primaryjoin of a relationship involved comparison to an unhashable type such as an HSTORE, lazy loads would fail due to a hash-oriented check on the statement parameters, modified in 1.0 as a result of :ticket:`3061` to use hashing and modified in :ticket:`3368` to occur in cases more common than "load on pending". The values are now checked for the ``__hash__`` attribute beforehand. fixes #3416
to protect against unknown conditions when splicing inner joins together within joined eager loads with ``innerjoin=True``; if some of the joins use a "secondary" table, the assertion needs to unwrap further joins in order to pass. fixes #3412
as failing with the new 'entity' key value added to :attr:`.Query.column_descriptions`, the logic to discover the "from" clause is again reworked to accommodate columns from aliased classes, as well as to report the correct value for the "aliased" flag in these cases. fixes #3409
where the check for query state on :meth:`.Query.update` or :meth:`.Query.delete` compared the empty tuple to itself using ``is``, which fails on Pypy to produce ``True`` in this case; this would erronously emit a warning in 0.9 and raise an exception in 1.0. fixes #3405
of ``entity`` to the :attr:`.Query.column_descriptions` accessor would fail if the target entity was produced from a core selectable such as a :class:`.Table` or :class:`.CTE` object. fixes #3403 references #3320
set to a SQL expression for an UPDATE, and the SQL expression when compared to the previous value of the attribute would produce a SQL comparison other than ``==`` or ``!=``, the exception "Boolean value of this clause is not defined" would raise. The fix ensures that the unit of work will not interpret the SQL expression in this way. fixes #3402
exprssed -> expressed
event where its invocation was moved to be after the class manager's instrumentation of the class, which is the opposite of what the documentation for the event explicitly states. The rationale for the switch was due to Declarative taking the step of setting up the full "instrumentation manager" for a class before it was mapped for the purpose of the new ``@declared_attr`` features described in :ref:`feature_3150`, but the change was also made against the classical use of :func:`.mapper` for consistency. However, SQLSoup relies upon the instrumentation event happening before any instrumentation under classical mapping. The behavior is reverted in the case of classical and declarative mapping, the latter implemented by using a simple memoization without using class manager. fixes #3388
changes made to the :class:`.Query` object's collection of entities to load within the event would render in the SQL, but would not be reflected during the loading process. fixes #3387
to transient objects with attributes unset would leak NEVER_SET, and negated_contains_or_equals would do so for any transient object as the comparison used only the committed value. Repaired the NEVER_SET cases, fixes #3371, and also made negated_contains_or_equals() use state_attr_by_column() just like a non-negated comparison, fixes #3374