场景

DataX-阿里开源离线同步工具在Windows上实现Sqlserver到Mysql全量同步和增量同步:

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/130330353

在上面实现sqlserver到mysql的数据同步之后，如果要实现postgresql到mysql数据同步流程一样。

以PostGis中的OGC元数据表中的保存坐标系统信息的spatial_ref_sys表为例。

在mysql中新建同样结构的表，将postgresql中这个表的数据同步到mysql的表中。

注：

博客：
https://blog.csdn.net/badao_liumang_qizhi

实现

1、获取postgresqlreader到mysqlwriter的模板

python datax.py -r postgresqlreader -w mysqlwriter

2、复制json模板到postgresql2mysql.json文件

参考配置项说明文档

https://github.com/alibaba/DataX/blob/master/postgresqlreader/doc/postgresqlreader.md

修改json文件为自己对应的url和列等信息。

{
    "job": {
        "content": [
            {
                "reader": {
                    "name": "postgresqlreader",
                    "parameter": {
                        "connection": [
                            {
                                "jdbcUrl": [
        "jdbc:postgresql://127.0.0.1:5432/数据库名"
        ],
                                "table": [
        "spatial_ref_sys"
        ]
                            }
                        ],
                        "password": "密码",
                        "username": "postgres",
      "column": [
      "srid",
      "auth_name",
      "auth_srid",
      "srtext",
      "proj4text",
      ]
                    }
                },
                "writer": {
                    "name": "mysqlwriter",
                    "parameter": {
                        "column": [
      "srid",
      "auth_name",
      "auth_srid",
      "srtext",
      "proj4text",
      ],
                        "connection": [
                            {
                                "jdbcUrl": "jdbc:mysql://127.0.0.1:3306/数据库名?useUnicode=true&characterEncoding=gbk",
                                "table": [
        "spatial_ref_sys"
        ]
                            }
                        ],
                        "password": "密码",
                        "preSql": [
      "delete from spatial_ref_sys"
      ],
                        "session": [],
                        "username": "root",
                        "writeMode": "insert"
                    }
                }
            }
        ],
        "setting": {
            "speed": {
                "channel": "5"
            }
        }
    }
}

执行同步命令

python datax.py ./postgresql2mysql.json

同步成功