SQLAlchemy 0.7.9 is released. This is a maintenance release primarily containing bug fixes applied to both the 0.7 and 0.8 SQLAlchemy series.
0.7.9 includes some adjustments that will also be present in 0.8, including changes to the event-dispatch system which dramatically reduce the amount of memory used. There are also several fixes related to the relatively new common table expression (CTE) construct. Other fixes include small bugs present in components such as the ORM, SQL generation system, and various dialect-specific bugs. 0.7.9 also has updates to its unit test system which were backported from 0.8. The 0.8 series, which includes a long list of new features and improvements, is more or less ready for initial beta releases, and will be available for download within the coming weeks. Download SQLAlchemy 0.7.9 at: http://www.sqlalchemy.org/download.html 0.7.9 ===== - orm - [bug] Fixed bug mostly local to new AbstractConcreteBase helper where the "type" attribute from the superclass would not be overridden on the subclass to produce the "reserved for base" error message, instead placing a do-nothing attribute there. This was inconsistent vs. using ConcreteBase as well as all the behavior of classical concrete mappings, where the "type" column from the polymorphic base would be explicitly disabled on subclasses, unless overridden explicitly. - [bug] A warning is emitted when lazy='dynamic' is combined with uselist=False. This is an exception raise in 0.8. - [bug] Fixed bug whereby user error in related-object assignment could cause recursion overflow if the assignment triggered a backref of the same name as a bi-directional attribute on the incorrect class to the same target. An informative error is raised now. - [bug] Fixed bug where incorrect type information would be passed when the ORM would bind the "version" column, when using the "version" feature. Tests courtesy Daniel Miller. [ticket:2539] - [bug] Extra logic has been added to the "flush" that occurs within Session.commit(), such that the extra state added by an after_flush() or after_flush_postexec() hook is also flushed in a subsequent flush, before the "commit" completes. Subsequent calls to flush() will continue until the after_flush hooks stop adding new state. An "overflow" counter of 100 is also in place, in the event of a broken after_flush() hook adding new content each time. [ticket:2566] - sql - [bug] Fixed the DropIndex construct to support an Index associated with a Table in a remote schema. [ticket:2571] - [bug] Fixed bug in over() construct whereby passing an empty list for either partition_by or order_by, as opposed to None, would fail to generate correctly. Courtesy Gunnlaugur Þór Briem. [ticket:2574] - [bug] Fixed CTE bug whereby positional bound parameters present in the CTEs themselves would corrupt the overall ordering of bound parameters. This primarily affected SQL Server as the platform with positional binds + CTE support. [ticket:2521] - [bug] Fixed more un-intuitivenesses in CTEs which prevented referring to a CTE in a union of itself without it being aliased. CTEs now render uniquely on name, rendering the outermost CTE of a given name only - all other references are rendered just as the name. This even includes other CTE/SELECTs that refer to different versions of the same CTE object, such as a SELECT or a UNION ALL of that SELECT. We are somewhat loosening the usual link between object identity and lexical identity in this case. A true name conflict between two unrelated CTEs now raises an error. - [bug] quoting is applied to the column names inside the WITH RECURSIVE clause of a common table expression according to the quoting rules for the originating Column. [ticket:2512] - [bug] Fixed regression introduced in 0.7.6 whereby the FROM list of a SELECT statement could be incorrect in certain "clone+replace" scenarios. [ticket:2518] - [bug] Fixed bug whereby usage of a UNION or similar inside of an embedded subquery would interfere with result-column targeting, in the case that a result-column had the same ultimate name as a name inside the embedded UNION. [ticket:2552] - [bug] Fixed a regression since 0.6 regarding result-row targeting. It should be possible to use a select() statement with string based columns in it, that is select(['id', 'name']).select_from('mytable'), and have this statement be targetable by Column objects with those names; this is the mechanism by which query(MyClass).from_statement(some_statement) works. At some point the specific case of using select(['id']), which is equivalent to select([literal_column('id')]), stopped working here, so this has been re-instated and of course tested. [ticket:2558] - [bug] Added missing operators is_(), isnot() to the ColumnOperators base, so that these long-available operators are present as methods like all the other operators. [ticket:2544] - engine - [bug] Fixed bug whereby a disconnect detect + dispose that occurs when the QueuePool has threads waiting for connections would leave those threads waiting for the duration of the timeout on the old pool (or indefinitely if timeout was disabled). The fix now notifies those waiters with a special exception case and has them move onto the new pool. [ticket:2522] - [feature] Dramatic improvement in memory usage of the event system; instance-level collections are no longer created for a particular type of event until instance-level listeners are established for that event. [ticket:2516] - [bug] Added gaerdbms import to mysql/__init__.py, the absense of which was preventing the new GAE dialect from being loaded. [ticket:2529] - [bug] Fixed cextension bug whereby the "ambiguous column error" would fail to function properly if the given index were a Column object and not a string. Note there are still some column-targeting issues here which are fixed in 0.8. [ticket:2553] - [bug] Fixed the repr() of Enum to include the "name" and "native_enum" flags. Helps Alembic autogenerate. - sqlite - [bug] Adjusted a very old bugfix which attempted to work around a SQLite issue that itself was "fixed" as of sqlite 3.6.14, regarding quotes surrounding a table name when using the "foreign_key_list" pragma. The fix has been adjusted to not interfere with quotes that are *actually in the name* of a column or table, to as much a degree as possible; sqlite still doesn't return the correct result for foreign_key_list() if the target table actually has quotes surrounding its name, as *part* of its name (i.e. """mytable"""). [ticket:2568] - [bug] Adjusted column default reflection code to convert non-string values to string, to accommodate old SQLite versions that don't deliver default info as a string. [ticket:2265] - [feature] Added support for the localtimestamp() SQL function implemented in SQLite, courtesy Richard Mitchell. - postgresql - [bug] Columns in reflected primary key constraint are now returned in the order in which the constraint itself defines them, rather than how the table orders them. Courtesy Gunnlaugur Þór Briem. [ticket:2531]. - [bug] Added 'terminating connection' to the list of messages we use to detect a disconnect with PG, which appears to be present in some versions when the server is restarted. [ticket:2570] - mysql - [bug] Updated mysqlconnector interface to use updated "client flag" and "charset" APIs, courtesy David McNelis. - mssql - [bug] Fixed compiler bug whereby using a correlated subquery within an ORDER BY would fail to render correctly if the stament also used LIMIT/OFFSET, due to mis-rendering within the ROW_NUMBER() OVER clause. Fix courtesy sayap [ticket:2538] - [bug] Fixed compiler bug whereby a given select() would be modified if it had an "offset" attribute, causing the construct to not compile correctly a second time. [ticket:2545] - [bug] Fixed bug where reflection of primary key constraint would double up columns if the same constraint/table existed in multiple schemas. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. 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