Orientdb 在轻量级模式下,两个顶点使用相同的边连接两次
有关轻量化边缘的说明: 两个顶点通过最大1条边连接,因此如果两个顶点之间已经有一条边,并且正在相同顶点之间创建新边,则第二条边将是规则的 查看以下脚本:Orientdb 在轻量级模式下,两个顶点使用相同的边连接两次,orientdb,graph-databases,nosql,Orientdb,Graph Databases,Nosql,有关轻量化边缘的说明: 两个顶点通过最大1条边连接,因此如果两个顶点之间已经有一条边,并且正在相同顶点之间创建新边,则第二条边将是规则的 查看以下脚本: drop database plocal:../databases/test-lightweight admin admin; create database plocal:../databases/test-lightweight admin admin; connect plocal:../databases/test-lightwei
drop database plocal:../databases/test-lightweight admin admin;
create database plocal:../databases/test-lightweight admin admin;
connect plocal:../databases/test-lightweight admin admin;
alter database custom useLightweightEdges=true;
// Vertices
CREATE class Driver extends V;
CREATE PROPERTY Driver.name STRING;
// Edges
CREATE class Knows extends E;
CREATE PROPERTY Knows.in LINK Driver MANDATORY=true;
CREATE PROPERTY Knows.out LINK Driver MANDATORY=true;
// DATA
CREATE VERTEX Driver SET name = 'Jochen';
CREATE VERTEX Driver SET name = 'Ronnie';
// Jochen and Ronnie are very good friends
CREATE EDGE Knows FROM (SELECT FROM Driver WHERE name = 'Jochen') to (SELECT FROM Driver WHERE name = 'Ronnie');
CREATE EDGE Knows FROM (SELECT FROM Driver WHERE name = 'Jochen') to (SELECT FROM Driver WHERE name = 'Ronnie');
SELECT expand(out()) FROM (SELECT FROM Driver WHERE name = 'Jochen'); // 2 times Ronnie
SELECT count(*) FROM Knows; // 0
我希望最后一次计数返回1,但它返回0
当我执行相同的脚本但禁用轻量级模式时,结果是2(正如预期的那样)