myisam_ftdump [options] tbl_name index_num
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
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
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),
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 on Unix-like systems:
shell> myisam_ftdump -c mytexttable 1 | sort -r
Calculate per-word statistics (counts and global weights).
o --dump, -d
Dump the index, including data offsets and word weights.
o --length, -l
Report the length distribution.
o --stats, -s
Report global index statistics. This is the default operation if no
other operation is specified.
o --verbose, -v
Verbose mode. Print more output about what the program does.
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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.
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with the program; if not, write to the Free Software Foundation, Inc.,
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For more information, please refer to the MySQL Reference Manual, which
may already be installed locally and which is also available online at
Oracle Corporation (http://dev.mysql.com/).
MySQL 5.5 08/28/2018 MYISAM_FTDUMP(1)
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