태그: Cypher

AgensGraph: graph sampling with random selection

In the previous post, we did make ag_labels() function by #plpgsql. In this time, we will make ag_sample() function that do sampling graph-data by limit N on an edge basis. Also this function has the optional parameter of whether using random-selection. PL/pgSQL is a loadable procedural language for the PostgreSQL database system. [ref] It adds ...

AgensBrowser – PL/Python editor

#AgensGraph is built on the base of #postgresql and take over the functions of postgresql extentions like PL/Python, PL/R, etc. Especially #PL_Python is powerful and used widly on Data-analysis domain. For examples, PL/Python functions parsed by postgresql can work the way you want it to data preprocessing, search algorithms, db-handling, so on. Also it could query by Cypher and modify ...

What does “path” in cypher query?

You can query node, edge, path by #Cypher to #GDB like #AgensGraph. #Path is a component of graph and is composed with nodes and edge. Path means set of relation like #join of #RDB. When a few of paths come together, those make a graph. But no-connected paths are not graph, just tree. A graph can have a circulation of relation ...