The following lines contain the word 'select', 'insert', 'update' or 'delete':
PROCEDURE UPDATE_PERIOD(x_cec_errcode OUT NOCOPY VARCHAR2,
P_PO_RELEASE_ID IN PO_DISTRIBUTIONS.PO_RELEASE_ID%TYPE,
P_PO_HEADER_ID IN PO_DISTRIBUTIONS.PO_HEADER_ID%TYPE ) IS
BEGIN
NULL;
END UPDATE_PERIOD;