图数据库
核心概念 顶点vertex 边edge cypher查询语言 主要选型 apache AGE neo4j 101 基于apache AGE的基础测试 -- 开启 LOAD 'age'; SET search_path = ag_catalog, "$user", public; SELECT * FROM ag_catalog.drop_graph('geae', true); SELECT create_graph('geae'); SELECT * FROM cypher('geae', $$ CREATE (i1:Invoice {id:'123', name: '发票1', code: 'B1'}), (i2:Invoice {name: '发票2', code:'B2'}), (f1:Form {name: "单据1", comment: "发票:B1"}), (f2:Form {name: "单据2", comment: "发票:B2"}), (f3:Form {name: "单据3", comment: "发票:B3"}) $$) as (a agtype); SELECT * FROM cypher('geae', $$ MATCH (a:Invoice), (b:Form) WHERE b.comment contains a.code AND b.xxx = a.ccc CREATE (a)-[e:包含 {property:a.property + '<->' + b.property}]->(b) RETURN e $$) as (e agtype); SELECT * from cypher('geae', $$ MATCH (V)-[R:包含]-(V2) RETURN V,R,V2 $$) as (V agtype, R agtype, V2 agtype); ...