2. compiler names changed to be less verbose, unused classes removed.
3. Methods on Dialect which return compilers, schema generators, identifier preparers
have changed to direct class references, typically on the Dialect class itself
or optionally as attributes on an individual Dialect instance if conditional behavior is needed.
This takes away the need for Dialect subclasses to know how to instantiate these
objects, and also reduces method overhead by one call for each one.
4. as a result of 3., some internal signatures have changed for things like compiler() (now statement_compiler()), preparer(), etc., mostly in that the dialect needs to be passed explicitly as the first argument (since they are just class references now). The compiler() method on Engine and Connection is now also named statement_compiler(), but as before does not take the dialect as an argument.
5. changed _process_row function on RowProxy to be a class reference, cuts out 50K method calls from insertspeed.py
and TypeDecorator classes which define convert_bind_param()/convert_result_value()
will continue to function. Also supports calling the super() version of
those methods.
of convert_bind_param() and convert_result_value() to callable-returning
bind_processor() and result_processor() methods. if no callable is
returned, no pre/post processing function is called.
- hooks added throughout base/sql/defaults to optimize the calling
of bind param/result processors so that method call overhead is minimized.
special cases added for executemany() scenarios such that unneeded "last row id"
logic doesn't kick in, parameters aren't excessively traversed.
- new performance tests show a combined mass-insert/mass-select test as having 68%
fewer function calls than the same test run against 0.3.
- general performance improvement of result set iteration is around 10-20%.
checking this state added a lot of method call overhead and there was
no decent reason to ever set it to False. Table and column names which are
all lower case will be treated as case-insenstive (yes we adjust for
Oracle's UPPERCASE style too).
that anything which is a column expression does not have a "c" or a
"columns" attribute. Also works for select().as_scalar(); _ScalarSelect
is a columnelement, so you can't say select().as_scalar().c.foo, which is
a pretty confusing mistake to make. in the case of _ScalarSelect made
an explicit raise if you try to access 'c'.
- Mark everything in a test suite as failed when setUpAll fails.
- Added test coverage for Unicode table names in metadata.reflect()
- @testing.exclude() filters out tests by server version
- Applied exclude to the test suite, MySQL 4.1 passes again (no XA or SAVEPOINT)
- Removed MySQL charset-setting pool hook- charset=utf8&use_unicode=0 works just as well. (Am I nuts? I'd swear this didn't work before.)
- Finally migrated some old MySQL-tests into the dialect test module
- Corrected 'commit' and 'rollback' logic (and comment) for ancient MySQL versions lacking transactions entirely
- Deprecated the MySQL get_version_info in favor of server_version_info
- Added a big hunk-o-doc for MySQL.
columns from a join, equating foreign keys and otherwise equated columns.
this is also mostly to help inheritance scenarios formulate the best
choice of primary key columns. [ticket:185]
- added 'bind' argument to Sequence.create()/drop(), ColumnDefault.execute()
- added support for reflection of domains [ticket:570]
- types which are missing during reflection resolve to Null type
instead of raising an error
- moved reflection/types/query unit tests specific to postgres to new
postgres unittest module
Mike Bayer