同一schema配置多个文件

[AlexYangLi]

你好，想请教一下。假如我在yaml里面分别配置了两个path：student_0.csv和student_1.csv，都用于导入schema是student（具有属性：name）的点数据。两个文件可能包含vertext id相同的student数据。请问：

1. 最后读到的点个数是两个文件数据的并集吗？
2. 假如对于同一个student(vertext id相同)，在student_0.csv里name属性是”A“，但在student_1.csv里name属性是”B“，请问最终在图空间里name属性会是什么？

[wey-gu]

Dear @AlexYangLi

1. Underlying, the importer will do nGQL INSERT, and those lines with the same VID will override inserted ones.
2. It will be the value parsed at the latest time.

(user@nebula) [basketballplayer]> insert vertex player(name,age) values "player106":("Kyle Anderson", 25);
Execution succeeded (time spent 1871/2442 us)

Thu, 24 Jun 2021 06:40:29 UTC

(user@nebula) [basketballplayer]> FETCH PROP ON player "player106";
+------------------------------------------------------------------------+
| vertices_                                                              |
+------------------------------------------------------------------------+
| ("player106" :player{age: 25, name: "Kyle Anderson", name1: __NULL__}) |
+------------------------------------------------------------------------+
Got 1 rows (time spent 1816/2356 us)

Thu, 24 Jun 2021 06:40:31 UTC

(user@nebula) [basketballplayer]> insert vertex player(name,age) values "player106":("Kyle Anderson", 125);
Execution succeeded (time spent 1756/2381 us)

Thu, 24 Jun 2021 06:40:40 UTC

(user@nebula) [basketballplayer]> FETCH PROP ON player "player106";
+-------------------------------------------------------------------------+
| vertices_                                                               |
+-------------------------------------------------------------------------+
| ("player106" :player{age: 125, name: "Kyle Anderson", name1: __NULL__}) |
+-------------------------------------------------------------------------+
Got 1 rows (time spent 1819/2465 us)

Thu, 24 Jun 2021 06:40:41 UTC

https://docs.nebula-graph.com.cn/2.0.1/3.ngql-guide/12.vertex-statements/1.insert-vertex/

[AlexYangLi]

Got it! Thanks a lot!