1. Requirements: now the database uses mysql5.7 version, which can support GIS operation and json operation natively. However, due to various reasons, it is necessary to change the database to version 5.6, so you need to add the space expansion of mysql.
2, question: can not find relevant tutorials on the Internet to install extensions, only some function documents, if there are tutorials and links for mysql installation space expansion, please let me know, thank you.
3. Purpose: the project mainly uses st_asGeoJson (), ST_GeomFromText (), and the storage of geometric type fields, and does not use the calculation of distance area, as long as these can be used normally.