bigintspan_expand datespan_duration datespan_set_tstzspan datespan_to_tstzspan ensure_same_span_type ensure_span_isof_basetype ensure_span_isof_type ensure_valid_span_span floatspan_ceil floatspan_degrees floatspan_expand floatspan_floor floatspan_floor_ceil_iter floatspan_radians floatspan_round floatspan_round_set floatspan_set_intspan floatspan_to_intspan intspan_expand intspan_set_floatspan intspan_to_floatspan numspan_delta_scale_iter numspan_expand numspan_shift_scale numspan_shift_scale_iter numspan_width set_set_span set_set_subspan set_span set_spans set_split_each_n_spans set_split_n_spans set_to_span span_bound_cmp span_bound_qsort_cmp span_bounds_shift_scale_time span_bounds_shift_scale_value span_cmp span_copy span_decr_bound span_deserialize span_eq span_expand span_ge span_gt span_hash span_hash_extended span_in span_incr_bound span_le span_lower_cmp span_lt span_make span_ne span_out span_set span_upper_cmp spanarr_normalize timestamptz_shift tstzspan_delta_scale_iter tstzspan_duration tstzspan_expand tstzspan_set_datespan tstzspan_shift_scale tstzspan_shift_scale1 tstzspan_to_datespan unquote value_set_span value_span

span_decr_bound() Datum span_decr_bound ( Datum  lower, meosType  basetype  ) Return the bound decreased by 1 for accounting for canonicalized spans.