datum_sum_int32 period_tunion_finalfn period_tunion_transfn periodset_tunion_transfn time_tunion_combinefn timestamp_tunion_finalfn timestampset_tunion_transfn

timestamp_tunion_finalfn() Datum timestamp_tunion_finalfn ( PG_FUNCTION_ARGS  ) Final function for union aggregation of timestamp set values.