the binary log file named
binlog\&.000003, use this command:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.0000003
.fi
.if n \{\
.RE
.\}
.PP
The output includes events contained in
binlog\&.000003\&. For statement\-based logging, event information includes the SQL statement, the ID of the server on which it was executed, the timestamp when the statement was executed, how much time it took, and so forth\&. For row\-based logging, the event indicates a row change rather than an SQL statement\&. See
Section\ \&16.2.1, \(lqReplication Formats\(rq, for information about logging modes\&.
.PP
Events are preceded by header comments that provide additional information\&. For example:
.sp
.if n \{\
.RS 4
.\}
.nf
# at 141
#100309 9:28:36 server id 123 end_log_pos 245
Query thread_id=3350 exec_time=11 error_code=0
.fi
.if n \{\
.RE
.\}
.PP
In the first line, the number following
at
indicates the file offset, or starting position, of the event in the binary log file\&.
.PP
The second line starts with a date and time indicating when the statement started on the server where the event originated\&. For replication, this timestamp is propagated to replica servers\&.
server id
is the
server_id
value of the server where the event originated\&.
end_log_pos
indicates where the next event starts (that is, it is the end position of the current event + 1)\&.
thread_id
indicates which thread executed the event\&.
exec_time
is the time spent executing the event, on a source server\&. On a replica, it is the difference of the end execution time on the replica minus the beginning execution time on the source\&. The difference serves as an indicator of how much replication lags behind the source\&.
error_code
indicates the result from executing the event\&. Zero means that no error occurred\&.
.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
.PP
When using event groups, the file offsets of events may be grouped together and the comments of events may be grouped together\&. Do not mistake these grouped events for blank file offsets\&.
.sp .5v
.RE
.PP
The output from
\fBmysqlbinlog\fR
can be re\-executed (for example, by using it as input to
\fBmysql\fR) to redo the statements in the log\&. This is useful for recovery operations after an unexpected server exit\&. For other usage examples, see the discussion later in this section and in
Section\ \&7.5, \(lqPoint-in-Time (Incremental) Recovery\(rq\&.
.PP
Normally, you use
\fBmysqlbinlog\fR
to read binary log files directly and apply them to the local MySQL server\&. It is also possible to read binary logs from a remote server by using the
\fB\-\-read\-from\-remote\-server\fR
option\&. To read remote binary logs, the connection parameter options can be given to indicate how to connect to the server\&. These options are
\fB\-\-host\fR,
\fB\-\-password\fR,
\fB\-\-port\fR,
\fB\-\-protocol\fR,
\fB\-\-socket\fR, and
\fB\-\-user\fR\&.
.PP
When running
\fBmysqlbinlog\fR
against a large binary log, be careful that the filesystem has enough space for the resulting files\&. To configure the directory that
\fBmysqlbinlog\fR
uses for temporary files, use the
TMPDIR
environment variable\&.
.PP
\fBmysqlbinlog\fR
sets the value of
pseudo_slave_mode
to true before executing any SQL statements\&. This system variable affects the handling of XA transactions\&.
.PP
\fBmysqlbinlog\fR
supports the following options, which can be specified on the command line or in the
[mysqlbinlog]
and
[client]
groups of an option file\&. For information about option files used by MySQL programs, see
Section\ \&4.2.2.2, \(lqUsing Option Files\(rq\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-help\fR,
\fB\-?\fR
Display a help message and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-base64\-output=\fR\fB\fIvalue\fR\fR
This option determines when events should be displayed encoded as base\-64 strings using
BINLOG
statements\&. The option has these permissible values (not case\-sensitive):
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
AUTO
("automatic") or
UNSPEC
("unspecified") displays
BINLOG
statements automatically when necessary (that is, for format description events and row events)\&. If no
\fB\-\-base64\-output\fR
option is given, the effect is the same as
\fB\-\-base64\-output=AUTO\fR\&.
.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
Automatic
BINLOG
display is the only safe behavior if you intend to use the output of
\fBmysqlbinlog\fR
to re\-execute binary log file contents\&. The other option values are intended only for debugging or testing purposes because they may produce output that does not include all events in executable form\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
NEVER
causes
BINLOG
statements not to be displayed\&.
\fBmysqlbinlog\fR
exits with an error if a row event is found that must be displayed using
BINLOG\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
DECODE\-ROWS
specifies to
\fBmysqlbinlog\fR
that you intend for row events to be decoded and displayed as commented SQL statements by also specifying the
\fB\-\-verbose\fR
option\&. Like
NEVER,
DECODE\-ROWS
suppresses display of
BINLOG
statements, but unlike
NEVER, it does not exit with an error if a row event is found\&.
.RE
.sp
For examples that show the effect of
\fB\-\-base64\-output\fR
and
\fB\-\-verbose\fR
on row event output, see
the section called \(lqMYSQLBINLOG ROW EVENT DISPLAY\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-bind\-address=\fR\fB\fIip_address\fR\fR
On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-binlog\-row\-event\-max\-size=\fR\fB\fIN\fR\fR
.TS
allbox tab(:);
lB l
lB l
lB l
lB l
lB l.
T{
Command-Line Format
T}:T{
--binlog-row-event-max-size=#
T}
T{
Type
T}:T{
Numeric
T}
T{
Default Value
T}:T{
4294967040
T}
T{
Minimum Value
T}:T{
256
T}
T{
Maximum Value
T}:T{
18446744073709547520
T}
.TE
.sp 1
Specify the maximum size of a row\-based binary log event, in bytes\&. Rows are grouped into events smaller than this size if possible\&. The value should be a multiple of 256\&. The default is 4GB\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-character\-sets\-dir=\fR\fB\fIdir_name\fR\fR
The directory where character sets are installed\&. See
Section\ \&10.15, \(lqCharacter Set Configuration\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connection\-server\-id=\fR\fB\fIserver_id\fR\fR
This option is used to test a MySQL server for support of the
BINLOG_DUMP_NON_BLOCK
connection flag\&. It is not required for normal operations\&.
.sp
The effective default and minimum values for this option depend on whether
\fBmysqlbinlog\fR
is run in blocking mode or non\-blocking mode\&. When
\fBmysqlbinlog\fR
is run in blocking mode, the default (and minimum) value is 1; when run in non\-blocking mode, the default (and minimum) value is 0\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-database=\fR\fB\fIdb_name\fR\fR,
\fB\-d \fR\fB\fIdb_name\fR\fR
This option causes
\fBmysqlbinlog\fR
to output entries from the binary log (local log only) that occur while
\fIdb_name\fR
is been selected as the default database by
USE\&.
.sp
The
\fB\-\-database\fR
option for
\fBmysqlbinlog\fR
is similar to the
\fB\-\-binlog\-do\-db\fR
option for
\fBmysqld\fR, but can be used to specify only one database\&. If
\fB\-\-database\fR
is given multiple times, only the last instance is used\&.
.sp
The effects of this option depend on whether the statement\-based or row\-based logging format is in use, in the same way that the effects of
\fB\-\-binlog\-do\-db\fR
depend on whether statement\-based or row\-based logging is in use\&.
.PP
\fBStatement-based logging\fR. The
\fB\-\-database\fR
option works as follows:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
While
\fIdb_name\fR
is the default database, statements are output whether they modify tables in
\fIdb_name\fR
or a different database\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Unless
\fIdb_name\fR
is selected as the default database, statements are not output, even if they modify tables in
\fIdb_name\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
There is an exception for
CREATE DATABASE,
ALTER DATABASE, and
DROP DATABASE\&. The database being
\fIcreated, altered, or dropped\fR
is considered to be the default database when determining whether to output the statement\&.
.RE
.sp
Suppose that the binary log was created by executing these statements using statement\-based\-logging:
.sp
.if n \{\
.RS 4
.\}
.nf
INSERT INTO test\&.t1 (i) VALUES(100);
INSERT INTO db2\&.t2 (j) VALUES(200);
USE test;
INSERT INTO test\&.t1 (i) VALUES(101);
INSERT INTO t1 (i) VALUES(102);
INSERT INTO db2\&.t2 (j) VALUES(201);
USE db2;
INSERT INTO test\&.t1 (i) VALUES(103);
INSERT INTO db2\&.t2 (j) VALUES(202);
INSERT INTO t2 (j) VALUES(203);
.fi
.if n \{\
.RE
.\}
.sp
\fBmysqlbinlog \-\-database=test\fR
does not output the first two
INSERT
statements because there is no default database\&. It outputs the three
INSERT
statements following
USE test, but not the three
INSERT
statements following
USE db2\&.
.sp
\fBmysqlbinlog \-\-database=db2\fR
does not output the first two
INSERT
statements because there is no default database\&. It does not output the three
INSERT
statements following
USE test, but does output the three
INSERT
statements following
USE db2\&.
.PP
\fBRow-based logging\fR. \fBmysqlbinlog\fR
outputs only entries that change tables belonging to
\fIdb_name\fR\&. The default database has no effect on this\&. Suppose that the binary log just described was created using row\-based logging rather than statement\-based logging\&.
\fBmysqlbinlog \-\-database=test\fR
outputs only those entries that modify
t1
in the test database, regardless of whether
USE
was issued or what the default database is\&.
If a server is running with
binlog_format
set to
MIXED
and you want it to be possible to use
\fBmysqlbinlog\fR
with the
\fB\-\-database\fR
option, you must ensure that tables that are modified are in the database selected by
USE\&. (In particular, no cross\-database updates should be used\&.)
.sp
When used together with the
\fB\-\-rewrite\-db\fR
option, the
\fB\-\-rewrite\-db\fR
option is applied first; then the
\fB\-\-database\fR
option is applied, using the rewritten database name\&. The order in which the options are provided makes no difference in this regard\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-debug[=\fR\fB\fIdebug_options\fR\fR\fB]\fR,
\fB\-# [\fR\fB\fIdebug_options\fR\fR\fB]\fR
Write a debugging log\&. A typical
\fIdebug_options\fR
string is
d:t:o,\fIfile_name\fR\&. The default is
d:t:o,/tmp/mysqlbinlog\&.trace\&.
.sp
This option is available only if MySQL was built using
\fBWITH_DEBUG\fR\&. MySQL release binaries provided by Oracle are
\fInot\fR
built using this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-debug\-check\fR
Print some debugging information when the program exits\&.
.sp
This option is available only if MySQL was built using
\fBWITH_DEBUG\fR\&. MySQL release binaries provided by Oracle are
\fInot\fR
built using this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-debug\-info\fR
Print debugging information and memory and CPU usage statistics when the program exits\&.
.sp
This option is available only if MySQL was built using
\fBWITH_DEBUG\fR\&. MySQL release binaries provided by Oracle are
\fInot\fR
built using this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-default\-auth=\fR\fB\fIplugin\fR\fR
A hint about which client\-side authentication plugin to use\&. See
Section\ \&6.2.13, \(lqPluggable Authentication\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-extra\-file=\fR\fB\fIfile_name\fR\fR
Read this option file after the global option file but (on Unix) before the user option file\&. If the file does not exist or is otherwise inaccessible, an error occurs\&. If
\fIfile_name\fR
is not an absolute path name, it is interpreted relative to the current directory\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-file=\fR\fB\fIfile_name\fR\fR
Use only the given option file\&. If the file does not exist or is otherwise inaccessible, an error occurs\&. If
\fIfile_name\fR
is not an absolute path name, it is interpreted relative to the current directory\&.
.sp
Exception: Even with
\fB\-\-defaults\-file\fR, client programs read
\&.mylogin\&.cnf\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-defaults\-group\-suffix=\fR\fB\fIstr\fR\fR
Read not only the usual option groups, but also groups with the usual names and a suffix of
\fIstr\fR\&. For example,
\fBmysqlbinlog\fR
normally reads the
[client]
and
[mysqlbinlog]
groups\&. If this option is given as
\fB\-\-defaults\-group\-suffix=_other\fR,
\fBmysqlbinlog\fR
also reads the
[client_other]
and
[mysqlbinlog_other]
groups\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-disable\-log\-bin\fR,
\fB\-D\fR
Disable binary logging\&. This is useful for avoiding an endless loop if you use the
\fB\-\-to\-last\-log\fR
option and are sending the output to the same MySQL server\&. This option also is useful when restoring after an unexpected exit to avoid duplication of the statements you have logged\&.
.sp
This option causes
\fBmysqlbinlog\fR
to include a
SET sql_log_bin = 0
statement in its output to disable binary logging of the remaining output\&. Manipulating the session value of the
sql_log_bin
system variable is a restricted operation, so this option requires that you have privileges sufficient to set restricted session variables\&. See
Section\ \&5.1.8.1, \(lqSystem Variable Privileges\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-exclude\-gtids=\fR\fB\fIgtid_set\fR\fR
Do not display any of the groups listed in the
\fIgtid_set\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-force\-if\-open\fR,
\fB\-F\fR
Read binary log files even if they are open or were not closed properly\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-force\-read\fR,
\fB\-f\fR
With this option, if
\fBmysqlbinlog\fR
reads a binary log event that it does not recognize, it prints a warning, ignores the event, and continues\&. Without this option,
\fBmysqlbinlog\fR
stops if it reads such an event\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-get\-server\-public\-key\fR
Request from the server the public key required for RSA key pair\-based password exchange\&. This option applies to clients that authenticate with the
caching_sha2_password
authentication plugin\&. For that plugin, the server does not send the public key unless requested\&. This option is ignored for accounts that do not authenticate with that plugin\&. It is also ignored if RSA\-based password exchange is not used, as is the case when the client connects to the server using a secure connection\&.
.sp
If
\fB\-\-server\-public\-key\-path=\fR\fB\fIfile_name\fR\fR
is given and specifies a valid public key file, it takes precedence over
\fB\-\-get\-server\-public\-key\fR\&.
.sp
For information about the
caching_sha2_password
plugin, see
Section\ \&6.4.1.4, \(lqCaching SHA-2 Pluggable Authentication\(rq\&.
.sp
The
\fB\-\-get\-server\-public\-key\fR
option was added in MySQL 5\&.7\&.23\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-hexdump\fR,
\fB\-H\fR
Display a hex dump of the log in comments, as described in
the section called \(lqMYSQLBINLOG HEX DUMP FORMAT\(rq\&. The hex output can be helpful for replication debugging\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-host=\fR\fB\fIhost_name\fR\fR,
\fB\-h \fR\fB\fIhost_name\fR\fR
Get the binary log from the MySQL server on the given host\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-idempotent\fR
Tell the MySQL Server to use idempotent mode while processing updates; this causes suppression of any duplicate\-key or key\-not\-found errors that the server encounters in the current session while processing updates\&. This option may prove useful whenever it is desirable or necessary to replay one or more binary logs to a MySQL Server which may not contain all of the data to which the logs refer\&.
.sp
The scope of effect for this option includes the current
\fBmysqlbinlog\fR
client and session only\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-include\-gtids=\fR\fB\fIgtid_set\fR\fR
Display only the groups listed in the
\fIgtid_set\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-local\-load=\fR\fB\fIdir_name\fR\fR,
\fB\-l \fR\fB\fIdir_name\fR\fR
For data loading operations corresponding to
LOAD DATA
statements,
\fBmysqlbinlog\fR
extracts the files from the binary log events, writes them as temporary files to the local file system, and writes
LOAD DATA LOCAL
statements to cause the files to be loaded\&. By default,
\fBmysqlbinlog\fR
writes these temporary files to an operating system\-specific directory\&. The
\fB\-\-local\-load\fR
option can be used to explicitly specify the directory where
\fBmysqlbinlog\fR
should prepare local temporary files\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
These temporary files are not automatically removed by
\fBmysqlbinlog\fR
or any other MySQL program\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-login\-path=\fR\fB\fIname\fR\fR
Read options from the named login path in the
\&.mylogin\&.cnf
login path file\&. A
\(lqlogin path\(rq
is an option group containing options that specify which MySQL server to connect to and which account to authenticate as\&. To create or modify a login path file, use the
\fBmysql_config_editor\fR
utility\&. See
mysql_config_editor(1)\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-defaults\fR
Do not read any option files\&. If program startup fails due to reading unknown options from an option file,
\fB\-\-no\-defaults\fR
can be used to prevent them from being read\&.
.sp
The exception is that the
\&.mylogin\&.cnf
file is read in all cases, if it exists\&. This permits passwords to be specified in a safer way than on the command line even when
\fB\-\-no\-defaults\fR
is used\&. To create
\&.mylogin\&.cnf, use the
\fBmysql_config_editor\fR
utility\&. See
mysql_config_editor(1)\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-offset=\fR\fB\fIN\fR\fR,
\fB\-o \fR\fB\fIN\fR\fR
Skip the first
\fIN\fR
entries in the log\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-open\-files\-limit=\fR\fB\fIN\fR\fR
Specify the number of open file descriptors to reserve\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-password[=\fR\fB\fIpassword\fR\fR\fB]\fR,
\fB\-p[\fR\fB\fIpassword\fR\fR\fB]\fR
The password of the MySQL account used for connecting to the server\&. The password value is optional\&. If not given,
\fBmysqlbinlog\fR
prompts for one\&. If given, there must be
\fIno space\fR
between
\fB\-\-password=\fR
or
\fB\-p\fR
and the password following it\&. If no password option is specified, the default is to send no password\&.
.sp
Specifying a password on the command line should be considered insecure\&. To avoid giving the password on the command line, use an option file\&. See
Section\ \&6.1.2.1, \(lqEnd-User Guidelines for Password Security\(rq\&.
.sp
To explicitly specify that there is no password and that
\fBmysqlbinlog\fR
should not prompt for one, use the
\fB\-\-skip\-password\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-plugin\-dir=\fR\fB\fIdir_name\fR\fR
The directory in which to look for plugins\&. Specify this option if the
\fB\-\-default\-auth\fR
option is used to specify an authentication plugin but
\fBmysqlbinlog\fR
does not find it\&. See
Section\ \&6.2.13, \(lqPluggable Authentication\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-port=\fR\fB\fIport_num\fR\fR,
\fB\-P \fR\fB\fIport_num\fR\fR
The TCP/IP port number to use for connecting to a remote server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print\-defaults\fR
Print the program name and all options that it gets from option files\&.
.sp
For additional information about this and other option\-file options, see
Section\ \&4.2.2.3, \(lqCommand-Line Options that Affect Option-File Handling\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-protocol={TCP|SOCKET|PIPE|MEMORY}\fR
The transport protocol to use for connecting to the server\&. It is useful when the other connection parameters normally result in use of a protocol other than the one you want\&. For details on the permissible values, see
Section\ \&4.2.5, \(lqConnection Transport Protocols\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-raw\fR
By default,
\fBmysqlbinlog\fR
reads binary log files and writes events in text format\&. The
\fB\-\-raw\fR
option tells
\fBmysqlbinlog\fR
to write them in their original binary format\&. Its use requires that
\fB\-\-read\-from\-remote\-server\fR
also be used because the files are requested from a server\&.
\fBmysqlbinlog\fR
writes one output file for each file read from the server\&. The
\fB\-\-raw\fR
option can be used to make a backup of a server\*(Aqs binary log\&. With the
\fB\-\-stop\-never\fR
option, the backup is
\(lqlive\(rq
because
\fBmysqlbinlog\fR
stays connected to the server\&. By default, output files are written in the current directory with the same names as the original log files\&. Output file names can be modified using the
\fB\-\-result\-file\fR
option\&. For more information, see
the section called \(lqUSING MYSQLBINLOG TO BACK UP BINARY LOG FILES\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-read\-from\-remote\-master=\fR\fB\fItype\fR\fR
Read binary logs from a MySQL server with the
COM_BINLOG_DUMP
or
COM_BINLOG_DUMP_GTID
commands by setting the option value to either
BINLOG\-DUMP\-NON\-GTIDS
or
BINLOG\-DUMP\-GTIDS, respectively\&. If
\fB\-\-read\-from\-remote\-master=BINLOG\-DUMP\-GTIDS\fR
is combined with
\fB\-\-exclude\-gtids\fR, transactions can be filtered out on the source, avoiding unnecessary network traffic\&.
.sp
The connection parameter options are used with this option or the
\fB\-\-read\-from\-remote\-server\fR
option\&. These options are
\fB\-\-host\fR,
\fB\-\-password\fR,
\fB\-\-port\fR,
\fB\-\-protocol\fR,
\fB\-\-socket\fR, and
\fB\-\-user\fR\&. If neither of the remote options is specified, the connection parameter options are ignored\&.
.sp
The
REPLICATION SLAVE
privilege is required to use this option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-read\-from\-remote\-server\fR,
\fB\-R\fR
Read the binary log from a MySQL server rather than reading a local log file\&. This option requires that the remote server be running\&. It works only for binary log files on the remote server, not relay log files\&.
.sp
The connection parameter options are used with this option or the
\fB\-\-read\-from\-remote\-master\fR
option\&. These options are
\fB\-\-host\fR,
\fB\-\-password\fR,
\fB\-\-port\fR,
\fB\-\-protocol\fR,
\fB\-\-socket\fR, and
\fB\-\-user\fR\&. If neither of the remote options is specified, the connection parameter options are ignored\&.
.sp
The
REPLICATION SLAVE
privilege is required to use this option\&.
.sp
This option is like
\fB\-\-read\-from\-remote\-master=BINLOG\-DUMP\-NON\-GTIDS\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-result\-file=\fR\fB\fIname\fR\fR,
\fB\-r \fR\fB\fIname\fR\fR
Without the
\fB\-\-raw\fR
option, this option indicates the file to which
\fBmysqlbinlog\fR
writes text output\&. With
\fB\-\-raw\fR,
\fBmysqlbinlog\fR
writes one binary output file for each log file transferred from the server, writing them by default in the current directory using the same names as the original log file\&. In this case, the
\fB\-\-result\-file\fR
option value is treated as a prefix that modifies output file names\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-rewrite\-db=\*(Aq\fR\fB\fIfrom_name\fR\fR\fB\->\fR\fB\fIto_name\fR\fR\fB\*(Aq\fR
When reading from a row\-based or statement\-based log, rewrite all occurrences of
\fIfrom_name\fR
to
\fIto_name\fR\&. Rewriting is done on the rows, for row\-based logs, as well as on the
USE
clauses, for statement\-based logs\&. In MySQL versions prior to 5\&.7\&.8, this option was only for use when restoring tables logged using the row\-based format\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBWarning\fR
.ps -1
.br
Statements in which table names are qualified with database names are not rewritten to use the new name when using this option\&.
.sp .5v
.RE
The rewrite rule employed as a value for this option is a string having the form
\*(Aq\fIfrom_name\fR\->\fIto_name\fR\*(Aq, as shown previously, and for this reason must be enclosed by quotation marks\&.
.sp
To employ multiple rewrite rules, specify the option multiple times, as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-rewrite\-db=\*(Aqdbcurrent\->dbold\*(Aq \-\-rewrite\-db=\*(Aqdbtest\->dbcurrent\*(Aq \e
binlog\&.00001 > /tmp/statements\&.sql
.fi
.if n \{\
.RE
.\}
.sp
When used together with the
\fB\-\-database\fR
option, the
\fB\-\-rewrite\-db\fR
option is applied first; then
\fB\-\-database\fR
option is applied, using the rewritten database name\&. The order in which the options are provided makes no difference in this regard\&.
.sp
This means that, for example, if
\fBmysqlbinlog\fR
is started with
\fB\-\-rewrite\-db=\*(Aqmydb\->yourdb\*(Aq \-\-database=yourdb\fR, then all updates to any tables in databases
mydb
and
yourdb
are included in the output\&. On the other hand, if it is started with
\fB\-\-rewrite\-db=\*(Aqmydb\->yourdb\*(Aq \-\-database=mydb\fR, then
\fBmysqlbinlog\fR
outputs no statements at all: since all updates to
mydb
are first rewritten as updates to
yourdb
before applying the
\fB\-\-database\fR
option, there remain no updates that match
\fB\-\-database=mydb\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-secure\-auth\fR
Do not send passwords to the server in old (pre\-4\&.1) format\&. This prevents connections except for servers that use the newer password format\&.
.sp
As of MySQL 5\&.7\&.5, this option is deprecated; expect it to be removed in a future MySQL release\&. It is always enabled and attempting to disable it (\fB\-\-skip\-secure\-auth\fR,
\fB\-\-secure\-auth=0\fR) produces an error\&. Before MySQL 5\&.7\&.5, this option is enabled by default but can be disabled\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
Passwords that use the pre\-4\&.1 hashing method are less secure than passwords that use the native password hashing method and should be avoided\&. Pre\-4\&.1 passwords are deprecated and support for them was removed in MySQL 5\&.7\&.5\&. For account upgrade instructions, see
Section\ \&6.4.1.3, \(lqMigrating Away from Pre-4.1 Password Hashing and the mysql_old_password Plugin\(rq\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-server\-id=\fR\fB\fIid\fR\fR
Display only those events created by the server having the given server ID\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-server\-id\-bits=\fR\fB\fIN\fR\fR
Use only the first
\fIN\fR
bits of the
server_id
to identify the server\&. If the binary log was written by a
\fBmysqld\fR
with server\-id\-bits set to less than 32 and user data stored in the most significant bit, running
\fBmysqlbinlog\fR
with
\fB\-\-server\-id\-bits\fR
set to 32 enables this data to be seen\&.
.sp
This option is supported only by the versions of
\fBmysqlbinlog\fR
supplied with the NDB Cluster distribution, or built from the NDB Cluster sources\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-server\-public\-key\-path=\fR\fB\fIfile_name\fR\fR
The path name to a file in PEM format containing a client\-side copy of the public key required by the server for RSA key pair\-based password exchange\&. This option applies to clients that authenticate with the
sha256_password
or
caching_sha2_password
authentication plugin\&. This option is ignored for accounts that do not authenticate with one of those plugins\&. It is also ignored if RSA\-based password exchange is not used, as is the case when the client connects to the server using a secure connection\&.
.sp
If
\fB\-\-server\-public\-key\-path=\fR\fB\fIfile_name\fR\fR
is given and specifies a valid public key file, it takes precedence over
\fB\-\-get\-server\-public\-key\fR\&.
.sp
For
sha256_password, this option applies only if MySQL was built using OpenSSL\&.
.sp
For information about the
sha256_password
and
caching_sha2_password
plugins, see
Section\ \&6.4.1.5, \(lqSHA-256 Pluggable Authentication\(rq, and
Section\ \&6.4.1.4, \(lqCaching SHA-2 Pluggable Authentication\(rq\&.
.sp
The
\fB\-\-server\-public\-key\-path\fR
option was added in MySQL 5\&.7\&.23\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-set\-charset=\fR\fB\fIcharset_name\fR\fR
Add a
SET NAMES \fIcharset_name\fR
statement to the output to specify the character set to be used for processing log files\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-shared\-memory\-base\-name=\fR\fB\fIname\fR\fR
On Windows, the shared\-memory name to use for connections made using shared memory to a local server\&. The default value is
MYSQL\&. The shared\-memory name is case\-sensitive\&.
.sp
This option applies only if the server was started with the
shared_memory
system variable enabled to support shared\-memory connections\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-short\-form\fR,
\fB\-s\fR
Display only the statements contained in the log, without any extra information or row\-based events\&. This is for testing only, and should not be used in production systems\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-skip\-gtids[=(true|false)]\fR
Do not display any GTIDs in the output\&. This is needed when writing to a dump file from one or more binary logs containing GTIDs, as shown in this example:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-skip\-gtids binlog\&.000001 > /tmp/dump\&.sql
mysqlbinlog \-\-skip\-gtids binlog\&.000002 >> /tmp/dump\&.sql
mysql \-u root \-p \-e "source /tmp/dump\&.sql"
.fi
.if n \{\
.RE
.\}
.sp
The use of this option is otherwise not normally recommended in production\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-socket=\fR\fB\fIpath\fR\fR,
\fB\-S \fR\fB\fIpath\fR\fR
For connections to
localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use\&.
.sp
On Windows, this option applies only if the server was started with the
named_pipe
system variable enabled to support named\-pipe connections\&. In addition, the user making the connection must be a member of the Windows group specified by the
named_pipe_full_access_group
system variable\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ssl*\fR
Options that begin with
\fB\-\-ssl\fR
specify whether to connect to the server using encryption and indicate where to find SSL keys and certificates\&. See
the section called \(lqCommand Options for Encrypted Connections\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-start\-datetime=\fR\fB\fIdatetime\fR\fR
Start reading the binary log at the first event having a timestamp equal to or later than the
\fIdatetime\fR
argument\&. The
\fIdatetime\fR
value is relative to the local time zone on the machine where you run
\fBmysqlbinlog\fR\&. The value should be in a format accepted for the
DATETIME
or
TIMESTAMP
data types\&. For example:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-start\-datetime="2005\-12\-25 11:25:56" binlog\&.000003
.fi
.if n \{\
.RE
.\}
.sp
This option is useful for point\-in\-time recovery\&. See
Section\ \&7.5, \(lqPoint-in-Time (Incremental) Recovery\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-start\-position=\fR\fB\fIN\fR\fR,
\fB\-j \fR\fB\fIN\fR\fR
Start reading the binary log at the first event having a position equal to or greater than
\fIN\fR\&. This option applies to the first log file named on the command line\&.
.sp
This option is useful for point\-in\-time recovery\&. See
Section\ \&7.5, \(lqPoint-in-Time (Incremental) Recovery\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-stop\-datetime=\fR\fB\fIdatetime\fR\fR
Stop reading the binary log at the first event having a timestamp equal to or later than the
\fIdatetime\fR
argument\&. See the description of the
\fB\-\-start\-datetime\fR
option for information about the
\fIdatetime\fR
value\&.
.sp
This option is useful for point\-in\-time recovery\&. See
Section\ \&7.5, \(lqPoint-in-Time (Incremental) Recovery\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-stop\-never\fR
This option is used with
\fB\-\-read\-from\-remote\-server\fR\&. It tells
\fBmysqlbinlog\fR
to remain connected to the server\&. Otherwise
\fBmysqlbinlog\fR
exits when the last log file has been transferred from the server\&.
\fB\-\-stop\-never\fR
implies
\fB\-\-to\-last\-log\fR, so only the first log file to transfer need be named on the command line\&.
.sp
\fB\-\-stop\-never\fR
is commonly used with
\fB\-\-raw\fR
to make a live binary log backup, but also can be used without
\fB\-\-raw\fR
to maintain a continuous text display of log events as the server generates them\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-stop\-never\-slave\-server\-id=\fR\fB\fIid\fR\fR
With
\fB\-\-stop\-never\fR,
\fBmysqlbinlog\fR
reports a server ID of 65535 when it connects to the server\&.
\fB\-\-stop\-never\-slave\-server\-id\fR
explicitly specifies the server ID to report\&. It can be used to avoid a conflict with the ID of a replica server or another
\fBmysqlbinlog\fR
process\&. See
the section called \(lqSPECIFYING THE MYSQLBINLOG SERVER ID\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-stop\-position=\fR\fB\fIN\fR\fR
Stop reading the binary log at the first event having a position equal to or greater than
\fIN\fR\&. This option applies to the last log file named on the command line\&.
.sp
This option is useful for point\-in\-time recovery\&. See
Section\ \&7.5, \(lqPoint-in-Time (Incremental) Recovery\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-tls\-version=\fR\fB\fIprotocol_list\fR\fR
The permissible TLS protocols for encrypted connections\&. The value is a list of one or more comma\-separated protocol names\&. The protocols that can be named for this option depend on the SSL library used to compile MySQL\&. For details, see
Section\ \&6.3.2, \(lqEncrypted Connection TLS Protocols and Ciphers\(rq\&.
.sp
This option was added in MySQL 5\&.7\&.10\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-to\-last\-log\fR,
\fB\-t\fR
Do not stop at the end of the requested binary log from a MySQL server, but rather continue printing until the end of the last binary log\&. If you send the output to the same MySQL server, this may lead to an endless loop\&. This option requires
\fB\-\-read\-from\-remote\-server\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-user=\fR\fB\fIuser_name\fR\fR,
\fB\-u \fR\fB\fIuser_name\fR\fR
The user name of the MySQL account to use when connecting to a remote server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-verbose\fR,
\fB\-v\fR
Reconstruct row events and display them as commented SQL statements\&. If this option is given twice (by passing in either "\-vv" or "\-\-verbose \-\-verbose"), the output includes comments to indicate column data types and some metadata, and row query log events if so configured\&.
.sp
For examples that show the effect of
\fB\-\-base64\-output\fR
and
\fB\-\-verbose\fR
on row event output, see
the section called \(lqMYSQLBINLOG ROW EVENT DISPLAY\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-verify\-binlog\-checksum\fR,
\fB\-c\fR
Verify checksums in binary log files\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-version\fR,
\fB\-V\fR
Display version information and exit\&.
.sp
In MySQL 5\&.7, the
\fBmysqlbinlog\fR
version number is 3\&.4\&.
.RE
.PP
You can pipe the output of
\fBmysqlbinlog\fR
into the
\fBmysql\fR
client to execute the events contained in the binary log\&. This technique is used to recover from an unexpected exit when you have an old backup (see
Section\ \&7.5, \(lqPoint-in-Time (Incremental) Recovery\(rq)\&. For example:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.000001 | mysql \-u root \-p
.fi
.if n \{\
.RE
.\}
.PP
Or:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.[0\-9]* | mysql \-u root \-p
.fi
.if n \{\
.RE
.\}
.PP
If the statements produced by
\fBmysqlbinlog\fR
may contain
BLOB
values, these may cause problems when
\fBmysql\fR
processes them\&. In this case, invoke
\fBmysql\fR
with the
\fB\-\-binary\-mode\fR
option\&.
.PP
You can also redirect the output of
\fBmysqlbinlog\fR
to a text file instead, if you need to modify the statement log first (for example, to remove statements that you do not want to execute for some reason)\&. After editing the file, execute the statements that it contains by using it as input to the
\fBmysql\fR
program:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.000001 > tmpfile
\&.\&.\&. \fIedit tmpfile\fR \&.\&.\&.
mysql \-u root \-p < tmpfile
.fi
.if n \{\
.RE
.\}
.PP
When
\fBmysqlbinlog\fR
is invoked with the
\fB\-\-start\-position\fR
option, it displays only those events with an offset in the binary log greater than or equal to a given position (the given position must match the start of one event)\&. It also has options to stop and start when it sees an event with a given date and time\&. This enables you to perform point\-in\-time recovery using the
\fB\-\-stop\-datetime\fR
option (to be able to say, for example,
\(lqroll forward my databases to how they were today at 10:30 a\&.m\&.\(rq)\&.
.PP
If you have more than one binary log to execute on the MySQL server, the safe method is to process them all using a single connection to the server\&. Here is an example that demonstrates what may be
\fIunsafe\fR:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.000001 | mysql \-u root \-p # DANGER!!
mysqlbinlog binlog\&.000002 | mysql \-u root \-p # DANGER!!
.fi
.if n \{\
.RE
.\}
.PP
Processing binary logs this way using multiple connections to the server causes problems if the first log file contains a
CREATE TEMPORARY TABLE
statement and the second log contains a statement that uses the temporary table\&. When the first
\fBmysql\fR
process terminates, the server drops the temporary table\&. When the second
\fBmysql\fR
process attempts to use the table, the server reports
\(lqunknown table\&.\(rq
.PP
To avoid problems like this, use a
\fIsingle\fR
\fBmysql\fR
process to execute the contents of all binary logs that you want to process\&. Here is one way to do so:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.000001 binlog\&.000002 | mysql \-u root \-p
.fi
.if n \{\
.RE
.\}
.PP
Another approach is to write all the logs to a single file and then process the file:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog binlog\&.000001 > /tmp/statements\&.sql
mysqlbinlog binlog\&.000002 >> /tmp/statements\&.sql
mysql \-u root \-p \-e "source /tmp/statements\&.sql"
.fi
.if n \{\
.RE
.\}
.PP
\fBmysqlbinlog\fR
can produce output that reproduces a
LOAD DATA
operation without the original data file\&.
\fBmysqlbinlog\fR
copies the data to a temporary file and writes a
LOAD DATA LOCAL
statement that refers to the file\&. The default location of the directory where these files are written is system\-specific\&. To specify a directory explicitly, use the
\fB\-\-local\-load\fR
option\&.
.PP
Because
\fBmysqlbinlog\fR
converts
LOAD DATA
statements to
LOAD DATA LOCAL
statements (that is, it adds
LOCAL), both the client and the server that you use to process the statements must be configured with the
LOCAL
capability enabled\&. See
Section\ \&6.1.6, \(lqSecurity Considerations for LOAD DATA LOCAL\(rq\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBWarning\fR
.ps -1
.br
.PP
The temporary files created for
LOAD DATA LOCAL
statements are
\fInot\fR
automatically deleted because they are needed until you actually execute those statements\&. You should delete the temporary files yourself after you no longer need the statement log\&. The files can be found in the temporary file directory and have names like
\fIoriginal_file_name\-#\-#\fR\&.
.sp .5v
.RE
.SH "MYSQLBINLOG HEX DUMP FORMAT"
.PP
The
\fB\-\-hexdump\fR
option causes
\fBmysqlbinlog\fR
to produce a hex dump of the binary log contents:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-hexdump master\-bin\&.000001
.fi
.if n \{\
.RE
.\}
.PP
The hex output consists of comment lines beginning with
#, so the output might look like this for the preceding command:
.sp
.if n \{\
.RS 4
.\}
.nf
/*!40019 SET @@SESSION\&.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
# at 4
#051024 17:24:13 server id 1 end_log_pos 98
# Position Timestamp Type Master ID Size Master Pos Flags
# 00000004 9d fc 5c 43 0f 01 00 00 00 5e 00 00 00 62 00 00 00 00 00
# 00000017 04 00 35 2e 30 2e 31 35 2d 64 65 62 75 67 2d 6c |\&.\&.5\&.0\&.15\&.debug\&.l|
# 00000027 6f 67 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |og\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.|
# 00000037 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.|
# 00000047 00 00 00 00 9d fc 5c 43 13 38 0d 00 08 00 12 00 |\&.\&.\&.\&.\&.\&.\&.C\&.8\&.\&.\&.\&.\&.\&.|
# 00000057 04 04 04 04 12 00 00 4b 00 04 1a |\&.\&.\&.\&.\&.\&.\&.K\&.\&.\&.|
# Start: binlog v 4, server v 5\&.0\&.15\-debug\-log created 051024 17:24:13
# at startup
ROLLBACK;
.fi
.if n \{\
.RE
.\}
.PP
Hex dump output currently contains the elements in the following list\&. This format is subject to change\&. For more information about binary log format, see
\m[blue]\fBMySQL Internals: The Binary Log\fR\m[]\&\s-2\u[1]\d\s+2\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Position: The byte position within the log file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Timestamp: The event timestamp\&. In the example shown,
\*(Aq9d fc 5c 43\*(Aq
is the representation of
\*(Aq051024 17:24:13\*(Aq
in hexadecimal\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Type: The event type code\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Master ID: The server ID of the source that created the event\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Size: The size in bytes of the event\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Master Pos: The position of the next event in the original source log file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Flags: Event flag values\&.
.RE
.SH "MYSQLBINLOG ROW EVENT DISPLAY"
.PP
The following examples illustrate how
\fBmysqlbinlog\fR
displays row events that specify data modifications\&. These correspond to events with the
WRITE_ROWS_EVENT,
UPDATE_ROWS_EVENT, and
DELETE_ROWS_EVENT
type codes\&. The
\fB\-\-base64\-output=DECODE\-ROWS\fR
and
\fB\-\-verbose\fR
options may be used to affect row event output\&.
.PP
Suppose that the server is using row\-based binary logging and that you execute the following sequence of statements:
.sp
.if n \{\
.RS 4
.\}
.nf
CREATE TABLE t
(
id INT NOT NULL,
name VARCHAR(20) NOT NULL,
date DATE NULL
) ENGINE = InnoDB;
START TRANSACTION;
INSERT INTO t VALUES(1, \*(Aqapple\*(Aq, NULL);
UPDATE t SET name = \*(Aqpear\*(Aq, date = \*(Aq2009\-01\-01\*(Aq WHERE id = 1;
DELETE FROM t WHERE id = 1;
COMMIT;
.fi
.if n \{\
.RE
.\}
.PP
By default,
\fBmysqlbinlog\fR
displays row events encoded as base\-64 strings using
BINLOG
statements\&. Omitting extraneous lines, the output for the row events produced by the preceding statement sequence looks like this:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBmysqlbinlog \fR\fB\fIlog_file\fR\fR
\&.\&.\&.
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAANoAAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBcBAAAAKAAAAAIBAAAQABEAAAAAAAEAA//8AQAAAAVhcHBsZQ==
\*(Aq/*!*/;
\&.\&.\&.
# at 302
#080828 15:03:08 server id 1 end_log_pos 356 Update_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAAC4BAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBgBAAAANgAAAGQBAAAQABEAAAAAAAEAA////AEAAAAFYXBwbGX4AQAAAARwZWFyIbIP
\*(Aq/*!*/;
\&.\&.\&.
# at 400
#080828 15:03:08 server id 1 end_log_pos 442 Delete_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAAJABAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBkBAAAAKgAAALoBAAAQABEAAAAAAAEAA//4AQAAAARwZWFyIbIP
\*(Aq/*!*/;
.fi
.if n \{\
.RE
.\}
.PP
To see the row events as comments in the form of
\(lqpseudo\-SQL\(rq
statements, run
\fBmysqlbinlog\fR
with the
\fB\-\-verbose\fR
or
\fB\-v\fR
option\&. The output contains lines beginning with
###:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBmysqlbinlog \-v \fR\fB\fIlog_file\fR\fR
\&.\&.\&.
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAANoAAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBcBAAAAKAAAAAIBAAAQABEAAAAAAAEAA//8AQAAAAVhcHBsZQ==
\*(Aq/*!*/;
### INSERT INTO test\&.t
### SET
### @1=1
### @2=\*(Aqapple\*(Aq
### @3=NULL
\&.\&.\&.
# at 302
#080828 15:03:08 server id 1 end_log_pos 356 Update_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAAC4BAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBgBAAAANgAAAGQBAAAQABEAAAAAAAEAA////AEAAAAFYXBwbGX4AQAAAARwZWFyIbIP
\*(Aq/*!*/;
### UPDATE test\&.t
### WHERE
### @1=1
### @2=\*(Aqapple\*(Aq
### @3=NULL
### SET
### @1=1
### @2=\*(Aqpear\*(Aq
### @3=\*(Aq2009:01:01\*(Aq
\&.\&.\&.
# at 400
#080828 15:03:08 server id 1 end_log_pos 442 Delete_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAAJABAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBkBAAAAKgAAALoBAAAQABEAAAAAAAEAA//4AQAAAARwZWFyIbIP
\*(Aq/*!*/;
### DELETE FROM test\&.t
### WHERE
### @1=1
### @2=\*(Aqpear\*(Aq
### @3=\*(Aq2009:01:01\*(Aq
.fi
.if n \{\
.RE
.\}
.PP
Specify
\fB\-\-verbose\fR
or
\fB\-v\fR
twice to also display data types and some metadata for each column\&. The output contains an additional comment following each column change:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBmysqlbinlog \-vv \fR\fB\fIlog_file\fR\fR
\&.\&.\&.
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAANoAAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBcBAAAAKAAAAAIBAAAQABEAAAAAAAEAA//8AQAAAAVhcHBsZQ==
\*(Aq/*!*/;
### INSERT INTO test\&.t
### SET
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=\*(Aqapple\*(Aq /* VARSTRING(20) meta=20 nullable=0 is_null=0 */
### @3=NULL /* VARSTRING(20) meta=0 nullable=1 is_null=1 */
\&.\&.\&.
# at 302
#080828 15:03:08 server id 1 end_log_pos 356 Update_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAAC4BAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBgBAAAANgAAAGQBAAAQABEAAAAAAAEAA////AEAAAAFYXBwbGX4AQAAAARwZWFyIbIP
\*(Aq/*!*/;
### UPDATE test\&.t
### WHERE
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=\*(Aqapple\*(Aq /* VARSTRING(20) meta=20 nullable=0 is_null=0 */
### @3=NULL /* VARSTRING(20) meta=0 nullable=1 is_null=1 */
### SET
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=\*(Aqpear\*(Aq /* VARSTRING(20) meta=20 nullable=0 is_null=0 */
### @3=\*(Aq2009:01:01\*(Aq /* DATE meta=0 nullable=1 is_null=0 */
\&.\&.\&.
# at 400
#080828 15:03:08 server id 1 end_log_pos 442 Delete_rows: table id 17 flags: STMT_END_F
BINLOG \*(Aq
fAS3SBMBAAAALAAAAJABAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBkBAAAAKgAAALoBAAAQABEAAAAAAAEAA//4AQAAAARwZWFyIbIP
\*(Aq/*!*/;
### DELETE FROM test\&.t
### WHERE
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=\*(Aqpear\*(Aq /* VARSTRING(20) meta=20 nullable=0 is_null=0 */
### @3=\*(Aq2009:01:01\*(Aq /* DATE meta=0 nullable=1 is_null=0 */
.fi
.if n \{\
.RE
.\}
.PP
You can tell
\fBmysqlbinlog\fR
to suppress the
BINLOG
statements for row events by using the
\fB\-\-base64\-output=DECODE\-ROWS\fR
option\&. This is similar to
\fB\-\-base64\-output=NEVER\fR
but does not exit with an error if a row event is found\&. The combination of
\fB\-\-base64\-output=DECODE\-ROWS\fR
and
\fB\-\-verbose\fR
provides a convenient way to see row events only as SQL statements:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBmysqlbinlog \-v \-\-base64\-output=DECODE\-ROWS \fR\fB\fIlog_file\fR\fR
\&.\&.\&.
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
### INSERT INTO test\&.t
### SET
### @1=1
### @2=\*(Aqapple\*(Aq
### @3=NULL
\&.\&.\&.
# at 302
#080828 15:03:08 server id 1 end_log_pos 356 Update_rows: table id 17 flags: STMT_END_F
### UPDATE test\&.t
### WHERE
### @1=1
### @2=\*(Aqapple\*(Aq
### @3=NULL
### SET
### @1=1
### @2=\*(Aqpear\*(Aq
### @3=\*(Aq2009:01:01\*(Aq
\&.\&.\&.
# at 400
#080828 15:03:08 server id 1 end_log_pos 442 Delete_rows: table id 17 flags: STMT_END_F
### DELETE FROM test\&.t
### WHERE
### @1=1
### @2=\*(Aqpear\*(Aq
### @3=\*(Aq2009:01:01\*(Aq
.fi
.if n \{\
.RE
.\}
.sp
.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
.PP
You should not suppress
BINLOG
statements if you intend to re\-execute
\fBmysqlbinlog\fR
output\&.
.sp .5v
.RE
.PP
The SQL statements produced by
\fB\-\-verbose\fR
for row events are much more readable than the corresponding
BINLOG
statements\&. However, they do not correspond exactly to the original SQL statements that generated the events\&. The following limitations apply:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The original column names are lost and replaced by
@\fIN\fR, where
\fIN\fR
is a column number\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Character set information is not available in the binary log, which affects string column display:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
There is no distinction made between corresponding binary and nonbinary string types (BINARY
and
CHAR,
VARBINARY
and
VARCHAR,
BLOB
and
TEXT)\&. The output uses a data type of
STRING
for fixed\-length strings and
VARSTRING
for variable\-length strings\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
For multibyte character sets, the maximum number of bytes per character is not present in the binary log, so the length for string types is displayed in bytes rather than in characters\&. For example,
STRING(4)
is used as the data type for values from either of these column types:
.sp
.if n \{\
.RS 4
.\}
.nf
CHAR(4) CHARACTER SET latin1
CHAR(2) CHARACTER SET ucs2
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Due to the storage format for events of type
UPDATE_ROWS_EVENT,
UPDATE
statements are displayed with the
WHERE
clause preceding the
SET
clause\&.
.RE
.RE
.PP
Proper interpretation of row events requires the information from the format description event at the beginning of the binary log\&. Because
\fBmysqlbinlog\fR
does not know in advance whether the rest of the log contains row events, by default it displays the format description event using a
BINLOG
statement in the initial part of the output\&.
.PP
If the binary log is known not to contain any events requiring a
BINLOG
statement (that is, no row events), the
\fB\-\-base64\-output=NEVER\fR
option can be used to prevent this header from being written\&.
.SH "USING MYSQLBINLOG TO BACK UP BINARY LOG FILES"
.PP
By default,
\fBmysqlbinlog\fR
reads binary log files and displays their contents in text format\&. This enables you to examine events within the files more easily and to re\-execute them (for example, by using the output as input to
\fBmysql\fR)\&.
\fBmysqlbinlog\fR
can read log files directly from the local file system, or, with the
\fB\-\-read\-from\-remote\-server\fR
option, it can connect to a server and request binary log contents from that server\&.
\fBmysqlbinlog\fR
writes text output to its standard output, or to the file named as the value of the
\fB\-\-result\-file=\fR\fB\fIfile_name\fR\fR
option if that option is given\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
mysqlbinlog Backup Capabilities
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
mysqlbinlog Backup Options
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Static and Live Backups
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Output File Naming
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Example: mysqldump + mysqlbinlog for Backup and Restore
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
mysqlbinlog Backup Restrictions
.RE
mysqlbinlog Backup Capabilities
.PP
\fBmysqlbinlog\fR
can read binary log files and write new files containing the same content\(emthat is, in binary format rather than text format\&. This capability enables you to easily back up a binary log in its original format\&.
\fBmysqlbinlog\fR
can make a static backup, backing up a set of log files and stopping when the end of the last file is reached\&. It can also make a continuous (\(lqlive\(rq) backup, staying connected to the server when it reaches the end of the last log file and continuing to copy new events as they are generated\&. In continuous\-backup operation,
\fBmysqlbinlog\fR
runs until the connection ends (for example, when the server exits) or
\fBmysqlbinlog\fR
is forcibly terminated\&. When the connection ends,
\fBmysqlbinlog\fR
does not wait and retry the connection, unlike a replica server\&. To continue a live backup after the server has been restarted, you must also restart
\fBmysqlbinlog\fR\&.
mysqlbinlog Backup Options
.PP
Binary log backup requires that you invoke
\fBmysqlbinlog\fR
with two options at minimum:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The
\fB\-\-read\-from\-remote\-server\fR
(or
\fB\-R\fR) option tells
\fBmysqlbinlog\fR
to connect to a server and request its binary log\&. (This is similar to a replica replication server connecting to its source server\&.)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The
\fB\-\-raw\fR
option tells
\fBmysqlbinlog\fR
to write raw (binary) output, not text output\&.
.RE
.PP
Along with
\fB\-\-read\-from\-remote\-server\fR, it is common to specify other options:
\fB\-\-host\fR
indicates where the server is running, and you may also need to specify connection options such as
\fB\-\-user\fR
and
\fB\-\-password\fR\&.
.PP
Several other options are useful in conjunction with
\fB\-\-raw\fR:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-stop\-never\fR: Stay connected to the server after reaching the end of the last log file and continue to read new events\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-stop\-never\-slave\-server\-id=\fR\fB\fIid\fR\fR: The server ID that
\fBmysqlbinlog\fR
reports to the server when
\fB\-\-stop\-never\fR
is used\&. The default is 65535\&. This can be used to avoid a conflict with the ID of a replica server or another
\fBmysqlbinlog\fR
process\&. See
the section called \(lqSPECIFYING THE MYSQLBINLOG SERVER ID\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-result\-file\fR: A prefix for output file names, as described later\&.
.RE
Static and Live Backups
.PP
To back up a server\*(Aqs binary log files with
\fBmysqlbinlog\fR, you must specify file names that actually exist on the server\&. If you do not know the names, connect to the server and use the
SHOW BINARY LOGS
statement to see the current names\&. Suppose that the statement produces this output:
.sp
.if n \{\
.RS 4
.\}
.nf
mysql> \fBSHOW BINARY LOGS;\fR
+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-+
| Log_name | File_size |
+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-+
| binlog\&.000130 | 27459 |
| binlog\&.000131 | 13719 |
| binlog\&.000132 | 43268 |
+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-\-\-+
.fi
.if n \{\
.RE
.\}
.PP
With that information, you can use
\fBmysqlbinlog\fR
to back up the binary log to the current directory as follows (enter each command on a single line):
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
To make a static backup of
binlog\&.000130
through
binlog\&.000132, use either of these commands:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-read\-from\-remote\-server \-\-host=\fIhost_name\fR \-\-raw
binlog\&.000130 binlog\&.000131 binlog\&.000132
mysqlbinlog \-\-read\-from\-remote\-server \-\-host=\fIhost_name\fR \-\-raw
\-\-to\-last\-log binlog\&.000130
.fi
.if n \{\
.RE
.\}
.sp
The first command specifies every file name explicitly\&. The second names only the first file and uses
\fB\-\-to\-last\-log\fR
to read through the last\&. A difference between these commands is that if the server happens to open
binlog\&.000133
before
\fBmysqlbinlog\fR
reaches the end of
binlog\&.000132, the first command does not read it, but the second command does\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
To make a live backup in which
\fBmysqlbinlog\fR
starts with
binlog\&.000130
to copy existing log files, then stays connected to copy new events as the server generates them:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-read\-from\-remote\-server \-\-host=\fIhost_name\fR \-\-raw
\-\-stop\-never binlog\&.000130
.fi
.if n \{\
.RE
.\}
.sp
With
\fB\-\-stop\-never\fR, it is not necessary to specify
\fB\-\-to\-last\-log\fR
to read to the last log file because that option is implied\&.
.RE
Output File Naming
.PP
Without
\fB\-\-raw\fR,
\fBmysqlbinlog\fR
produces text output and the
\fB\-\-result\-file\fR
option, if given, specifies the name of the single file to which all output is written\&. With
\fB\-\-raw\fR,
\fBmysqlbinlog\fR
writes one binary output file for each log file transferred from the server\&. By default,
\fBmysqlbinlog\fR
writes the files in the current directory with the same names as the original log files\&. To modify the output file names, use the
\fB\-\-result\-file\fR
option\&. In conjunction with
\fB\-\-raw\fR, the
\fB\-\-result\-file\fR
option value is treated as a prefix that modifies the output file names\&.
.PP
Suppose that a server currently has binary log files named
binlog\&.000999
and up\&. If you use
\fBmysqlbinlog \-\-raw\fR
to back up the files, the
\fB\-\-result\-file\fR
option produces output file names as shown in the following table\&. You can write the files to a specific directory by beginning the
\fB\-\-result\-file\fR
value with the directory path\&. If the
\fB\-\-result\-file\fR
value consists only of a directory name, the value must end with the pathname separator character\&. Output files are overwritten if they exist\&.
.TS
allbox tab(:);
lB lB.
T{
\fB--result-file\fR Option
T}:T{
Output File Names
T}
.T&
l l
l l
l l.
T{
\fB--result-file=x\fR
T}:T{
xbinlog.000999 and up
T}
T{
\fB--result-file=/tmp/\fR
T}:T{
/tmp/binlog.000999 and up
T}
T{
\fB--result-file=/tmp/x\fR
T}:T{
/tmp/xbinlog.000999 and up
T}
.TE
.sp 1
Example: mysqldump + mysqlbinlog for Backup and Restore
.PP
The following example describes a simple scenario that shows how to use
\fBmysqldump\fR
and
\fBmysqlbinlog\fR
together to back up a server\*(Aqs data and binary log, and how to use the backup to restore the server if data loss occurs\&. The example assumes that the server is running on host
\fIhost_name\fR
and its first binary log file is named
binlog\&.000999\&. Enter each command on a single line\&.
.PP
Use
\fBmysqlbinlog\fR
to make a continuous backup of the binary log:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-read\-from\-remote\-server \-\-host=\fIhost_name\fR \-\-raw
\-\-stop\-never binlog\&.000999
.fi
.if n \{\
.RE
.\}
.PP
Use
\fBmysqldump\fR
to create a dump file as a snapshot of the server\*(Aqs data\&. Use
\fB\-\-all\-databases\fR,
\fB\-\-events\fR, and
\fB\-\-routines\fR
to back up all data, and
\fB\-\-master\-data=2\fR
to include the current binary log coordinates in the dump file\&.
.sp
.if n \{\
.RS 4
.\}
.nf
mysqldump \-\-host=\fIhost_name\fR \-\-all\-databases \-\-events \-\-routines \-\-master\-data=2> \fIdump_file\fR
.fi
.if n \{\
.RE
.\}
.PP
Execute the
\fBmysqldump\fR
command periodically to create newer snapshots as desired\&.
.PP
If data loss occurs (for example, if the server unexpectedly exits), use the most recent dump file to restore the data:
.sp
.if n \{\
.RS 4
.\}
.nf
mysql \-\-host=\fIhost_name\fR \-u root \-p < \fIdump_file\fR
.fi
.if n \{\
.RE
.\}
.PP
Then use the binary log backup to re\-execute events that were written after the coordinates listed in the dump file\&. Suppose that the coordinates in the file look like this:
.sp
.if n \{\
.RS 4
.\}
.nf
\-\- CHANGE MASTER TO MASTER_LOG_FILE=\*(Aqbinlog\&.001002\*(Aq, MASTER_LOG_POS=27284;
.fi
.if n \{\
.RE
.\}
.PP
If the most recent backed\-up log file is named
binlog\&.001004, re\-execute the log events like this:
.sp
.if n \{\
.RS 4
.\}
.nf
mysqlbinlog \-\-start\-position=27284 binlog\&.001002 binlog\&.001003 binlog\&.001004
| mysql \-\-host=\fIhost_name\fR \-u root \-p
.fi
.if n \{\
.RE
.\}
.PP
You might find it easier to copy the backup files (dump file and binary log files) to the server host to make it easier to perform the restore operation, or if MySQL does not allow remote
root
access\&.
mysqlbinlog Backup Restrictions
.PP
Binary log backups with
\fBmysqlbinlog\fR
are subject to these restrictions:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBmysqlbinlog\fR
does not automatically reconnect to the MySQL server if the connection is lost (for example, if a server restart occurs or there is a network outage)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Prior to MySQL 5\&.7\&.19,
\fBmysqlbinlog\fR
does not get all events as they are committed, even if the server is configured with
sync_binlog=1\&. This means that some of the most recent events may be missing\&. To ensure that
\fBmysqlbinlog\fR
sees the most recent events, flush the binary log on the server that you are backing up\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The delay for a backup is similar to the delay for a replication replica\&.
.RE
.SH "SPECIFYING THE MYSQLBINLOG SERVER ID"
.PP
When invoked with the
\fB\-\-read\-from\-remote\-server\fR
option,
\fBmysqlbinlog\fR
connects to a MySQL server, specifies a server ID to identify itself, and requests binary log files from the server\&. You can use
\fBmysqlbinlog\fR
to request log files from a server in several ways:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Specify an explicitly named set of files: For each file,
\fBmysqlbinlog\fR
connects and issues a
Binlog dump
command\&. The server sends the file and disconnects\&. There is one connection per file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Specify the beginning file and
\fB\-\-to\-last\-log\fR:
\fBmysqlbinlog\fR
connects and issues a
Binlog dump
command for all files\&. The server sends all files and disconnects\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Specify the beginning file and
\fB\-\-stop\-never\fR
(which implies
\fB\-\-to\-last\-log\fR):
\fBmysqlbinlog\fR
connects and issues a
Binlog dump
command for all files\&. The server sends all files, but does not disconnect after sending the last one\&.
.RE
.PP
With
\fB\-\-read\-from\-remote\-server\fR
only,
\fBmysqlbinlog\fR
connects using a server ID of 0, which tells the server to disconnect after sending the last requested log file\&.
.PP
With
\fB\-\-read\-from\-remote\-server\fR
and
\fB\-\-stop\-never\fR,
\fBmysqlbinlog\fR
connects using a nonzero server ID, so the server does not disconnect after sending the last log file\&. The server ID is 65535 by default, but this can be changed with
\fB\-\-stop\-never\-slave\-server\-id\fR\&.
.PP
Thus, for the first two ways of requesting files, the server disconnects because
\fBmysqlbinlog\fR
specifies a server ID of 0\&. It does not disconnect if
\fB\-\-stop\-never\fR
is given because
\fBmysqlbinlog\fR
specifies a nonzero server ID\&.
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2021, Oracle and/or its affiliates.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
.sp
.SH "NOTES"
.IP " 1." 4
MySQL Internals: The Binary Log
.RS 4
\%https://dev.mysql.com/doc/internals/en/binary-log.html
.RE
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).