nGQL Basic

 

https://docs.nebula-graph.io/3.8.0/2.quick-start/4.nebula-graph-crud/

Space 생성

CREATE SPACE `sites` (partition_num = 1000, replica_factor = 3, vid_type = FIXED_STRING(64)) COMMENT = "site relations"

 

TAG, EDGE 만들기

CREATE TAG site(url string);
CREATE EDGE follow(weight int);

 

VERTEX, EDGE 데이터 넣기

INSERT VERTEX site(url) VALUES "64f3134d1e65568291bac977cf60019a2e1d2e1e537231a88f4ab90c6ab0b9c9":("http://home.ebs.co.kr/ebsnews/menu1/newsAllView/10500664/hotline@ebs.co.kr");

INSERT EDGE follow(weight) VALUES "64f3134d1e65568291bac977cf60019a2e1d2e1e537231a88f4ab90c6ab0b9c9" -> "c46643524a9aa27a96b076132ed42a5c7280bd35ff96dc37cbdd1e2daeaf716a":(11);

 

넣은 데이터 살펴보기 / 전체 개수

SUBMIT JOB STATS;
SHOW STATS;

MATCH (v:site) RETURN v LIMIT 10;
MATCH (v:site) RETURN count(*);

MATCH ()-[e:follow]->() RETURN e LIMIT 10;
MATCH ()-[e:follow]->() RETURN count(*);

FETCH PROP ON site "e9a6d90b6dfe7dd225881e4396b83aeb3d80d99f687ee81d2ced8bb73e3f0f9d" YIELD properties(VERTEX);

 

탐색

# 정확히 5 steps 에 위치한 vertex
GO 5 STEPS FROM "e9a6d90b6dfe7dd225881e4396b83aeb3d80d99f687ee81d2ced8bb73e3f0f9d" over follow YIELD dst(EDGE) | LIMIT 10;

# 5 steps 안에 위치한 모든 vertex
GO 1 TO 5 STEPS FROM "e9a6d90b6dfe7dd225881e4396b83aeb3d80d99f687ee81d2ced8bb73e3f0f9d" over follow YIELD dst(EDGE) | LIMIT 10;

 

 

연결된 session 관리

show SESSIONS;
kill SESSION <sessionId>

 

 

storage host 제외하기

BALANCE DATA REMOVE "host1":9779,"host2":9779;
show JOB <jobId>;
show JOBS;

# JOB 완료 후
DROP HOSTS "host1":9779,"host2":9779;