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NAME | SYNOPSIS | DESCRIPTION | MYSQLBINLOG HEX DUMP FORMAT | MYSQLBINLOG ROW EVENT DISPLAY | COPYRIGHT | NOTES | SEE ALSO | AUTHOR | COLOPHON |
MYSQLBINLOG(1) MariaDB Database System MYSQLBINLOG(1)
mysqlbinlog - utility for processing binary log files
mysqlbinlog [options] log_file ...
The server´s binary log consists of files containing “events” that
describe modifications to database contents. The server writes these
files in binary format. To display their contents in text format, use
the mysqlbinlog utility. You can also use mysqlbinlog to display the
contents of relay log files written by a slave server in a
replication setup because relay logs have the same format as binary
logs.
Invoke mysqlbinlog like this:
shell> mysqlbinlog [options] log_file ...
For example, to display the contents of the binary log file named
binlog.000003, use this command:
shell> mysqlbinlog binlog.0000003
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.
Events are preceded by header comments that provide additional
information. For example:
# at 141
#100309 9:28:36 server id 123 end_log_pos 245
Query thread_id=3350 exec_time=11 error_code=0
In the first line, the number following at indicates the starting
position of the event in the binary log file.
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 slave 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 master server. On a slave, it is the difference of the
end execution time on the slave minus the beginning execution time on
the master. The difference serves as an indicator of how much
replication lags behind the master. error_code indicates the result
from executing the event. Zero means that no error occurred.
The output from mysqlbinlog can be re-executed (for example, by using
it as input to mysql) to redo the statements in the log. This is
useful for recovery operations after a server crash. For other usage
examples, see the discussion later in this section.
Normally, you use mysqlbinlog to read binary log files directly and
apply them to the local MariaDB server. It is also possible to read
binary logs from a remote server by using the
--read-from-remote-server option. To read remote binary logs, the
connection parameter options can be given to indicate how to connect
to the server. These options are --host, --password, --port,
--protocol, --socket, and --user; they are ignored except when you
also use the --read-from-remote-server option.
mysqlbinlog supports the following options, which can be specified on
the command line or in the [mysqlbinlog] and [client] option file
groups.
· --help, -?
Display a help message and exit.
· --base64-output[=value]
This option determines when events should be displayed encoded as
base-64 strings using BINLOG statements. The option has these
allowable values (not case sensitive):
· AUTO ("automatic") or UNSPEC ("unspecified") displays BINLOG
statements automatically when necessary (that is, for format
description events and row events). This is the default if no
--base64-output option is given.
Note
Automatic BINLOG display is the only safe behavior if you
intend to use the output of mysqlbinlog 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.
· ALWAYS displays BINLOG statements whenever possible. This is
the implied value if the option is given as --base64-output
without a value. Both ALWAYS and not giving a value are
deprecated.
· NEVER causes BINLOG statements not to be displayed.
mysqlbinlog exits with an error if a row event is found that
must be displayed using BINLOG.
· DECODE-ROWS specifies to mysqlbinlog that you intend for row
events to be decoded and displayed as commented SQL
statements by also specifying the --verbose 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.
The --base64-output can be given as --base64-output or
--skip-base64-output (with the sense of AUTO or NEVER).
For examples that show the effect of --base64-output and
--verbose on row event output, see the section called
“MYSQLBINLOG ROW EVENT DISPLAY”.
· --binlog-row-event-max-size=path
The directory where character sets are installed.
· --character-sets-dir=path
The directory where character sets are installed.
· --database=db_name, -d db_name
This option causes mysqlbinlog to output entries from the binary
log (local log only) that occur while db_name has been selected
as the default database by USE.
The --database option for mysqlbinlog is similar to the
--binlog-do-db option for mysqld, but can be used to specify only
one database. If --database is given multiple times, only the
last instance is used.
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 --binlog-do-db depend on whether statement-based or
row-based logging is in use.
Statement-based logging. The --database option works as follows:
· While db_name is the default database, statements are output
whether they modify tables in db_name or a different
database.
· Unless db_name is selected as the default database,
statements are not output, even if they modify tables in
db_name.
· There is an exception for CREATE DATABASE, ALTER DATABASE,
and DROP DATABASE. The database being created, altered, or
dropped is considered to be the default database when
determining whether to output the statement.
Suppose that the binary log was created by executing these
statements using statement-based-logging:
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);
mysqlbinlog --database=test 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.
mysqlbinlog --database=db2 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.
Row-based logging. mysqlbinlog outputs only entries that
change tables belonging to db_name. 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. mysqlbinlog --database=test 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 mysqlbinlog
with the --database 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.)
Note
This option did not work correctly for mysqlbinlog with
row-based logging prior to MySQL 5.1.37.
· --debug[=debug_options], -# [debug_options]
Write a debugging log. A typical debug_options string is
´d:t:o,file_name´. The default is ´d:t:o,/tmp/mysqlbinlog.trace´.
· --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.
· --defaults-extra-file=name
Read this file after the global files are read.
· --defaults-file=name
Only read default options from the given file.
· --default-auth=name
Default authentication client-side plugin to use.
· --disable-log-bin, -D
Disable binary logging. This is useful for avoiding an endless
loop if you use the --to-last-log option and are sending the
output to the same MariaDB server. This option also is useful
when restoring after a crash to avoid duplication of the
statements you have logged.
This option requires that you have the SUPER privilege. It causes
mysqlbinlog to include a SET sql_log_bin = 0 statement in its
output to disable binary logging of the remaining output. The SET
statement is ineffective unless you have the SUPER privilege.
· --force-if-open
Force if binlog was not closed properly. Defaults to on; use
--skip-force-if-open to disable.
· --force-read, -f
With this option, if mysqlbinlog reads a binary log event that it
does not recognize, it prints a warning, ignores the event, and
continues. Without this option, mysqlbinlog stops if it reads
such an event.
· --hexdump, -H
Display a hex dump of the log in comments, as described in the
section called “MYSQLBINLOG HEX DUMP FORMAT”. The hex output can
be helpful for replication debugging.
· --host=host_name, -h host_name
Get the binary log from the MariaDB server on the given host.
· --local-load=path, -l path
Prepare local temporary files for LOAD DATA INFILE in the
specified directory.
· --no-defaults
Don't read default options from any option file.
· --offset=N, -o N
Skip the first N entries in the log.
· --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, mysqlbinlog
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.
· --plugin-dir=dir_name
Directory for client-side plugins.
· --print-defaults
Print the program argument list from all option files and exit.
· --port=port_num, -P port_num
The TCP/IP port number to use for connecting to a remote server,
or 0 for default to, in order of preference, my.cnf,
$MYSQL_TCP_PORT, /etc/services, built-in default (3306).
· --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.
· --open-files-limit=NUM
Sets the open_files_limit variable, which is used to reserve file
descriptors for mysqlbinlog.
· --read-from-remote-server, -R
Read the binary log from a MariaDB server rather than reading a
local log file. Any connection parameter options are ignored
unless this option is given as well. These options are --host,
--password, --port, --protocol, --socket, and --user.
This option requires that the remote server be running. It works
only for binary log files on the remote server, not relay log
files.
· --result-file=name, -r name
Direct output to the given file.
· --rewrite-db=name, -r name
Updates to a database with a different name than the original.
Example: rewrite-db='from->to'. For events that are binlogged as
statements, rewriting the database constitutes changing a
statement's default database from db1 to db2. There is no
statement analysis or rewrite of any kind, that is, if one
specifies "db1.tbl" in the statement explicitly, that occurrence
won't be changed to "db2.tbl". Row-based events are rewritten
correctly to use the new database name. Filtering (e.g. with
--database=name) happens after the database rewrites have been
performed. If you use this option on the command line and ">" has
a special meaning to your command interpreter, quote the value
(e.g. --rewrite-db="oldname->newname".
· --server-id=id
Display only those events created by the server having the given
server ID.
· --set-charset=charset_name
Add a SET NAMES charset_name statement to the output to specify
the character set to be used for processing log files.
· --short-form, -s
Display only the statements contained in the log, no extra info
and no row-based events. This is for testing only, and should not
be used in production systems. If you want to suppress
base64-output, consider using --base64-output=never instead.
· --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.
· --start-datetime=datetime
Start reading the binary log at the first event having a
timestamp equal to or later than the datetime argument. The
datetime value is relative to the local time zone on the machine
where you run mysqlbinlog. The value should be in a format
accepted for the DATETIME or TIMESTAMP data types. For example:
shell> mysqlbinlog --start-datetime="2014-12-25 11:25:56" binlog.000003
This option is useful for point-in-time recovery.
· --start-position=N, -j N
Start reading the binary log at the first event having a position
equal to or greater than N. This option applies to the first log
file named on the command line.
This option is useful for point-in-time recovery.
· --stop-datetime=datetime
Stop reading the binary log at the first event having a timestamp
equal to or later than the datetime argument. This option is
useful for point-in-time recovery. See the description of the
--start-datetime option for information about the datetime value.
This option is useful for point-in-time recovery.
· --stop-position=N
Stop reading the binary log at the first event having a position
equal to or greater than N. This option applies to the last log
file named on the command line.
This option is useful for point-in-time recovery.
· --to-last-log, -t
Do not stop at the end of the requested binary log from a MariaDB
server, but rather continue printing until the end of the last
binary log. If you send the output to the same MariaDB server,
this may lead to an endless loop, so this option requires
--read-from-remote-server.
· --user=user_name, -u user_name
The MariaDB username to use when connecting to a remote server.
· --verbose, -v
Reconstruct row events and display them as commented SQL
statements. If this option is given twice, the output includes
comments to indicate column data types and some metadata.
For examples that show the effect of --base64-output and
--verbose on row event output, see the section called
“MYSQLBINLOG ROW EVENT DISPLAY”.
· --version, -V
Display version information and exit.
You can also set the following variable by using --var_name=value
syntax:
· open_files_limit
Specify the number of open file descriptors to reserve.
You can pipe the output of mysqlbinlog into the mysql client to
execute the events contained in the binary log. This technique is
used to recover from a crash when you have an old backup. For
example:
shell> mysqlbinlog binlog.000001 | mysql -u root -p
Or:
shell> mysqlbinlog binlog.[0-9]* | mysql -u root -p
You can also redirect the output of mysqlbinlog 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 mysql program:
shell> mysqlbinlog binlog.000001 > tmpfile
shell> ... edit tmpfile ...
shell> mysql -u root -p < tmpfile
When mysqlbinlog is invoked with the --start-position 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 --stop-datetime option (to be able
to say, for example, “roll forward my databases to how they were
today at 10:30 a.m.”).
If you have more than one binary log to execute on the MariaDB
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 unsafe:
shell> mysqlbinlog binlog.000001 | mysql -u root -p # DANGER!!
shell> mysqlbinlog binlog.000002 | mysql -u root -p # DANGER!!
Processing binary logs this way using different 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 mysql process
terminates, the server drops the temporary table. When the second
mysql process attempts to use the table, the server reports “unknown
table.”
To avoid problems like this, use a single mysql process to execute
the contents of all binary logs that you want to process. Here is one
way to do so:
shell> mysqlbinlog binlog.000001 binlog.000002 | mysql -u root -p
Another approach is to write all the logs to a single file and then
process the file:
shell> mysqlbinlog binlog.000001 > /tmp/statements.sql
shell> mysqlbinlog binlog.000002 >> /tmp/statements.sql
shell> mysql -u root -p -e "source /tmp/statements.sql"
mysqlbinlog can produce output that reproduces a LOAD DATA INFILE
operation without the original data file. mysqlbinlog copies the
data to a temporary file and writes a LOAD DATA LOCAL INFILE
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 --local-load option.
Because mysqlbinlog converts LOAD DATA INFILE statements to LOAD DATA
LOCAL INFILE 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.
Warning
The temporary files created for LOAD DATA LOCAL statements are
not 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 original_file_name-#-#.
The --hexdump option causes mysqlbinlog to produce a hex dump of the
binary log contents:
shell> mysqlbinlog --hexdump master-bin.000001
The hex output consists of comment lines beginning with #, so the
output might look like this for the preceding command:
/*!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;
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
http://forge.mysql.com/wiki/MySQL_Internals_Binary_Log .)
· Position: The byte position within the log file.
· Timestamp: The event timestamp. In the example shown, ´9d fc 5c
43´ is the representation of ´051024 17:24:13´ in hexadecimal.
· Type: The event type code. In the example shown, ´0f´ indicates a
FORMAT_DESCRIPTION_EVENT. The following table lists the possible
type codes.
┌─────┬──────────────────────────┬───────────────────────────────┐
│Type │ Name │ Meaning │
├─────┼──────────────────────────┼───────────────────────────────┤
│00 │ UNKNOWN_EVENT │ This event should never be │
│ │ │ present in the log. │
├─────┼──────────────────────────┼───────────────────────────────┤
│01 │ START_EVENT_V3 │ This indicates the start of a │
│ │ │ log file written by MySQL 4 │
│ │ │ or earlier. │
├─────┼──────────────────────────┼───────────────────────────────┤
│02 │ QUERY_EVENT │ The most common type of │
│ │ │ events. These contain │
│ │ │ statements executed on the │
│ │ │ master. │
├─────┼──────────────────────────┼───────────────────────────────┤
│03 │ STOP_EVENT │ Indicates that master has │
│ │ │ stopped. │
├─────┼──────────────────────────┼───────────────────────────────┤
│04 │ ROTATE_EVENT │ Written when the master │
│ │ │ switches to a new log file. │
├─────┼──────────────────────────┼───────────────────────────────┤
│05 │ INTVAR_EVENT │ Used for AUTO_INCREMENT │
│ │ │ values or when the │
│ │ │ LAST_INSERT_ID() function is │
│ │ │ used in the statement. │
├─────┼──────────────────────────┼───────────────────────────────┤
│06 │ LOAD_EVENT │ Used for LOAD DATA INFILE in │
│ │ │ MySQL 3.23. │
├─────┼──────────────────────────┼───────────────────────────────┤
│07 │ SLAVE_EVENT │ Reserved for future use. │
├─────┼──────────────────────────┼───────────────────────────────┤
│08 │ CREATE_FILE_EVENT │ Used for LOAD DATA INFILE │
│ │ │ statements. This indicates │
│ │ │ the start of execution of │
│ │ │ such a statement. A temporary │
│ │ │ file is created on the slave. │
│ │ │ Used in MySQL 4 only. │
├─────┼──────────────────────────┼───────────────────────────────┤
│09 │ APPEND_BLOCK_EVENT │ Contains data for use in a │
│ │ │ LOAD DATA INFILE statement. │
│ │ │ The data is stored in the │
│ │ │ temporary file on the slave. │
├─────┼──────────────────────────┼───────────────────────────────┤
│0a │ EXEC_LOAD_EVENT │ Used for LOAD DATA INFILE │
│ │ │ statements. The contents of │
│ │ │ the temporary file is stored │
│ │ │ in the table on the slave. │
│ │ │ Used in MySQL 4 only. │
├─────┼──────────────────────────┼───────────────────────────────┤
│0b │ DELETE_FILE_EVENT │ Rollback of a LOAD DATA │
│ │ │ INFILE statement. The │
│ │ │ temporary file should be │
│ │ │ deleted on the slave. │
├─────┼──────────────────────────┼───────────────────────────────┤
│0c │ NEW_LOAD_EVENT │ Used for LOAD DATA INFILE in │
│ │ │ MySQL 4 and earlier. │
├─────┼──────────────────────────┼───────────────────────────────┤
│0d │ RAND_EVENT │ Used to send information │
│ │ │ about random values if the │
│ │ │ RAND() function is used in │
│ │ │ the statement. │
├─────┼──────────────────────────┼───────────────────────────────┤
│0e │ USER_VAR_EVENT │ Used to replicate user │
│ │ │ variables. │
├─────┼──────────────────────────┼───────────────────────────────┤
│0f │ FORMAT_DESCRIPTION_EVENT │ This indicates the start of a │
│ │ │ log file written by MySQL 5 │
│ │ │ or later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│10 │ XID_EVENT │ Event indicating commit of an │
│ │ │ XA transaction. │
├─────┼──────────────────────────┼───────────────────────────────┤
│11 │ BEGIN_LOAD_QUERY_EVENT │ Used for LOAD DATA INFILE │
│ │ │ statements in MySQL 5 and │
│ │ │ later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│12 │ EXECUTE_LOAD_QUERY_EVENT │ Used for LOAD DATA INFILE │
│ │ │ statements in MySQL 5 and │
│ │ │ later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│13 │ TABLE_MAP_EVENT │ Information about a table │
│ │ │ definition. Used in MySQL │
│ │ │ 5.1.5 and later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│14 │ PRE_GA_WRITE_ROWS_EVENT │ Row data for a single table │
│ │ │ that should be created. Used │
│ │ │ in MySQL 5.1.5 to 5.1.17. │
├─────┼──────────────────────────┼───────────────────────────────┤
│15 │ PRE_GA_UPDATE_ROWS_EVENT │ Row data for a single table │
│ │ │ that needs to be updated. │
│ │ │ Used in MySQL 5.1.5 to │
│ │ │ 5.1.17. │
├─────┼──────────────────────────┼───────────────────────────────┤
│16 │ PRE_GA_DELETE_ROWS_EVENT │ Row data for a single table │
│ │ │ that should be deleted. Used │
│ │ │ in MySQL 5.1.5 to 5.1.17. │
├─────┼──────────────────────────┼───────────────────────────────┤
│17 │ WRITE_ROWS_EVENT │ Row data for a single table │
│ │ │ that should be created. Used │
│ │ │ in MySQL 5.1.18 and later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│18 │ UPDATE_ROWS_EVENT │ Row data for a single table │
│ │ │ that needs to be updated. │
│ │ │ Used in MySQL 5.1.18 and │
│ │ │ later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│19 │ DELETE_ROWS_EVENT │ Row data for a single table │
│ │ │ that should be deleted. Used │
│ │ │ in MySQL 5.1.18 and later. │
├─────┼──────────────────────────┼───────────────────────────────┤
│1a │ INCIDENT_EVENT │ Something out of the ordinary │
│ │ │ happened. Added in MySQL │
│ │ │ 5.1.18. │
└─────┴──────────────────────────┴───────────────────────────────┘
· Master ID: The server ID of the master that created the event.
· Size: The size in bytes of the event.
· Master Pos: The position of the next event in the original master
log file.
· Flags: 16 flags. Currently, the following flags are used. The
others are reserved for future use.
┌─────┬─────────────────────────────┬────────────────────────────┐
│Flag │ Name │ Meaning │
├─────┼─────────────────────────────┼────────────────────────────┤
│01 │ LOG_EVENT_BINLOG_IN_USE_F │ Log file correctly closed. │
│ │ │ (Used only in │
│ │ │ FORMAT_DESCRIPTION_EVENT.) │
│ │ │ If this flag is set (if │
│ │ │ the flags are, for │
│ │ │ example, ´01 00´) in a │
│ │ │ FORMAT_DESCRIPTION_EVENT, │
│ │ │ the log file has not been │
│ │ │ properly closed. Most │
│ │ │ probably this is because │
│ │ │ of a master crash (for │
│ │ │ example, due to power │
│ │ │ failure). │
├─────┼─────────────────────────────┼────────────────────────────┤
│02 │ │ Reserved for future use. │
├─────┼─────────────────────────────┼────────────────────────────┤
│04 │ LOG_EVENT_THREAD_SPECIFIC_F │ Set if the event is │
│ │ │ dependent on the │
│ │ │ connection it was executed │
│ │ │ in (for example, ´04 00´), │
│ │ │ for example, if the event │
│ │ │ uses temporary tables. │
├─────┼─────────────────────────────┼────────────────────────────┤
│08 │ LOG_EVENT_SUPPRESS_USE_F │ Set in some circumstances │
│ │ │ when the event is not │
│ │ │ dependent on the default │
│ │ │ database. │
└─────┴─────────────────────────────┴────────────────────────────┘
The following examples illustrate how mysqlbinlog 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 --base64-output=DECODE-ROWS and --verbose options may be
used to affect row event output.
Suppose that the server is using row-based binary logging and that
you execute the following sequence of statements:
CREATE TABLE t
(
id INT NOT NULL,
name VARCHAR(20) NOT NULL,
date DATE NULL
) ENGINE = InnoDB;
START TRANSACTION;
INSERT INTO t VALUES(1, ´apple´, NULL);
UPDATE t SET name = ´pear´, date = ´2009-01-01´ WHERE id = 1;
DELETE FROM t WHERE id = 1;
COMMIT;
By default, mysqlbinlog 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:
shell> mysqlbinlog log_file
...
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
BINLOG ´
fAS3SBMBAAAALAAAANoAAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBcBAAAAKAAAAAIBAAAQABEAAAAAAAEAA//8AQAAAAVhcHBsZQ==
´/*!*/;
...
# at 302
#080828 15:03:08 server id 1 end_log_pos 356 Update_rows: table id 17 flags: STMT_END_F
BINLOG ´
fAS3SBMBAAAALAAAAC4BAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBgBAAAANgAAAGQBAAAQABEAAAAAAAEAA////AEAAAAFYXBwbGX4AQAAAARwZWFyIbIP
´/*!*/;
...
# at 400
#080828 15:03:08 server id 1 end_log_pos 442 Delete_rows: table id 17 flags: STMT_END_F
BINLOG ´
fAS3SBMBAAAALAAAAJABAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBkBAAAAKgAAALoBAAAQABEAAAAAAAEAA//4AQAAAARwZWFyIbIP
´/*!*/;
To see the row events as comments in the form of “pseudo-SQL”
statements, run mysqlbinlog with the --verbose or -v option. The
output will contain lines beginning with ###:
shell> mysqlbinlog -v log_file
...
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
BINLOG ´
fAS3SBMBAAAALAAAANoAAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBcBAAAAKAAAAAIBAAAQABEAAAAAAAEAA//8AQAAAAVhcHBsZQ==
´/*!*/;
### INSERT INTO test.t
### SET
### @1=1
### @2=´apple´
### @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 ´
fAS3SBMBAAAALAAAAC4BAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBgBAAAANgAAAGQBAAAQABEAAAAAAAEAA////AEAAAAFYXBwbGX4AQAAAARwZWFyIbIP
´/*!*/;
### UPDATE test.t
### WHERE
### @1=1
### @2=´apple´
### @3=NULL
### SET
### @1=1
### @2=´pear´
### @3=´2009:01:01´
...
# at 400
#080828 15:03:08 server id 1 end_log_pos 442 Delete_rows: table id 17 flags: STMT_END_F
BINLOG ´
fAS3SBMBAAAALAAAAJABAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBkBAAAAKgAAALoBAAAQABEAAAAAAAEAA//4AQAAAARwZWFyIbIP
´/*!*/;
### DELETE FROM test.t
### WHERE
### @1=1
### @2=´pear´
### @3=´2009:01:01´
Specify --verbose or -v twice to also display data types and some
metadata for each column. The output will contain an additional
comment following each column change:
shell> mysqlbinlog -vv log_file
...
# at 218
#080828 15:03:08 server id 1 end_log_pos 258 Write_rows: table id 17 flags: STMT_END_F
BINLOG ´
fAS3SBMBAAAALAAAANoAAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBcBAAAAKAAAAAIBAAAQABEAAAAAAAEAA//8AQAAAAVhcHBsZQ==
´/*!*/;
### INSERT INTO test.t
### SET
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=´apple´ /* 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 ´
fAS3SBMBAAAALAAAAC4BAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBgBAAAANgAAAGQBAAAQABEAAAAAAAEAA////AEAAAAFYXBwbGX4AQAAAARwZWFyIbIP
´/*!*/;
### UPDATE test.t
### WHERE
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=´apple´ /* 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=´pear´ /* VARSTRING(20) meta=20 nullable=0 is_null=0 */
### @3=´2009:01:01´ /* 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 ´
fAS3SBMBAAAALAAAAJABAAAAABEAAAAAAAAABHRlc3QAAXQAAwMPCgIUAAQ=
fAS3SBkBAAAAKgAAALoBAAAQABEAAAAAAAEAA//4AQAAAARwZWFyIbIP
´/*!*/;
### DELETE FROM test.t
### WHERE
### @1=1 /* INT meta=0 nullable=0 is_null=0 */
### @2=´pear´ /* VARSTRING(20) meta=20 nullable=0 is_null=0 */
### @3=´2009:01:01´ /* DATE meta=0 nullable=1 is_null=0 */
You can tell mysqlbinlog to suppress the BINLOG statements for row
events by using the --base64-output=DECODE-ROWS option. This is
similar to --base64-output=NEVER but does not exit with an error if a
row event is found. The combination of --base64-output=DECODE-ROWS
and --verbose provides a convenient way to see row events only as SQL
statements:
shell> mysqlbinlog -v --base64-output=DECODE-ROWS log_file
...
# 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=´apple´
### @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=´apple´
### @3=NULL
### SET
### @1=1
### @2=´pear´
### @3=´2009:01:01´
...
# 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=´pear´
### @3=´2009:01:01´
Note
You should not suppress BINLOG statements if you intend to
re-execute mysqlbinlog output.
The SQL statements produced by --verbose 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:
· The original column names are lost and replaced by @N, where N is
a column number.
· Character set information is not available in the binary log,
which affects string column display:
· 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.
· For multi-byte 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) will be used as the data
type for values from either of these column types:
CHAR(4) CHARACTER SET latin1
CHAR(2) CHARACTER SET ucs2
· Due to the storage format for events of type
UPDATE_ROWS_EVENT, UPDATE statements are displayed with the
WHERE clause preceding the SET clause.
Proper interpretation of row events requires the information from the
format description event at the beginning of the binary log. Because
mysqlbinlog 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.
If the binary log is known not to contain any events requiring a
BINLOG statement (that is, no row events), the --base64-output=NEVER
option can be used to prevent this header from being written.
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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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 http://www.gnu.org/licenses/.
1. Bug#42941
http://bugs.mysql.com/bug.php?id=42941
For more information, please refer to the MariaDB Knowledge Base,
available online at https://mariadb.com/kb/
MariaDB Foundation (http://www.mariadb.org/).
This page is part of the MariaDB (MariaDB database server) project.
Information about the project can be found at ⟨http://mariadb.org/⟩.
If you have a bug report for this manual page, see
⟨https://mariadb.com/kb/en/mariadb/reporting-bugs/⟩. This page was
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COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
MariaDB 10.1 14/12/2015 MYSQLBINLOG(1)