my $dbh = C4::Context->dbh;
my $query = qq/
- SELECT IFNULL(owner,0) AS owner, category, allow_add, allow_delete_own, allow_delete_other, IFNULL(sh.borrowernumber,0) AS borrowernumber
+ SELECT COALESCE(owner,0) AS owner, category, allow_add, allow_delete_own, allow_delete_other, COALESCE(sh.borrowernumber,0) AS borrowernumber
FROM virtualshelves vs
LEFT JOIN virtualshelfshares sh ON sh.shelfnumber=vs.shelfnumber
AND sh.borrowernumber=?