statistics_info()
$dbh->statistics_info($catalog, $database, $table,unique_only,quick)
This method is meant to return an active statement handle
that can be used to retrieve statistical information about a given
table and its indexes. It’s experimental at the time of this writing
and its syntax, results, and usage may change. The
unique_only argument may be set to 1 or 0
to indicate whether or not information only on unique indexes should
be retrieved. If quick is set to 1, then
some information is not returned unless it can be retrieved
quickly.