The following parameters are available :
<dl>
<dt><b>Field</b>
<dd>The field these permissions should apply to. <p>
<dt><b>Username</b>
<dd>The user to whom the permissions are granted. This user must already
    exist in the <tt>User Permissions</tt> table. <p>
<dt><b>Hosts</b>
<dd>The hosts that the user can access the table from. <p>
<dt><b>Permissions</b>
<dd>The permissions granted to the user on the chosen column of the table. <p>
</dl>