DBD::SQLite and column_info

How do you use column_info with DBD::SQLite?  Any set of parameters I
use result in getting back undef. All of the following commands return
undef but $DBI::err remains false:

	$info = $dbh->column_info('%', '%', '%', '%');
	$info = $dbh->column_info('%', '%', 'mytable', '%');
	$info = $dbh->column_info('%', '%', 'mytable', undef);
	$info = $dbh->column_info(undef, undef, undef, undef);

All I want is the information about "mytable".  What's the correct
syntax?

• DBD::SQLite and column_info by sam.paquin