отображать информацию полнотекстового индекса (display full-text index information)
Имя (Name)
myisam_ftdump - display full-text index information
Синопсис (Synopsis)
myisam_ftdump [options] tbl_name index_num
Описание (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
mytexttablel that has the following definition:
CREATE TABLE mytexttable
(
id INT NOT NULL,
txt TEXT NOT NULL,
PRIMARY KEY (id),
FULLTEXT (txt)
);
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.
Смотри также (See also)
For more information, please refer to the MariaDB Knowledge Base,
available online at https://mariadb.com/kb/
