such that they are matched to the received result set positionally, rather than by name. Originally, this was seen as a way to handle cases where we had columns returned with difficult-to-predict names, though in modern use that issue has been overcome by anonymous labeling. In this version, the approach basically reduces function call count per-result by a few dozen calls, or more for larger sets of result columns. The approach still degrades into a modern version of the old approach if textual elements modify the result map, or if any discrepancy in size exists between the compiled set of columns versus what was received, so there's no issue for partially or fully textual compilation scenarios where these lists might not line up. fixes #918 - callcounts still need to be adjusted down for this so zoomark tests won't pass at the moment
pullreq github:132
a much more modest outcome than what we started with. The work of create_row_processor() for ColumnProperty objects is essentially done at query setup time combined with some lookups in _instance_processor(). - to allow this change for deferred columns, deferred columns no longer search for themselves in the result. If they've been set up as deferred without any explicit directive to undefer them, then this is what was asked for. if we don't do this, then we're stuck with this performance penalty for all deferred columns which in the vast majority of typical use cases (e.g. loading large, legacy tables or tables with many/large very seldom used values) won't be present in the result and won't be accessed at all.
typo fix: indivdual -> individual.
many-to-one ``!= None`` would fail if the source were an aliased class, or if the query needed to apply special aliasing to the expression due to aliased joins or polymorphic querying; also fixed bug in the case where comparing a many-to-one to an object state would fail if the query needed to apply special aliasing due to aliased joins or polymorphic querying. fixes #3310
an ``after_rollback()`` handler for a :class:`.Session` incorrectly adds state to that :class:`.Session` within the handler, and the task to warn and remove this state (established by :ticket:`2389`) attempts to proceed. fixes #3309
in callcounts specific to the "expiration" of objects, as in the "auto expire" feature of :meth:`.Session.commit` and for :meth:`.Session.expire_all`, as well as in the "cleanup" step which occurs when object states are garbage collected. fixes #3307
as :class:`.TypeDecorator` objects.
dialect on a type where MySQL does not support CAST; MySQL only supports CAST on a subset of datatypes. SQLAlchemy has for a long time just omitted the CAST for unsupported types in the case of MySQL. While we don't want to change this now, we emit a warning to show that it's taken place. A warning is also emitted when a CAST is used with an older MySQL version (< 4) that doesn't support CAST at all, it's skipped in this case as well. fixes #3237