mysqlbinlog



MYSQLBINLOG(1)               MySQL Database System              MYSQLBINLOG(1)




NAME

       mysqlbinlog - utility for processing binary log files


SYNOPSIS

       mysqlbinlog [options] log-file ...


DESCRIPTION

       The binary log files that the server generates are written in binary
       format. To examine these files in text format, use the mysqlbinlog
       utility. It is available as of MySQL 3.23.14.

       Invoke mysqlbinlog like this:

       shell> mysqlbinlog [options] log-file ...

       For example, to display the contents of the binary log binlog.000003,
       use this command:

       shell> mysqlbinlog binlog.0000003

       The output includes all statements contained in binlog.000003, together
       with other information such as the time each statement took, the thread
       ID of the client that issued it, the timestamp when it was issued, and
       so forth.

       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.

       When you read remote binary logs, the connection parameter options can
       be given to indicate how to connect to the server, but they are ignored
       unless you also specify the --read-from-remote-server option. These
       options are --host, --password, --port, --protocol, --socket, and
       --user.

       You can also use mysqlbinlog to read relay log files written by a slave
       server in a replication setup. Relay logs have the same format as
       binary log files.

       The binary log is discussed further in Section 8.4, “The Binary Log”.

       mysqlbinlog supports the following options:

       ·  --help, -?

          Display a help message and exit.

       ·  --database=db_name, -d db_name

          List entries for just this database (local log only).

       ·  --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.

       ·  --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.

       ·  --offset=N, -o N

          Skip the first N entries.

       ·  --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, you are prompted for
          one.

       ·  --port=port_num, -P port_num

          The TCP/IP port number to use for connecting to a remote server.

       ·  --position=N, -j N

          Deprecated, use --start-position instead (starting from MySQL
          4.1.4).

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

          The connection protocol to use. Added in MySQL 4.1.

       ·  --read-from-remote-server, -R

          Read the binary log from a MySQL server. Any connection parameter
          options are ignored unless this option is given as well. These
          options are --host, --password, --port, --protocol, --socket, and
          --user.

       ·  --result-file=name, -r name

          Direct output to the given file.

       ·  --short-form, -s

          Display only the statements contained in the log, without any extra
          information.

       ·  --socket=path, -S path

          The socket file to use for the connection.

       ·  --start-datetime=datetime

          Start reading the binary log at the first event having a datetime
          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="2004-12-25 11:25:56" binlog.000003
          This option is available as of MySQL 4.1.4. It is useful for
          point-in-time recovery.

       ·  --stop-datetime=datetime

          Stop reading the binary log at the first event having a datetime
          equal or posterior to the datetime argument. See the description of
          the --start-datetime option for information about the datetime
          value. This option is available as of MySQL 4.1.4. It is useful for
          point-in-time recovery.

       ·  --start-position=N

          Start reading the binary log at the first event having a position
          equal to the N argument. Available as of MySQL 4.1.4 (previously
          named --position).

       ·  --stop-position=N

          Stop reading the binary log at the first event having a position
          equal or greater than the N argument. Available as of MySQL 4.1.4.

       ·  --to-last-log, -t

          Do not stop at the end of the requested binary log of the 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. Available as of MySQL 4.1.2.

       ·  --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.  Note: This option requires that you have the SUPER
          privilege. Available as of MySQL 4.1.8.

       ·  --user=user_name, -u user_name

          The MySQL username to use when connecting to a remote server.

       ·  --version, -V

          Display version information and exit.

       You can also set the following variable by using --var_name=value
       options:

       ·  open_files_limit

          Specify the number of open file descriptors to reserve.

       You can pipe the output of mysqlbinlog into a mysql client to execute
       the statements contained in the binary log. This is used to recover
       from a crash when you have an old backup (see Section 6.1, “Database
       Backups”):

       shell> mysqlbinlog hostname-bin.000001 | mysql

       Or:

       shell> mysqlbinlog hostname-bin.[0-9]* | mysql

       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.

       mysqlbinlog has the --position option, which prints only those
       statements 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 or start when it sees an event of 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 AM”).

       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 hostname-bin.000001 | mysql # DANGER!!
       shell> mysqlbinlog hostname-bin.000002 | mysql # 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 connection to execute the
       contents of all binary logs that you want to process. Here is one way
       to do this:

       shell> mysqlbinlog hostname-bin.000001 hostname-bin.000002 | mysql

       Another approach is to do this:

       shell> mysqlbinlog hostname-bin.000001 >  /tmp/statements.sql
       shell> mysqlbinlog hostname-bin.000002 >> /tmp/statements.sql
       shell> mysql -e "source /tmp/statements.sql"

       In MySQL 3.23, the binary log did not contain the data to load for LOAD
       DATA INFILE statements. To execute such a statement from a binary log
       file, the original data file was needed. Starting from MySQL 4.0.14,
       the binary log does contain the data, so mysqlbinlog can produce output
       that reproduces the 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 to
       allow LOCAL capability. See Section 3.4, “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-#-#.

       Before MySQL 4.1, mysqlbinlog could not prepare output suitable for
       mysql if the binary log contained interlaced statements originating
       from different clients that used temporary tables of the same name.
       This is fixed in MySQL 4.1. However, the problem still existed for LOAD
       DATA INFILE statements until it was fixed in MySQL 4.1.8.


SEE ALSO

       isamchk(1), isamlog(1), msql2mysql(1), myisamchk(1), myisamlog(1),
       myisampack(1), mysql(1), mysql.server(1), mysql_config(1),
       mysql_fix_privilege_tables(1), mysql_zap(1), mysqlaccess(1),
       mysqladmin(1), mysqlcheck(1), mysqld(1), mysqld_multi(1),
       mysqld_safe(1), mysqldump(1), mysqlhotcopy(1), mysqlimport(1),
       mysqlshow(1), pack_isam(1), perror(1), replace(1), safe_mysqld(1)

       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

       MySQL AB (http://www.mysql.com/).  This software comes with no
       warranty.



MySQL 4.1                         11/30/2005                    MYSQLBINLOG(1)

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