[未完待续] PostgreSQL 图计算
背景
https://news.ycombinator.com/item?id=10316872
https://www.fusionbox.com/blog/detail/graph-algorithms-in-a-database-recursive-ctes-and-topological-sort-with-postgres/620/
https://stackoverflow.com/questions/33465859/a-number-of-connected-components-of-a-graph-in-sql
https://engineering.hipolabs.com/graphdb-to-postgresql/
https://github.com/bjornharrtell/pggraph
http://hansolav.net/sql/graphs.html#dijkstra
http://www.agensgraph.com/
http://www.opencypher.org/
https://opensource.com/article/17/7/fundamentals-graph-databases-neo4j
http://pgrouting.org/