• • 什么是图形ID？**

为简单实体分配唯一的图形ID。图形ID是实体标签ID和分配给每个标签的唯一序列的唯一组合。请注意，在比较来自不同图形的实体时，ID会重叠。
参考：https://age.apache.org/age-manual/master/intro/types.html

test=# LOAD 'age';
LOAD
test=# SET search_path = ag_catalog, "$user", public;
SET
test=# SELECT * FROM cypher('graph', $$
MATCH (v)
RETURN v
$$) as (v agtype);
                                                     v
------------------------------------------------------------------------------------------------------------
 {"id": 844424930131969, "label": "Person", "properties": {"name": "John"}}::vertex
 {"id": 844424930131970, "label": "Person", "properties": {"name": "Jeff"}}::vertex
 {"id": 844424930131971, "label": "Person", "properties": {"name": "Joan"}}::vertex
 {"id": 844424930131972, "label": "Person", "properties": {"name": "Bill"}}::vertex
 {"id": 844424930131973, "label": "Person", "properties": {"name": "Andres", "title": "Developer"}}::vertex
(5 rows)

这里的id实际上是GraphID。