dbi bind_columns with an array: fail

[ag4ve]

it seems that i'm bashing heads with dbi here. i need to bind_columns to an array. now while it seems that this was never meant to happen:

http://www.mail-archive.com/[e-mail]/msg03906.html

... and there's probably a more elegant way to solve this in sql itself, i am not good enough with nested select statements to figure it out (or maybe union) and still think that i wouldn't know exactly what i'm returning - hence the array. i've tried the two methods they state here

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

with the same results. here is my (not so pretty) code:

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

        $select =       qq/SELECT FLOOR( MIN( n.x ) ), FLOOR( MAX( n.x
+ ) ) /;
        $from =         qq/FROM o, n /;
        $where =                qq/WHERE MATCH( o.owner, o.mn, o.manag
+er ) AGAINST( '+$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 /;
        $where =                qq/WHERE MATCH( o.owner, o.mn, o.manag
+er ) AGAINST( '+$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";
        }

my error, no matter how i try to return arrays is pretty much the same

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

heh, and it's quite stupid of me to redefine half of my select statement when i don't have to.....

[zwon]

I think problem is because you passing list of variables to bind_columns method, and it expects the list of references to variables, like that:

bind_columns(\$selmin, \$selmax);

[ig]

In which case $sth->bind_columns( map {\$_} @sogs ); might solve the problem?