+ my $empty = driver_name eq 'Pg' ? qq('') : qq("");
+ if ( driver_name eq 'mysql' ) {
+ $unlinked = "LEFT JOIN cust_svc ON cust_svc.svcnum = svc_acct.svcnum
+ WHERE cust_svc.pkgnum IS NULL
+ OR cust_svc.pkgnum = 0
+ OR cust_svc.pkgnum = $empty";
+ } else {
+ $unlinked = "
+ WHERE 0 <
+ ( SELECT count(*) FROM cust_svc
+ WHERE cust_svc.svcnum = svc_acct.svcnum
+ AND ( pkgnum IS NULL OR pkgnum = 0 OR pkgnum = $empty )
+ )
+ ";
+ }