datum_sum_int32 ensure_same_timetype_skiplist period_agg period_agg_transfn period_extent_transfn period_tcount_transfn period_transform_tcount period_tunion_finalfn period_tunion_transfn periodset_agg_transfn periodset_extent_transfn periodset_tcount_transfn periodset_transform_tcount periodset_tunion_transfn time_agg_combinefn time_extent_combinefn time_tunion_combinefn timestamp_agg timestamp_tunion_finalfn timestampset_agg_transfn timestampset_extent_transfn timestampset_tcount_transfn timestampset_transform_tcount timestampset_tunion_transfn

period_extent_transfn() PGDLLEXPORT Datum period_extent_transfn ( PG_FUNCTION_ARGS  ) Transition function for temporal extent aggregation of period values with period bounding box.