period_bound_qsort_cmp period_cmp period_cmp_bounds period_cmp_internal period_constructor2 period_constructor4 period_copy period_deserialize period_duration period_duration_internal period_eq period_eq_internal period_expand period_ge period_ge_internal period_gt period_gt_internal period_in period_le period_le_internal period_lower period_lower_inc period_lt period_lt_internal period_make period_ne period_ne_internal period_out period_read period_recv period_send period_set period_shift period_shift_internal period_shift_tscale period_super_union period_to_secs period_to_string period_to_tstzrange period_upper period_upper_inc period_write periodarr_normalize timestamp_to_period tstzrange_to_period

period_duration_internal() Interval* period_duration_internal ( const Period *  p ) Returns the duration of the period (internal function)