Hi. I am from GreptimeDB team. We use h3o library to implement h3 functions: https://docs.greptime.com/reference/sql/functions/geo/#h3 https://docs.greptime.c

Hi. I am from GreptimeDB team. We use h3o library to implement h3 functions: https://docs.greptime.com/reference/sql/functions/geo/#h3 https://docs.greptime.com/reference/sql/functions/geo/#h3 These functions encode and decode latitude/longitude to H3 cells and provide utilities for querying cell properties, neighborhoods, distances, and relationships.