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NAME
mysqlbinlog - utility for processing binary log files
SYNOPSIS
mysqlbinlog [options] log_file ...
DESCRIPTION
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. The
binary log and relay log are discussed further in Section 5.2.4, “The Binary Log”, and Section 16.2.2,
“Replication Relay and Status 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. See Section 16.1.2, “Replication Formats”, for information about
logging modes.
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 and in Section 7.5, “Point-in-Time (Incremental)
Recovery Using the Binary Log”.
Normally, you use mysqlbinlog 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 --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] groups of an option file. mysqlbinlog also supports the options for
processing option files described at Section 4.2.3.4, “Command-Line Options that Affect Option-File
Handling”.
• --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 permissible values (not case sensitive):
• AUTO ("automatic") or UNSPEC ("unspecified") displays BINLOG statements automatically when
necessary (that is, for format description events and row events). If no --base64-output option
is given, the effect is the same as --base64-output=AUTO.
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. If the --base64-output option is given
without a value, the effect is the same as --base64-output=ALWAYS.
Note
Changes to replication in MySQL 5.6 make output generated by this option unusable, so ALWAYS
is deprecated as of MySQL 5.5.8 and will be an invalid value in MySQL 5.6
• 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.
For examples that show the effect of --base64-output and --verbose on row event output, see the
section called “MYSQLBINLOG ROW EVENT DISPLAY”.
• --bind-address=ip_address
On a computer having multiple network interfaces, this option can be used to select which interface
is employed when connecting to the MySQL server.
This option is supported beginning with MySQL 5.5.8.
• --character-sets-dir=path
The directory where character sets are installed. See Section 10.5, “Character Set Configuration”.
• --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 is 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
Prior to MySQL Cluster NDB 7.2.2, this option did not work correctly with MySQL Cluster tables
unless, unless the binary log was generated using --log-bin-use-v1-row-events=0. (Bug #13067813)
• --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.
• --default-auth=plugin
The client-side authentication plugin to use. See Section 6.3.6, “Pluggable Authentication”.
This option was added in MySQL 5.5.10.
• --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 MySQL 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, -F
Read binary log files even if they are open or were not closed properly.
• --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 MySQL server on the given host.
• --local-load=path, -l path
Prepare local temporary files for LOAD DATA INFILE in the specified directory.
Important
These temporary files are not automatically removed by mysqlbinlog or any other MySQL program.
• --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. See Section 6.1.2.1, “End-
User Guidelines for Password Security”. You can use an option file to avoid giving the password on
the command line.
• --plugin-dir=path
The directory in which to look for plugins. It may be necessary to specify this option if the
--default-auth option is used to specify an authentication plugin but mysqlbinlog does not find it.
See Section 6.3.6, “Pluggable Authentication”.
This option was added in MySQL 5.5.10.
• --port=port_num, -P port_num
The TCP/IP port number to use for connecting to a remote server.
• --position=N
Deprecated. Use --start-position instead. --position was removed in MySQL 5.5.3.
• --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. For details on the
permissible values, see Section 4.2.2, “Connecting to the MySQL Server”.
• --read-from-remote-server, -R
Read the binary log from a MySQL 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.
• --server-id=id
Display only those events created by the server having the given server ID.
• --server-id-bits=N
Use only the first N bits of the server_id to identify the server. If the binary log was written by a
mysqld with server-id-bits set to less than 32 and user data stored in the most significant bit,
running mysqlbinlog with --server-id-bits set to 32 enables this data to be seen.
This option is supported only by the versions of mysqlbinlog supplied with the MySQL Cluster
distribution, or built from the MySQL Cluster sources.
• --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, without any extra information or row-based events.
This is for testing only, and should not be used in production systems.
• --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="2005-12-25 11:25:56" binlog.000003
This option is useful for point-in-time recovery. See Section 7.3, “Example Backup and Recovery
Strategy”.
• --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. See Section 7.3, “Example Backup and Recovery
Strategy”.
• --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. See Section 7.3, “Example Backup and Recovery
Strategy”.
• --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. See Section 7.3, “Example Backup and Recovery
Strategy”.
• --to-last-log, -t
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 --read-from-remote-server.
• --user=user_name, -u user_name
The MySQL user name 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.
In MySQL 5.5, the version number shown for mysqlbinlog is always 3.3.
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 (see Section 7.5,
“Point-in-Time (Incremental) Recovery Using the Binary Log”). 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 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 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 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 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. See Section 6.1.6, “Security Issues with LOAD DATA LOCAL”.
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-#-#.
MYSQLBINLOG HEX DUMP FORMAT
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 MySQL Internals: The Binary Log[1].
• 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. │
└──────┴─────────────────────────────┴────────────────────────────────────────────────┘
MYSQLBINLOG ROW EVENT DISPLAY
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
Copyright © 1997, 2014, Oracle and/or its affiliates. All rights reserved.
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/.
NOTES
1. MySQL Internals: The Binary Log
http://dev.mysql.com/doc/internals/en/binary-log.html
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/.
AUTHOR
Oracle Corporation (http://dev.mysql.com/).
MySQL 5.5 03/14/2014 MYSQLBINLOG(1)