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License: GNU GPLv2
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Developer / Owner: Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc., 2010-2015 MariaDB Foundation
Short description:
Manual page and help for the mysqlbinlog linux command. The server binary log consists of files containing "events" that describe how to modify the contents of the database. The server writes these files in binary format. The mysqlbinlog utility is used to display the content in text. You can also use mysqlbinlog to display the contents of the forwarding log files written by the slave server in the replication option because the format of the forwarding logs is the same as the format of the binary logs.
Man page output
man mysqlbinlogMYSQLBINLOG(1) MariaDB Database System MYSQLBINLOG(1)
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.
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.
• --open-files-limit=NUM
Sets the open_files_limit variable, which is used to reserve file descriptors for
mysqlbinlog.
• --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.
• --raw
Requires -R. Output raw binlog data instead of SQL statements. Output files named
after server logs.
• --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. With --raw this is a prefix for the file names.
• --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-never
Wait for more data from the server instead of stopping at the end of the last log.
Implies --to-last-log.
• --stop-never-slave-server-id
The slave server_id used for --read-from-remote-server --stop-never.
• --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-#-#.
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
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. │
└─────┴─────────────────────────────┴─────────────────────────────────────────────────┘
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 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 02110-1335 USA or see http://www.gnu.org/licenses/.
NOTES
1. Bug#42941
http://bugs.mysql.com/bug.php?id=42941
SEE ALSO
For more information, please refer to the MariaDB Knowledge Base, available online at
https://mariadb.com/kb/
AUTHOR
MariaDB Foundation (http://www.mariadb.org/).
MariaDB 10.3 9 May 2017 MYSQLBINLOG(1)
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