bigint_extent_transfn bigintset_agg_transfn float_extent_transfn floatset_agg_transfn int_extent_transfn intset_agg_transfn period_tcount_transfn period_tunion_finalfn period_tunion_transfn periodset_tcount_transfn periodset_tunion_transfn set_extent_transfn span_extent_transfn spanbase_extent_transfn spanset_extent_transfn textset_agg_transfn timestamp_extent_transfn timestamp_tcount_transfn timestamp_tunion_finalfn timestamp_tunion_transfn tstzset_agg_transfn tstzset_tcount_transfn tstzset_tunion_transfn

span_extent_transfn() Span * span_extent_transfn ( Span *  s1, const Span *  s2  ) Transition function for extent aggregate of span values.