http://www.mail-archive.com/dbi-dev@perl.org/msg03906.html

##</code><code>##

http://www.perlmonks.org/?node_id=284436

##</code><code>##


        my ($sth, $query, $select, $from, $where, $likedate, $join, $selmin, $selmax, $min, $max, @sogs);
        $key =~ s/\'/\\\'/g;

        $select =       qq/SELECT FLOOR( MIN( n.x ) ), FLOOR( MAX( n.x ) ) /;
        $from =         qq/FROM o, n /;
        $where =                qq/WHERE MATCH( o.owner, o.mn, o.manager ) AGAINST( '+$key' IN BOOLEAN MODE ) /;
        $likedate =     qq/AND n.time LIKE '$date%' /;
        $join =         qq/AND o.key = n.key /;

        $query = $select . $from . $where . $likedate . $join;

        $sth = $dbh->prepare( $query );
        $sth->execute;

        $sth->bind_columns( $selmin, $selmax );

        while( $sth->fetch ) {
                if ( !defined( $min ) || !defined( $max ) ) {
                        $min = $selmin;
                        $max = $selmax;
                }
                $min = $selmin if $selmin < $min;
                $max = $selmax if $selmax > $max;

        }

        my $countif = "";

        for my $i ( $min .. $max ) {

                $countif .= qq/COUNT( IF( FLOOR( n.x ) = $i,1,null ) ) /;
        }

        $select =       qq/SELECT $countif /;
        $from =         qq/FROM o, n /;
        $where =                qq/WHERE MATCH( o.owner, o.mn, o.manager ) AGAINST( '+$key' IN BOOLEAN MODE ) /;
        $likedate =     qq/AND n.time LIKE '$date%' /;
        $join =         qq/o.key = n.key /;

        $query = $select . $from . $where . $likedate . $join;

        $sth = dbh->prepare( $query );
        $sth->execute;
        $sth->bind_columns( map {$_} @sogs );

        while( $sth->fetchrow_arrayref ) {
                print "$key,";

                for( 1 .. $min ) {
                        print ",";
                }

                print join( ',', @sogs ), "\n";
        }

##</code><code>##

Can't DBI::st=HASH(0x1aa7a40)->bind_col(1, undef,...), need a reference to a scalar at /usr/lib/perl5/DBI.pm line 1867, <FILE> line 56.