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Simon Charette 9cb8baa0c4 Fixed #35559 -- Avoided unnecessary query on sliced union of empty queries.
While refs #34125 focused on the SQL correctness of slicing of union of
potentially empty queries it missed an optimization opportunity to avoid
performing a query at all when all queries are empty.

Thanks Lucidiot for the report.
2024-07-19 08:54:47 +02:00
..
2024-01-26 12:45:07 +01:00

To run the test suite, first, create and activate a virtual environment. Then
install some requirements and run the tests::

    $ cd tests
    $ python -m pip install -e ..
    $ python -m pip install -r requirements/py3.txt
    $ ./runtests.py

For more information about the test suite, see
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/.