datax 开启字段血缘

在 datax 中开启字段血缘功能，需要在 Job 配置文件中添加如下配置：

{
    "job": {
        "setting": {
            "speed": {
                "channel": 3
            },
            "errorLimit": {
                "record": 0,
                "percentage": 0.02
            },
            "dirtyDataPath": "/tmp/datax/dirtyfile",
            "fieldLineage": true   // 开启字段血缘功能
        },
        "content": [
            {
                "reader": {
                    "name": "mysqlreader",
                    "parameter": {
                        "username": "root",
                        "password": "123456",
                        "column": ["id","name","age","gender"],
                        "connection": [
                            {
                                "table": [
                                    "test"
                                ],
                                "jdbcUrl": [
                                    "jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=false"
                                ]
                            }
                        ]
                    }
                },
                "writer": {
                    "name": "mysqlwriter",
                    "parameter": {
                        "writeMode": "insert",
                        "username": "root",
                        "password": "123456",
                        "column": ["id","name","age","gender"],
                        "connection": [
                            {
                                "jdbcUrl": "jdbc:mysql://localhost:3306/test?characterEncoding=utf8&useSSL=false",
                                "table": ["test_copy"]
                            }
                        ]
                    }
                }
            }
        ]
    }
}

在上面的配置中，我们将 `"fieldLineage": true` 添加到了 `job.setting` 中。这样就开启了字段血缘功能。