common_entry_cmp period_gist_compress period_gist_consistent_internal period_gist_fetch period_gist_penalty period_gist_picksplit period_gist_same period_gist_union period_index_consistent_leaf period_index_recheck periodset_gist_compress timestampset_gist_compress

period_gist_union() Datum period_gist_union ( PG_FUNCTION_ARGS  ) GiST union method for time types.