1.4.34

Released: March 31, 2022

orm

• [orm] [bug] [regression] Fixed regression caused by #7861 where invoking an
  Insert construct which contained ORM entities directly via
  _orm.Session.execute() would fail.

  References: #7878

postgresql

• [postgresql] [bug] Scaled back a fix made for #6581 where "executemany values" mode
  for psycopg2 were disabled for all "ON CONFLICT" styles of INSERT, to
  not apply to the "ON CONFLICT DO NOTHING" clause, which does not include
  any parameters and is safe for "executemany values" mode. "ON CONFLICT
  DO UPDATE" is still blocked from "executemany values" as there may
  be additional parameters in the DO UPDATE clause that cannot be batched
  (which is the original issue fixed by #6581).

  References: #7880