New GIS Features in MySQL 5.7.md 1.3 KB
Title: "New GIS Features in MySQL 5.7" Date: 2017-12-20 10:47:59 Categories: [data base] tags: [mysql, mariadb, percona]
Authors: sedlav
MySQL 5.7 introduces the following major improvements and features for GIS:
- Spatial indexes for InnoDB. Finally it is here! This was a long overdue feature, which also prevented * many companies from converting all tables to InnoDB.
- st_distance_sphere: native function to calculate a distance between two points on earth. Finally it is * here as well! Like many others, I’ve created my stored procedure to calculate the distance between points * on earth using haversine formula. The native function is ~20x faster than the stored procedure (in an * artificial benchmark, see below). This is not surprising, as stored procedures are slow computationally – * especially for trigonometrical functions.
- New functions: GeoHash and GeoJSON. With GeoJSON we can generate the results that are ready for * visualizing on Google Maps.
- New GIS implementation based on Boost.Geometry library. This is great news, as originally GIS was * implemented independently from scratch with a very limited set of features. Manyi Lu from MySQL server * team provides more reasoning behind the choice of Boost.Geometry.