datum_sum_int32 ensure_same_timetype_skiplist period_tagg period_tagg_transfn periodset_tagg_transfn time_tagg_combinefn timestamp_tagg tstzset_tagg_transfn

periodset_tagg_transfn() SkipList * periodset_tagg_transfn ( SkipList *  state, const SpanSet *  ps  )