...
$dbh->sqlite_create_function( 'compressme', 1, sub { compressor } );
$dbh->sqlite_create_function( 'uncompressme', 1, sub { uncompressor } );
...

##</code><code>##

$dbh->sqlite_create_function( 'compressme', 1, \&compressor );
$dbh->sqlite_create_function( 'uncompressme', 1, \&uncompressor );