:class:`.CheckConstraint` would apply itself back to the
original table during a :meth:`.Table.tometadata` operation, as
it would parse the SQL expression for a parent table. The
operation now copies the given expression to correspond to the
new table.
[ticket:2633]
without passing the "for_update=True" flag would apply the default
object to the server_default, blowing away whatever was there.
The explicit for_update=True argument shouldn't be needed with this usage
(especially since the documentation shows an example without it being
used) so it is now arranged internally using a copy of the given default
object, if the flag isn't set to what corresponds to that argument.
Also in 0.7.10. [ticket:2631]
- update "not supported" messages for empty inserts, mutlivalue inserts
- rework the ValuesBase approach for multiple value sets so that stmt.parameters
does store a list for multiple values; the _has_multiple_parameters flag now indicates
which of the two modes the statement is within. it now raises exceptions if a subsequent
call to values() attempts to call a ValuesBase with one mode in the style of the other
mode; that is, you can't switch a single- or multi- valued ValuesBase to the other mode,
and also if a multiple value is passed simultaneously with a kwargs set.
Added tests for these error conditions
- Calling values() multiple times in multivalue mode now extends the parameter list to
include the new parameter sets.
- add error/test if multiple *args were passed to ValuesBase.values()
- rework the compiler approach for multivalue inserts, back to where
_get_colparams() returns the same list of (column, value) as before, thereby
maintaining the identical number of append() and other calls when multivalue
is not enabled. In the case of multivalue, it makes a last-minute switch to return
a list of lists instead of the single list. As it constructs the additional lists, the inline
defaults and other calculated default parameters of the first parameter
set are copied into the newly generated lists so that these features continue
to function for a multivalue insert. Multivalue inserts now add no additional
function calls to the compilation for regular insert constructs.
- parameter lists for multivalue inserts now includes an integer index for all
parameter sets.
- add detailed documentation for ValuesBase.values(), including careful wording
to describe the difference between multiple values and an executemany() call.
- add a test for multivalue insert + returning - it works !
- remove the very old/never used "postgresql_returning"/"firebird_returning" flags.
Some databases support this syntax for inserts:
INSERT INTO table (id, name) VALUES
('v1', 'v2'),
('v3', 'v4');
which greatly increases INSERT speed.
It is now possible to pass a list of lists/tuples/dictionaries as
the values param to the Insert construct. We convert it to a flat
dictionary so we can continue using bind params. The above query
will be converted to:
INSERT INTO table (id, name) VALUES
(:id, :name),
(:id0, :name0);
Currently only supported on postgresql, mysql and sqlite.
that "lowercase" is the case insensitive casing, we can't distinguish between case insensitive/not
on a database that returns case-insensitive names as UPPERCASE, for names that are UPPERCASE.
[ticket:2615]
:class:`.ColumnElement` would go into an endless loop, if
:meth:`.ColumnOperators.__getitem__` were implemented.
A new NotImplementedError is emitted via ``__iter__()``.
in conjunction with "schema" for the owning
Table would fail to locate result rows due
to the MSSQL dialect's "schema rendering"
logic's failure to take .key into account.
Also in 0.7.10. [ticket:2607]
could be lost if the statement were used as a subquery
inside of another statement, as well as other similar
situations. Among other things, would cause
typing information to be lost when the Oracle/mssql dialects
would apply limit/offset wrappings. [ticket:2603]
actually run the test
- add requirements for date/datetime/time capabilities
- remove test/sql/test_types->DateTest and create new tests in suite/test_types
- move the StringTest with the "no length create" test to the suite, though this is a
weird test
used when producing a "proxy" of the column against
a selectable. This probably didn't occur in 0.7
since 0.7 doesn't respect the ".key" in a wider
range of scenarios. [ticket:2597]
:meth:`.Compiler.process` wouldn't get propagated
to the column expressions present in the columns
clause of a SELECT statement. In particular this would
come up when used by custom compilation schemes that
relied upon special flags. [ticket:2593]
by proxy that of :class:`.orm.Query`, will not
take effect for a SELECT statement that is being
rendered directly in the FROM list of the enclosing
SELECT. Correlation in SQL only applies to column
expressions such as those in the WHERE, ORDER BY,
columns clause. [ticket:2595]
that works in terms of the "impl" type by default.
This is a behavioral change for those TypeDecorator
classes that specify a custom __init__ method; those
types will need to re-define __repr__() if they need
__repr__() to provide a faithful constructor representation.
[ticket:2594]
"tuple" rows that contain
types which aren't hashable, by setting the flag
"hashable=False" on the corresponding TypeEngine object
in use. Custom types that return unhashable types
(typically lists) can set this flag to False.
[ticket:2592]
- [bug] Applying a column expression to a select
statement using a label with or without other
modifying constructs will no longer "target" that
expression to the underlying Column; this affects
ORM operations that rely upon Column targeting
in order to retrieve results. That is, a query
like query(User.id, User.id.label('foo')) will now
track the value of each "User.id" expression separately
instead of munging them together. It is not expected
that any users will be impacted by this; however,
a usage that uses select() in conjunction with
query.from_statement() and attempts to load fully
composed ORM entities may not function as expected
if the select() named Column objects with arbitrary
.label() names, as these will no longer target to
the Column objects mapped by that entity.
[ticket:2591]
to help with generative building. Also slight adjustment
regarding how SS "correlates" columns; the new methodology
no longer applies meaning to the underlying
Table column being selected. This improves
some fairly esoteric situations, and the logic
that was there didn't seem to have any purpose.
- [feature] Some support for auto-rendering of a
relationship join condition based on the mapped
attribute, with usage of core SQL constructs.
E.g. select([SomeClass]).where(SomeClass.somerelationship)
would render SELECT from "someclass" and use the
primaryjoin of "somerelationship" as the WHERE
clause. This changes the previous meaning
of "SomeClass.somerelationship" when used in a
core SQL context; previously, it would "resolve"
to the parent selectable, which wasn't generally
useful. Related to [ticket:2245].
String types. When present, renders as
COLLATE <collation>. This to support the
COLLATE keyword now supported by several
databases including MySQL, SQLite, and Postgresql.
[ticket:2276]
- [change] The Text() type renders the length
given to it, if a length was specified.
- don't hardwire "subqueries" requirement in the base, mysql < 4.1 isn't working anyway
- don't need explicit FB/PG exclusions in test_returning
- hit db.connect() for the returning requirement
passing an empty list for either partition_by
or order_by, as opposed to None, would fail
to generate correctly.
Courtesy Gunnlaugur Por Briem.
[ticket:2574]
become an externally usable package but still remains within the main sqlalchemy parent package.
in this system, we use kind of an ugly hack to get the noseplugin imported outside of the
"sqlalchemy" package, while still making it available within sqlalchemy for usage by
third party libraries.
- bootstrap and lib move to all absolute imports
- testing.py is no longer internally referenced.
- requirements move to be a pluggable class which can
be overridden.
- cleanup
in the interests of third party testing, test/lib and test/bootstrap
may move to be an independent package.
- add some failure cases
- [bug] Firebird now uses strict "ansi bind rules"
so that bound parameters don't render in the
columns clause of a statement - they render
literally instead.
- [bug] Support for passing datetime as date when
using the DateTime type with Firebird; other
dialects support this.
is replaced, such as via extend_existing,
the "auto increment" column used by insert()
constructs is reset. Previously it would
remain referring to the previous primary
key column. [ticket:2525]
"concat" and "match" operators to be the same as
that of "is", "like", and others; this helps with
parenthesization rendering when used in conjunction
with "IS". [ticket:2564]
will now be produced via the func.* accessor
as well, as users naturally try to access these
names from func.* they might as well do
what's expected, even though the returned
object is not a FunctionElement.
[ticket:2562]
CREATE TABLE that provides access to the render for each
Column individually, by constructing a @compiles
function against the new schema.CreateColumn
construct. [ticket:2463]
Mike Bayer