maybe this was planned differently at some point but
session.execute() only autoflushes for ORM contexts.

Change-Id: Ia10af232248e321875f79d5bde71f64d3dc25177
References: #9776
(cherry picked from commit eb286c15f096771dbb128acbe8fe03e94aa72f6a)

Fixes: #9761
Change-Id: I555e822b092d047badab86b3a365380121968592
(cherry picked from commit 987285fb4b13c39bcc6b8922e618d9e830577dda)

Change-Id: Icc8f201d63e4cc2e7df2f42acb28a6dc84a58342
(cherry picked from commit 623044bb54a58eaa25ed239b7646396548f4b1e7)

Fixed critical caching issue where combination of :func:`_orm.aliased()`
:func:`_sql.case` and :func:`_hybrid.hybrid_property` expressions would
cause a cache key mismatch, leading to cache keys that held onto the actual
:func:`_orm.aliased` object while also not matching each other, filling up
the cache.

Fixes: #9728
Change-Id: I700645b5629a81a0104cf923db72a7421fa43ff4
(cherry picked from commit 4d69d83530666f9aaf3fb327d8c63110ef5e7ff5)

Fixed bug where various ORM-specific getters such as
:attr:`.ORMExecuteState.is_column_load`,
:attr:`.ORMExecuteState.is_relationship_load`,
:attr:`.ORMExecuteState.loader_strategy_path` etc. would throw an
``AttributeError`` if the SQL statement itself were a "compound select"
such as a UNION.

Fixes: #9634
Change-Id: Ia37df5d6f89d6534d69237dcab294bd849ece28b
(cherry picked from commit 89608ccd3f5e5796d578e9a39201f7c5c45a61fe)

Fixed endless loop which could occur when using "relationship to aliased
class" feature and also indicating a recursive eager loader such as
``lazy="selectinload"`` in the loader, in combination with another eager
loader on the opposite side. The check for cycles has been fixed to include
aliased class relationships.

Fixes: #9590
Change-Id: I8d340882f040ff9289c209bedd8fbdfd7186f944
(cherry picked from commit e79ab08165e01dc7af50fcffadb31468ace51b6c)

a new user spent many days misled by this paragraph thinking
they were required to use reflection for an existing database.

Change-Id: I4c6757b931481db7a8d4202334382143e1491935
(cherry picked from commit 42b3b80fae8d7b808125efc1dd9a900231c2ed21)