Found using: https://github.com/intgr/topy

to use the ``database_principal_id()`` function in conjunction with
the ``sys.database_principals`` view so that we can determine
the default schema independently of the type of login in progress
(e.g., SQL Server, Windows, etc). fixes #3025

it for DELETE would fail to target the correct row for DELETE.
Then to compound matters, basic "number of rows matched" checks were
not being performed.  Both issues are fixed, however note that the
"rows matched" check requires so-called "sane multi-row count"
functionality; the DBAPI's executemany() method must count up the
rows matched by individual statements and SQLAlchemy's dialect must
mark this feature as supported, currently applies to some mysql dialects,
psycopg2, sqlite only. fixes #3006
- Enabled "sane multi-row count" checking for the psycopg2 DBAPI, as
this seems to be supported as of psycopg2 2.0.9.

"supports unicode statements" flag is now False, so that SQLAlchemy
will encode the *SQL string* (note: *not* the parameters)
to bytes before sending to the database.  This seems to allow
all unicode-related tests to pass for mysql-connector, including those
that use non-ascii table/column names, as well as some tests for the
TEXT type using unicode under cursor.executemany().
- other mysql-connector fixes; latest version seems to do better on
function call counts

enhancements where index reflection on Postgresql versions specific
to only the 8.1, 8.2 series again
broke, surrounding the ever problematic int2vector type.  While
int2vector supports array operations as of 8.1, apparently it only
supports CAST to a varchar as of 8.3.
fix #3000

:class:`.DateTime`.  As Oracle has no "datetime" type per se,
it instead has only ``DATE``, it is appropriate here that the
``DATE`` type as present in the Oracle dialect be an instance of
:class:`.DateTime`.  This issue doesn't change anything as far as
the behavior of the type, as data conversion is handled by the
DBAPI in any case, however the improved subclass layout will help
the use cases of inspecting types for cross-database compatibility.
Also removed uppercase ``DATETIME`` from the Oracle dialect as this
type isn't functional in that context.  fixes #2987

Update URL for pymssql

- various improvemnts to oracle docs, rewrite section on unicode, more linking,
enhance section on resolve_synonyms