Prosedur tersimpan Postgresql mengembalikan tabel semua kolom

Jika Anda ingin mengembalikan hasil, Anda perlu menggunakan return query di PL/pgSQL seperti yang didokumentasikan dalam manual

CREATE OR REPLACE FUNCTION dwgcould.returnallcolumns(IN sessionId character varying)
  RETURNS SETOF public.mytable AS
$BODY$
BEGIN
  return query --<< this was missing
    SELECT * 
    FROM public.mytable 
    WHERE session_id = returnallcolumns.sessionId 
    ORDER BY pro_id DESC LIMIT 1;
END;
$BODY$
LANGUAGE plpgsql VOLATILE;

Tetapi Anda tidak memerlukan PL/pgSQL untuk ini, fungsi SQL sederhana akan lebih efisien:

CREATE OR REPLACE FUNCTION dwgcould.returnallcolumns(IN sessionId character varying)
  RETURNS SETOF public.mytable AS
$BODY$
    SELECT * 
    FROM public.mytable 
    WHERE session_id = returnallcolumns.sessionId 
    ORDER BY pro_id DESC LIMIT 1;
$BODY$
LANGUAGE sql;