ThinkSQL is a relational DBMS that supports SQL written in Pascal.
The project started in 2000. It was open-sourced in 2012.
Multi-version Concurrency Control (MVCC)
Relational
SQL
Shared-Everything
http://www.thinksql.co.uk/
https://github.com/ggaughan/ThinkSQL
https://www.thinksql.co.uk/main/documentation.html
GB
2000
Commercial, Open Source
Pascal