- 'EXISTS ( SELECT 1 FROM cust_main_invoice
- WHERE cust_main_invoice.custnum = cust_main.custnum
- AND length(dest) > 5
- )' # AND dest LIKE '%@%'
+ 'EXISTS ( SELECT 1 FROM contact_email
+ JOIN cust_contact USING (contactnum)
+ WHERE cust_contact.custnum = cust_main.custnum
+ )'