datum_sum_int32 period_tunion_finalfn period_tunion_transfn periodset_tunion_transfn time_tunion_combinefn timestamp_tunion_finalfn timestampset_tunion_transfn

time_tunion_combinefn() Datum time_tunion_combinefn ( PG_FUNCTION_ARGS  ) Combine function for union aggregate of time types.