myisam_ftdump - display full-text index information
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
sure to issue a FLUSH TABLES statement first if the server is running.
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.
shell> myisam_ftdump [options] tbl_name index_num
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),
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
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
On Windows, use:
shell> myisam_ftdump -c mytexttable 1 | sort /R
supports the following options:
, -h -?
Display a help message and exit.
Calculate per-word statistics (counts and global weights).
Dump the index, including data offsets and word weights.
Report the length distribution.
Report global index statistics. This is the default operation if no other
operation is specified.
Verbose mode. Print more output about what the program does.
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