INNER JOIN civicrm_relationship_type ON civicrm_relationship.relationship_type_id = civicrm_relationship_type.id
INNER JOIN civicrm_contact ON civicrm_relationship.contact_id_b = civicrm_contact.id
LEFT JOIN civicrm_phone ON (civicrm_phone.contact_id = civicrm_contact.id AND civicrm_phone.is_primary = 1)
- LEFT JOIN civicrm_email ON (civicrm_email.contact_id = civicrm_contact.id )
+ LEFT JOIN civicrm_email ON (civicrm_email.contact_id = civicrm_contact.id AND civicrm_email.is_primary = 1)
WHERE civicrm_relationship.contact_id_a = %1 AND civicrm_relationship.case_id = %2';
$params = array(