1.2.17

Released: January 25, 2019

• [feature] [orm] Added new event hooks QueryEvents.before_compile_update() and
  QueryEvents.before_compile_delete() which complement
  QueryEvents.before_compile() in the case of the Query.update()
  and Query.delete() methods.

  References: #4461

• [bug] [postgresql] Revised the query used when reflecting CHECK constraints to make use of the
  pg_get_constraintdef function, as the consrc column is being
  deprecated in PG 12. Thanks to John A Stevenson for the tip.

  References: #4463

• [bug] [orm] Fixed issue where when using single-table inheritance in conjunction with a
  joined inheritance hierarchy that uses "with polymorphic" loading, the
  "single table criteria" for that single-table entity could get confused for
  that of other entities from the same hierarchy used in the same query.The
  adaption of the "single table criteria" is made more specific to the target
  entity to avoid it accidentally getting adapted to other tables in the
  query.

  References: #4454

• [bug] [oracle] Fixed regression in integer precision logic due to the refactor of the
  cx_Oracle dialect in 1.2. We now no longer apply the cx_Oracle.NATIVE_INT
  type to result columns sending integer values (detected as positive
  precision with scale ==0) which encounters integer overflow issues with
  values that go beyond the 32 bit boundary. Instead, the output variable
  is left untyped so that cx_Oracle can choose the best option.

  References: #4457