Fixed two closely related bugs involving the mapper eager_defaults
flag in conjunction with single-table inheritance; one where the
eager defaults logic would inadvertently try to access a column
that's part of the mapper's "exclude_properties" list (used by
Declarative with single table inheritance) during the eager defaults
fetch, and the other where the full load of the row in order to
fetch the defaults would fail to use the correct inheriting mapper.
Fixes: #3908
Change-Id: Ie745174c917d512e2c46d9e3cc14512cde53cc9a
Fixed a major inefficiency in the "eager_defaults" feature whereby
an unnecessary SELECT would be emitted for column values where the
ORM had explicitly inserted NULL, corresponding to attributes that
were unset on the object but did not have any server default
specified, as well as expired attributes on update that nevertheless
had no server onupdate set up. As these columns are not part of the
RETURNING that eager_defaults tries to use, they should not be
post-SELECTed either.
Change-Id: I0d4f1e9d3d9717d68dcc0592f69456a1f1c36df8
Fixes: #3909
Fixed bug whereby the :meth:`.DDLEvents.column_reflect` event would not
allow a non-textual expression to be passed as the value of the
"default" for the new column, such as a :class:`.FetchedValue`
object to indicate a generic triggered default or a
:func:`.sql.expression.text` construct. Clarified the documentation
in this regard as well.
Fixes: #3905
Change-Id: I829796c3e9f87f375149bebee7eef133a6876d4d
Fixed bug where the "automatic exclude" feature of declarative that
ensures a column local to a single table inheritance subclass does
not appear as an attribute on other derivations of the base would
not take effect for multiple levels of subclassing from the base.
Change-Id: Ibf67b631b4870dd1bd159f7d6085549d299fffe0
Fixes: #3895
Fixed bug in new :mod:`sqlalchemy.ext.indexable` extension
where setting of a property that itself refers to another property
would fail.
Fixes: #3901
Change-Id: I203a66117e2399afee11a34f43f0e93adfc6d571
Fixed bug in Postgresql :class:`.ExcludeConstraint` where the
"whereclause" and "using" parameters would not be copied during an
operation like :meth:`.Table.tometadata`.
Change-Id: I2f704981d4d4862f9c82a50272006fab8becebb6
Fixes: #3900
Added a version check to the "get_isolation_level" feature, which is
invoked upon first connect, so that it skips for SQL Server version
2000, as the necessary system view is not available prior to SQL Server
2005.
Change-Id: If4f860513f0aae6625803f449714aedfc5075f57
Fixes: #3898
Include the metadata argument for the Sequence
and explain the rationale. Correct inconsistencies
between Core / ORM examples and update language
regarding client side vs. server side Sequence
directive.
Co-authored-by: Stéphane Raimbault <stephane.raimbault@gmail.com>
Change-Id: I65c522acf9bdf25041a5baf2e10be41f0927999a
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/341
Fixed bug first introduced in 0.9.7 as a result of 🎫`3106`
which would cause an incorrect query in some forms of multi-level
subqueryload against aliased entities, with an unnecessary extra
FROM entity in the innermost subquery.
Fixes: #3893
Change-Id: Ic4003c2c1c0206bd22a098fd497a7375c2758305
The MySQL dialect now will not warn when a reflected column has a
"COMMENT" keyword on it, but note however the comment is not yet
reflected; this is on the roadmap for a future release. Pull request
courtesy Lele Long.
Fixes: #3867
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/324
Change-Id: I869e29aba6766d0eda1e59af09a3e8e3748a3942
Added a new parameter ``mysql_prefix`` supported by the :class:`.Index`
construct, allows specification of MySQL-specific prefixes such as
"FULLTEXT". Pull request courtesy Joseph Schorr.
Change-Id: I5a21fa466fdfd4d9e39e1fb4ecec1eab93b92c36
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/339
Avoid putting engine password in the exception message in
`MetaData.reflect` (since exception messages often appear in logs).
Use the same redacted `__repr__` implementation in
`TLEngine` as in its base class `Engine`
Change-Id: Ic0a7baea917a9c8d87dffdd82ef566673ab08e02
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/327
Mike Bayer