| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| // One undirected edge definition of one to two hops. |
| FROM GRAPH VERTEX (:User) |
| PRIMARY KEY (user_id) |
| AS Yelp.Users, |
| EDGE (:User)-[:FRIENDS_WITH]->(:User) |
| SOURCE KEY (user_id) |
| DESTINATION KEY (friend) |
| AS ( FROM Yelp.Friends F |
| SELECT F.user_id AS user_id, |
| F.friend AS friend ) |
| MATCH (u2:User)-[fw:FRIENDS_WITH{1,2}]-(u1:User) |
| LET fw_edge = ( FROM fw.Edges FW |
| SELECT VALUE FW.friend ) |
| SELECT u1.user_id AS u1_user_id, |
| u2.user_id AS u2_user_id, |
| fw_edge, |
| LEN(fw_edge) AS fw_hops |
| ORDER BY u1_user_id, u2_user_id, fw_edge; |
