SELECT
  Task_wa.taskID,
  Task_wa.reservedBy,
  Task_wa.subject,
  Task_wa.dueDateTime,
  Task_wa.priority,
  Task_wa.status,
  Task_wa.versionNo
INTO
  :taskID,
  :reservedBy,
  :subject,
  :dueDateTime,
  :priority,
  :status,
  :versionNo 
FROM
  Task_wa,
  TaskLink 
WHERE 
  (
    TaskLink.linkedID = :linkedID 
  ) 
  AND 
  (
    TaskLink.linkType = :linkType 
  ) 
  AND 
  (
    TaskLink.taskID = Task_wa.taskID 
  ) 
  AND 
  (
    
    (
      Task_wa.status <> :taskStatus 
    ) 
    OR 
    (
      :taskStatus IS NULL 
    ) 
  ) 
ORDER BY Task_wa.taskID