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TODO: modify the automated test suite to verify that the PR causes MariaDB to behave as intended.
Consult the documentation on ["Writing good test cases"](https://mariadb.org/get-involved/getting-started-for-developers/writing-good-test-cases-mariadb-server).
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In many cases, this will be as simple as modifying one `.test` and one `.result` file in the `mysql-test/` subdirectory.
Without automated tests, future regressions in the expected behavior can't be automatically detected and verified.
- [ ] I checked the [CODING_STANDARDS.md](https://github.com/MariaDB/server/blob/11.0/CODING_STANDARDS.md) file and my PR conforms to this where appropriate.