Unless the NONTEMPORAL qualifier is specified, updates on temporal tables are always current in the transaction-time dimension.
All check, primary key, and temporal unique (current, sequenced, nonsequenced) constraints defined on the table are checked only on rows that are open in transaction time.
DML operations on tables defined with NORMALIZE produce a normalized set of modified rows. Some unmodified rows may be deleted from the target table as a result of the normalization.
When the target table is a normalized temporal table with transaction time, rows that are deleted as a result of the normalization are closed in transaction time.