Neo4j CSV导入状态更新
所以我尝试从Mysql数据库迁移到neo4j数据库。对于新的neo4j数据库,我计划了newsfeed特性,正如这里所解释的,这种机制显然不同于mysql,mysql中的newsfeed只是一堆行。那么,有没有办法以Neo4j CSV导入状态更新,neo4j,cypher,Neo4j,Cypher,所以我尝试从Mysql数据库迁移到neo4j数据库。对于新的neo4j数据库,我计划了newsfeed特性,正如这里所解释的,这种机制显然不同于mysql,mysql中的newsfeed只是一堆行。那么,有没有办法以-[status\u update]->()-[next]->()-格式将mysql行快速导入neo4j中呢?目前我有一个mysql数据库,如下所示: user table +-------+--------------+ | id | username | +----
-[status\u update]->()-[next]->()-
格式将mysql行快速导入neo4j中呢?目前我有一个mysql数据库,如下所示:
user table
+-------+--------------+
| id | username |
+-------+--------------+
| 1 | pewpewlasers |
+-------+--------------+
posts table
+-------+----------+------------+
| id | user_id | status |
+-------+----------+------------+
| 1 | 1 | something |
+-------+----------+------------+
| 2 | 1 | new update |
+-------+----------+------------+
如果您将其输出为CSV,您可以使用如下方式使用
加载CSV
:
USING PERIODIC COMMIT 1000
LOAD CSV WITH HEADERS FROM "file:///path/to/file/user.csv" AS line
CREATE (:User {id: toInt(line.id), username: line.username});
USING PERIODIC COMMIT 1000
LOAD CSV WITH HEADERS FROM "file:///path/to/file/posts.csv" AS line
CREATE (:Post {id: toInt(line.id), line.status});
USING PERIODIC COMMIT 1000
LOAD CSV WITH HEADERS FROM "file:///path/to/file/posts.csv" AS line
MATCH (user:User {id: toInt(line.user_id)})
MATCH (post:Post {id: toInt(line.id)})
CREATE user-[:status_update]->post;
USING PERIODIC COMMIT 1000
LOAD CSV WITH HEADERS FROM "file:///path/to/file/posts.csv" AS line
MATCH
(post:Post {id: toInt(line.id)})
(previous_post:Post {id: toInt(line.id) - 1})
CREATE previous_post-[:next]->post;
您可能可以组合其中一些查询,但我总是小心地将查询拆分,因为这里提到了一个迫切需要解决的问题:
不得不改变一些事情,但这是个好主意。谢谢