mysql_explain_log

MYSQL_EXPLAIN_LOG(1)         MySQL Database System        MYSQL_EXPLAIN_LOG(1)



NAME
       mysql_explain_log - use EXPLAIN on statements in query log

SYNOPSIS
       mysql_explain_log [options] < log_file

DESCRIPTION
       mysql_explain_log reads its standard input for query log contents. It
       uses EXPLAIN to analyze SELECT statements found in the input.  UPDATE
       statements are rewritten to SELECT statements and also analyzed with
       EXPLAIN.  mysql_explain_log then displays a summary of its results.

       The results may assist you in determining which queries result in table
       scans and where it would be beneficial to add indexes to your tables.

       Invoke mysql_explain_log like this, where log_file contains all or part
       of a MySQL query log:

          shell> mysql_explain_log [options] < log_file

       mysql_explain_log understands the following options:

       o  --date=YYMMDD, -d YYMMDD

          Select entries from the log only for the given date.

       o  --host=host_name, -h host_name

          Connect to the MySQL server on the given host.

       o  --password=password, -ppassword

          The password to use when connecting to the server.

          Specifying a password on the command line should be considered
          insecure. See Section 7.6, "Keeping Your Password Secure".

       o  --printerror=1, -e 1

          Enable error output.

       o  --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.

       o  --user=user_name, -u user_name

          The MySQL username to use when connecting to the server.

COPYRIGHT
       Copyright 1997-2006 MySQL AB

       This documentation is NOT distributed under a GPL license. Use of this
       documentation is subject to the following terms: You may create a
       printed copy of this documentation solely for your own personal use.
       Conversion to other formats is allowed as long as the actual content is
       not altered or edited in any way. You shall not publish or distribute
       this documentation in any form or on any media, except if you
       distribute the documentation in a manner similar to how MySQL
       disseminates it (that is, electronically for download on a Web site
       with the software) or on a CD-ROM or similar medium, provided however
       that the documentation is disseminated together with the software on
       the same medium. Any other use, such as any dissemination of printed
       copies or use of this documentation, in whole or in part, in another
       publication, requires the prior written consent from an authorized
       representative of MySQL AB. MySQL AB reserves any and all rights to
       this documentation not expressly granted above.

       Please email <docs@mysql.com> for more information.

SEE ALSO
       isamchk(1), isamlog(1), msql2mysql(1), myisam_ftdump(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), mysqlbinlog(1), mysqlcheck(1),
       mysqld(1), mysqld(8), 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                         11/02/2006              MYSQL_EXPLAIN_LOG(1)