如何在 OrientDB 中的一个 SQL 查询中插入顶点后立即创建边？

Question

I have created vertex class Person and edge class friends. After insertion in class Person the query result returns @rid and some kind of other data or properties etc.

and I want to use this @rid for creating edges between vertices. I want to implement something like:

create edge friends 
from (insert into person (name) values("John")) 
to (insert into person (name) values("Ann"))

so that I should be able to create edge immediately in one query.

I am inserting batch data with prepared statement, that's why I can't get @rid after insertion, and because of that I want to make it in one query. I suppose it would be faster as well.

How to do that?

Answer 1

You can use batch scripts and LET statements:

LET $alice = insert into person (name) values("Alice");
LET $bob = insert into person (name) values("Bob");
LET $charlie = insert into person (name) values("Charlie");
create edge friends from $alice to $bob;
create edge friends from $bob to $charlie;

If you do it from Studio, make sure you select the BATCH mode.