( Update log

Info Catalog ( Query log ( Log Files ( Binary log
 5.9.3 The Update Log
 * The update log has been deprecated and replaced by the binary
 log.  Binary log.  The binary log can do anything the old update
 log could do, and more. _The update log is unavailable as of MySQL
 When started with the `--log-update[=FILE_NAME]' option, `mysqld'
 writes a log file containing all SQL statements that update data. If no
 FILE_NAME value is given, the default name is name of the host machine.
 If a filename is given, but it doesn't contain a leading path, the file
 is written in the data directory. If `file_name' doesn't have an
 extension, `mysqld' creates log files with names of the form
 FILE_NAME.###, where ### is a number that is incremented each time you
 start the server or flush the logs.
 * For this naming scheme to work, you must not create your own
 files with the same names as those that might be used for the log file
 Update logging is smart because it logs only statements that really
 update data. So, an `UPDATE' or a `DELETE' with a `WHERE' that finds no
 rows is not written to the log. It even skips `UPDATE' statements that
 set a column to its existing value.
 The update logging is done immediately after a query completes but
 before any locks are released or any commit is done. This ensures that
 statements are logged in execution order.
 If you want to update a database from update log files, you could do the
 following (assuming that your update logs have names of the form
      shell> ls -1 -t -r file_name.[0-9]* | xargs cat | mysql
 `ls' is used to sort the update log filenames into the right order.
 This can be useful if you have to revert to backup files after a crash
 and you want to redo the updates that occurred between the time of the
 backup and the crash.
Info Catalog ( Query log ( Log Files ( Binary log
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