On 13/09/2019 17:19, Paul Jungwirth wrote: > The SQL:2011 standard also has temporal primary keys, foreign keys, > SELECTs, and UPDATE/DELETEs, and we're working on adding those too. And here is a full implementation of all that: https://github.com/xocolatl/periods/ It is packaged in both the deb and rpm repositories for PGDG.