clickhouse reader

以下是使用ClickHouse Reader读取数据的示例代码：

{
    "job": {
        "content": [
            {
                "reader": {
                    "name": "clickhousereader",
                    "parameter": {
                        "username": "your_username",
                        "password": "your_password",
                        "column": [
                            "column1",
                            "column2",
                            "column3"
                        ],
                        "where": "column1 > 10",
                        "presto": false,
                        "clickhouse": {
                            "jdbcUrl": [
                                "jdbc:clickhouse://your_clickhouse_host:8123/your_database"
                            ]
                        }
                    }
                },
                "writer": {
                    "name": "streamwriter",
                    "parameter": {
                        "print": true
                    }
                }
            }
        ],
        "setting": {
            "speed": {
                "channel": 1
            }
        }
    }
}

其中，需要将`your_username`和`your_password`替换为你的ClickHouse数据库的用户名和密码，将`column1`、`column2`和`column3`替换为你需要读取的列名，将`column1 > 10`替换为你需要的筛选条件，将`your_clickhouse_host`和`your_database`替换为你的ClickHouse数据库的主机名和数据库名。