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When native support for tuple lookups is missing in a DB backend, it can be emulated with an EXISTS clause. This is controlled by the backend feature flag "supports_tuple_lookups". The mishandling of subquery right-hand side in `TupleIn` (added to support `CompositePrimaryKey` in Refs #373) was likely missed because the only core backend we test with the feature flag disabled (Oracle < 23.4) supports it natively. Thanks to Nandana Raol for the report, and to Sarah Boyce, Jacob Walls, and Natalia Bidart for reviews.
The documentation in this tree is in plain text files and can be viewed using any text file viewer. It uses `ReST`_ (reStructuredText), and the `Sphinx`_ documentation system. This allows it to be built into other forms for easier viewing and browsing. To create an HTML version of the docs: * Install Sphinx (using ``python -m pip install Sphinx`` or some other method). * In this docs/ directory, type ``make html`` (or ``make.bat html`` on Windows) at a shell prompt. The documentation in ``_build/html/index.html`` can then be viewed in a web browser. .. _ReST: https://docutils.sourceforge.io/rst.html .. _Sphinx: https://www.sphinx-doc.org/