MySQL Server supports a
statement that returns information from the MySQL Reference manual
(see Section 13.8.3, “HELP Syntax”). Several tables in the
mysql system database contain the information
needed to support this statement (see
Section 5.3, “The mysql System Database”). The proper operation of this
statement requires that these help tables be initialized, which is
done by processing the contents of the
If you install MySQL using a binary or source distribution on Unix, help table content initialization occurs when you initialize the data directory (see Section 2.9.1, “Initializing the Data Directory”). For an RPM distribution on Linux or binary distribution on Windows, content initialization occurs as part of the MySQL installation process.
If you upgrade MySQL using a binary distribution, help table
content is not upgraded automatically, but you can upgrade it
manually. Locate the
file in the
share/mysql directory. Change location into
that directory and process the file with the
mysql client as follows:
shell> mysql -u root mysql < fill_help_tables.sql
You can also obtain the latest
fill_help_tables.sql at any time to upgrade
your help tables. Download the proper file for your version of
MySQL from http://dev.mysql.com/doc/index-other.html. After
downloading and uncompressing the file, process it with
mysql as described previously.
If you are working with Git and a MySQL development source tree,
you must use a downloaded copy of the
fill_help_tables.sql file because the source
tree contains only a “stub” version.
For a server that participates in replication, the help table content upgrade process involves multiple servers. For details, see Section 18.104.22.168, “Replication of Server-Side Help Tables”.