This reverts commit e441847eca.
A shallow copy is not enough because querysets can be reused and
evaluated in nested nodes, which shouldn't mutate JOIN aliases.
Thanks Michal Čihař for the report.
Backport of 903aaa35e5 from main
Address a long standing bug in a Where.add optimization to discard
equal nodes that was surfaced by implementing equality for Lookup
instances in bbf141bcdc.
Thanks Shaheed Haque for the report.
Subquery deconstruction support required implementing complex and
expensive equality rules for sql.Query objects for little benefit as
the latter cannot themselves be made deconstructible to their reference
to model classes.
Making Expression @deconstructible and not BaseExpression allows
interested parties to conform to the "expression" API even if they are
not deconstructible as it's only a requirement for expressions allowed
in Model fields and meta options (e.g. constraints, indexes).
Thanks Phillip Cutter for the report.
This also fixes a performance regression in bbf141bcdc.
This issue started manifesting itself when nesting a combined subquery
relying on exclude() since 8593e162c9 but
sql.Query.combine never properly handled subqueries outer refs in the
first place, see QuerySetBitwiseOperationTests.test_subquery_aliases()
(refs #27149).
Thanks Raffaele Salmaso for the report.
This also replaces assertQuerysetEqual() to
assertSequenceEqual()/assertCountEqual() where appropriate.
Co-authored-by: Peter Inglesby <peter.inglesby@gmail.com>
Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>
As mentioned in the pre-existing split_exclude() docstring EXISTS is
easier to optimize for query planers and circumvents the IN (NULL)
handling issue.
On CockroachDB, primary key values stored in these fields are larger
than they accept. Fixes:
queries.test_bulk_update.BulkUpdateNoteTests.test_multiple_fields,
queries.test_bulk_update.BulkUpdateNoteTests.test_inherited_fields, and
queries.tests.RelatedLookupTypeTests.test_values_queryset_lookup.
QuerySet.alias() allows creating reusable aliases for expressions that
don't need to be selected but are used for filtering, ordering, or as
a part of complex expressions.
Thanks Simon Charette for reviews.
Thanks to Adam Johnson, Carlton Gibson, Mariusz Felisiak, and Raphael
Michel for mentoring this Google Summer of Code 2019 project and
everyone else who helped with the patch.
Special thanks to Mads Jensen, Nick Pope, and Simon Charette for
extensive reviews.
Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Mariusz Felisiak
Daniyal
Wu Haotian
abhiabhi94
Simon Charette
Hasan Ramezani
Iuri de Silvio
Jonathan Richards
Johan Schiff
starryrbs
David-Wobrock
Tim Graham
Hannes Ljungberg
Kwist
Nick Pope
Alexandr Tatarinov
Jacob Walls
Nicolas Baccelli
Laurent Tramoy
sage