delta/python-packages/sqlalchemy.git/doc, branch pr/250

Fix typo

2016-03-16T03:30:04+00:00

- Added basic isolation level support to the SQL Server dialects

2016-03-15T21:47:34+00:00

via :paramref:`.create_engine.isolation_level` and
:paramref:`.Connection.execution_options.isolation_level`
parameters.  fixes #3534

- changelog and docs for #3332, fixes #3332

2016-03-15T21:17:21+00:00

- make docs for isolation level more consistent between postgresql
and mysql
- move mysql autocommit tests

- Fixed bug where a newly inserted instance that is rolled back

2016-03-14T21:56:57+00:00

would still potentially cause persistence conflicts on the next
transaction, because the instance would not be checked that it
was expired.   This fix will resolve a large class of cases that
erronously cause the "New instance with identity X conflicts with
persistent instance Y" error.
fixes #3677

Update cascades.rst

2016-03-09T07:56:30+00:00

- changelog for #3666, fixes #3666

2016-03-03T01:13:42+00:00

- Anonymous labeling is applied to a :attr:`.func` construct that is

2016-02-26T05:20:39+00:00

passed to :func:`.column_property`, so that if the same attribute
is referred to as a column expression twice the names are de-duped,
thus avoiding "ambiguous column" errors.   Previously, the
``.label(None)`` would need to be applied in order for the name
to be de-anonymized.
fixes #3663

- An improvement to the workings of :meth:`.Query.correlate` such

2016-02-26T04:27:49+00:00

that when a "polymorphic" entity is used which represents a straight
join of several tables, the statement will ensure that all the
tables within the join are part of what's correlating.
fixes #3662

- Fixed bug in "to_list" conversion where a single bytes object

2016-02-22T01:52:43+00:00

would be turned into a list of individual characters.  This would
impact among other things using the :meth:`.Query.get` method
on a primary key that's a bytes object.
fixes #3660

- reworked the way the "select_wraps_for" expression is

2016-02-21T01:22:38+00:00

handled within visit_select(); this attribute was added in the
1.0 series to accommodate the subquery wrapping behavior of
SQL Server and Oracle while also working with positional
column targeting and no longer relying upon "key fallback"
in order to target columns in such a statement.  The IBM DB2
third-party dialect also has this use case, but its implementation
is using regular expressions to rewrite the textual SELECT only
and does not make use of a "wrapped" select at this time.
The logic no longer attempts to reconcile proxy set collections as
this was not deterministic, and instead assumes that the select()
and the wrapper select() match their columns postionally,
at least for the column positions they have in common,
so it is now very simple and safe.  fixes #3657.
- as a side effect of #3657 it was also revealed that the
strategy of calling upon a ResultProxy._getter was not
correctly calling into NoSuchColumnError when an expected
column was not present, and instead returned None up to
loading.instances() to produce NoneType failures; added
a raiseerr argument to _getter() which is called when we
aren't expecting None, fixes #3658.