OrientDB 从 CSV 文件导入到图形 - ETL答案

【问题标题】：OrientDB Import from a CSV file to a Graph - ETLOrientDB 从 CSV 文件导入到图形 - ETL
【发布时间】：2017-08-04 10:13:56
【问题描述】：

此 CSV 已创建 ETL 并将其导入 OrientDB：

userlist.csv:

ID,NAME
1,SATOSHI
2,TONA
3,MIKI
4,YUJI
5,OTA

但是，我不知道如何制作一个 ETL，该 ETL 可以导入此 CSV 文件。

relation.csv:

FROM_ID,TO_ID,WEIGHT
1,2,4
1,3,4
1,5,3
2,5,3
2,3,5
...

FROM_ID 和TO_ID 表示userlist.csv 的ID。 WEIGHT 是可选的。

请教我如何正确编写ETL。

【问题讨论】：

标签： csv graph import orientdb

【解决方案1】：

试试这个：

    {
  "source" : {
    "file": { "path": "your_path/relation.csv" }
  },
  "extractor" : {
    "csv": {}
  },
   "transformers": [
        { "command": { "command": "CREATE EDGE E FROM (SELECT FROM userlist-class where id = ${input.FROM_ID}) TO (SELECT FROM userlist-class where id = ${input.TO_ID}) set weight=${input.WEIGHT}"} }
    ],
  "loader" : {
    "orientdb": {
      "dbURL": "plocal:your-path/databases/db-name",
      "dbUser": "your-user",
      "dbPassword": "your-pwd",
      "serverUser": "your-server-user",
      "serverPassword": "your-server-pwd",
      "dbType": "graph",
      "classes": [{"name": "userlist-class-name", "extends":"V"}]
    }
  }
}

更新

{
  "source" : {
    "file": { "path": "C:/Users/Sorint.Lab/Desktop/Orient/Community/orientdb-community-2.2.24/config/relation.csv" }
  },
  "extractor" : {
    "csv": {}
  },
   "transformers": [
        { "command": { "command": "CREATE EDGE USER_RELATION_FRIEND FROM (SELECT FROM userList where id = ${input.FROM_ID}) TO (SELECT FROM userList where id = ${input.TO_ID}) set weight=${input.WEIGHT}"} }
    ],
  "loader" : {
    "orientdb": {
      "dbURL": "plocal:C:/Users/Sorint.Lab/Desktop/Orient/Community/orientdb-community-2.2.24/databases/stack45504136",
      "dbUser": "admin",
      "dbPassword": "admin",
      "serverUser": "root",
      "serverPassword": "root",
      "dbType": "graph",
      "classes": [
            {"name": "userList", "extends":"V"},
            {"name": "USER_RELATION_FRIEND", "extends":"E"}
            ]
    }
  }
}

希望对你有帮助

问候

【讨论】：

我试过但收到以下错误。 ** 错误异常=解析查询错误：CREATE EDGE USER_RELATION_FRIEND FROM (SELECT FROM USER_INFO WHERE ID = ) TO (SELECT FROM USER_INFO WHERE ID = 2) SET weight= ^ 在第 1 行第 1 列遇到“”CREATE“” . ** 还有什么可以做的吗？
不，它不存在。我想过用这个 ETL 来实现它。
谢谢你更新你的答案。我试过了，但我又得到了同样的错误。 “CREATE”在这个 ETL 中可用吗？