CREATE OR REPLACE FUNCTION public.search_exportlog(search text)
 RETURNS SETOF exportlog
 LANGUAGE plpgsql
 STABLE
AS $function$ BEGIN IF search = '' THEN RETURN query
SELECT
  *
FROM
  exportlog e;
  ELSE RETURN query
SELECT
  e.*
FROM
  exportlog e
  LEFT JOIN jobs j on j.id = e.jobid
LEFT JOIN payments p 
    ON p.id = e.paymentid
LEFT JOIN bills b
    ON e.billid = b.id
WHERE
  (
    j.ro_number ILIKE '%' || search 
    OR b.invoice_number ILIKE '%' || search 
    OR p.paymentnum ILIKE '%' || search 
    OR e.useremail ILIKE '%' || search 
  )
  AND (e.jobid = j.id
  or e.paymentid = p.id
 or e.billid = b.id)
;
END IF;
END $function$;