This is similar to Zone Maps in Netezza. https://www.ibm.com/docs/en/psfa/7.2.1?topic=statistics-zone-maps https://www.ibm.com/docs/en/psfa/7.2.1?topic=statisti

This is similar to Zone Maps in Netezza. https://www.ibm.com/docs/en/psfa/7.2.1?topic=statistics-zone-maps https://www.ibm.com/docs/en/psfa/7.2.1?topic=statistics-zone... Incidentally, Netezza was built on Postgres engine, years back.