myisam_ftdump - Online in the Cloud

PROGRAM:

NAME

myisam_ftdump - display full-text index information

SYNOPSIS

myisam_ftdump [options] tbl_name index_num

DESCRIPTION

myisam_ftdump displays information about FULLTEXT indexes in MyISAM tables. It reads the
MyISAM index file directly, so it must be run on the server host where the table is
located. Before using myisam_ftdump, be sure to issue a FLUSH TABLES statement first if
the server is running.

myisam_ftdump scans and dumps the entire index, which is not particularly fast. On the
other hand, the distribution of words changes infrequently, so it need not be run often.

Invoke myisam_ftdump like this:

shell> myisam_ftdump [options] tbl_name index_num

The tbl_name argument should be the name of a MyISAM table. You can also specify a table
by naming its index file (the file with the .MYI suffix). If you do not invoke
myisam_ftdump in the directory where the table files are located, the table or index file
name must be preceded by the path name to the table's database directory. Index numbers
begin with 0.

Example: Suppose that the test database contains a table named mytexttable that has the
following definition:

CREATE TABLE mytexttable
(
id INT NOT NULL,
txt TEXT NOT NULL,
PRIMARY KEY (id),
FULLTEXT (txt)
) ENGINE=MyISAM;

The index on id is index 0 and the FULLTEXT index on txt is index 1. If your working
directory is the test database directory, invoke myisam_ftdump as follows:

shell> myisam_ftdump mytexttable 1

If the path name to the test database directory is /usr/local/mysql/data/test, you can
also specify the table name argument using that path name. This is useful if you do not
invoke myisam_ftdump in the database directory:

shell> myisam_ftdump /usr/local/mysql/data/test/mytexttable 1

You can use myisam_ftdump to generate a list of index entries in order of frequency of
occurrence like this:

shell> myisam_ftdump -c mytexttable 1 | sort -r

myisam_ftdump supports the following options:

· --help, -h -?

Display a help message and exit.

· --count, -c

Calculate per-word statistics (counts and global weights).

· --dump, -d

Dump the index, including data offsets and word weights.

· --length, -l

Report the length distribution.

· --stats, -s

Report global index statistics. This is the default operation if no other operation is
specified.

· --verbose, -v

Verbose mode. Print more output about what the program does.

COPYRIGHT

Copyright © 1997, 2016, 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/.

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