-select * from (select id, id_1 from graph_table ( pg match (p:person)-[k:know]->(p2:person) columns (p.id, p2.id)));

CREATE TABLE Student(id BIGINT, name VARCHAR);INSERT INTO Student VALUES (0, 'Daniel'), (1, 'Tavneet'), (2, 'Gabor'), (3, 'Peter'), (4, 'David');

CREATE TABLE know(src BIGINT, dst BIGINT, createDate BIGINT);INSERT INTO know VALUES (0,1, 10), (0,2, 11), (0,3, 12), (3,0, 13), (1,2, 14), (1,3, 15), (2,3, 16), (4,3, 17);

CREATE TABLE School(name VARCHAR, Id BIGINT, Kind VARCHAR);INSERT INTO School VALUES ('VU', 0, 'University'), ('UVA', 1, 'University');

CREATE TABLE StudyAt(personId BIGINT, schoolId BIGINT);INSERT INTO StudyAt VALUES (0, 0), (1, 0), (2, 1), (3, 1), (4, 1);

CREATE PROPERTY GRAPH pg
VERTEX TABLES (
    Student PROPERTIES ( id, name ) LABEL Person,
    School LABEL SCHOOL
    )
EDGE TABLES (
    know    SOURCE KEY ( src ) REFERENCES Student ( id )
            DESTINATION KEY ( dst ) REFERENCES Student ( id ),
    studyAt SOURCE KEY ( personId ) REFERENCES Student ( id )
            DESTINATION KEY ( SchoolId ) REFERENCES School ( id )
    );

select * from (select id, id_1 from graph_table ( pg match (p:person)-[k:know]->(p2:person) columns (p.id, p2.id)));