This makes the docstring example code compatible with both Python 2 and Python 3.

Changed the "directed graph" example to no longer consider
integer identifiers of nodes as significant; the "higher" / "lower"
references now allow mutual edges in both directions.

Change-Id: Ibfd5b420f0451a6fc746f0bcbbbb062f8f88dc1d
Fixes: #3698
(cherry picked from commit c3de4061fd490adcd8b75c79685f4a831b869f9e)

is unnecessary and causes collisions against other CI runs

Change-Id: I47e9bc98cd6ef4ab90be25bae45897dabae16308

Fixed bug where when using ``case_sensitive=False`` with an
:class:`.Engine`, the result set would fail to correctly accomodate
for duplicate column names in the result set, causing an error
when the statement is executed in 1.0, and preventing the
"ambiguous column" exception from functioning in 1.1.

Change-Id: If582bb9fdd057e4da3ae42f7180b17d1a1a2d98e
Fixes: #3690

This is an old parameter no longer relevant to how SQLAlchemy
works, once the Query object was introduced.  By deprecating it
we establish that we aren't supporting non-working use cases
and that we encourage applications to move off of the use of this
parameter.

Fixes: #3394
Change-Id: I25b9a38142a1537bbcb27d3e8b66a8b265140072

To be more descriptive of the use of _mapper_zero(), rename
it to _entity_zero(), but also supply a new _mapper_zero() function
that more strictly returns a mapper.  The existing
_entity_zero() function is renamed to _query_entity_zero.
_only_mapper_zero() is removed as it isn't used.  Divide up the
existing calling functions to refer to the appropriate new method.

Change-Id: I8780c3235e87b4936c6daf64d9d299b22b6e1260
Fixes: #3608

Fixes: #3512
Co-Authored-By: Mike Bayer <mike_mp@zzzcomputing.com>
Change-Id: Ibd126c50eda621e2f4120ee378f7313af2d7ec3c
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/193

Keystone and others depend on the .property attribute being
"mirrored" when a @hybrid_property is linked directly to a
mapped attribute.  Restore this linkage and also create a defined
behavior for the .info dictionary; it is that of the hybrid itself.
Add this behavioral change to the migration notes.

Change-Id: I8ac34ef52039387230c648866c5ca15d381f7fee
References: #3653