py-sqlalchemy: updated to 1.2.1

1.2.1:

[orm] [bug] Fixed bug where an object that is expunged during a rollback of a nested or subtransaction which also had its primary key mutated would not be correctly removed from the session, causing subsequent issues in using the session.
[orm] [bug] Fixed regression where pickle format of a Load / _UnboundLoad object (e.g. loader options) changed and __setstate__() was raising an UnboundLocalError for an object received from the legacy format, even though an attempt was made to do so. tests are now added to ensure this works.
[orm] [bug] Fixed regression caused by new lazyload caching scheme in 3954 where a query that makes use of loader options with of_type would cause lazy loads of unrelated paths to fail with a TypeError.
[orm] [bug] Fixed bug in new 窶徭electin窶� relationship loader where the loader could try to load a non-existent relationship when loading a collection of polymorphic objects, where only some of the mappers include that relationship, typically when PropComparator.of_type() is being used.

sql
[sql] [bug] Fixed bug in Insert.values() where using the 窶徇ulti-values窶� format in combination with Column objects as keys rather than strings would fail. Pull request courtesy Aubrey Stark-Toller.

mssql
[mssql] [bug] Fixed regression in 1.2 where newly repaired quoting of collation names in 3785 breaks SQL Server, which explicitly does not understand a quoted collation name. Whether or not mixed-case collation names are quoted or not is now deferred down to a dialect-level decision so that each dialect can prepare these identifiers directly.

oracle
[oracle] [bug] Fixed regression where the removal of most setinputsizes rules from cx_Oracle dialect impacted the TIMESTAMP datatype窶冱 ability to retrieve fractional seconds.
[oracle] [bug] Fixed regression in Oracle imports where a missing comma caused an undefined symbol to be present. Pull request courtesy Miroslav Shubernetskiy.

misc
[bug] [ext] Fixed regression in association proxy due to 3769 (allow for chained any() / has()) where contains() against an association proxy chained in the form (o2m relationship, associationproxy(m2o relationship, m2o relationship)) would raise an error regarding the re-application of contains() on the final link of the chain.
[bug] [tests] Removed an oracle-specific requirements rule from the public test suite that was interfering with third party dialect suites.
[bug] [tests] Added a new exclusion rule group_by_complex_expression which disables tests that use 窶廨ROUP BY <expr>窶�, which seems to be not viable for at least two third party dialects.


(adam)