消费kafka中销售数据,然后分别写入到mysql的销售订单表(tbl_sales_order)和销售商品表(tbl_sales_goods),它们是一对多的关系。两张表都有生成的主键id,其中销售商品表还有外键id能关联销售订单表的主键id。请使用RisingWave实时数据库实现以上需求。
要使用RisingWave实时数据库实现从Kafka消费销售数据,并将其分别写入到MySQL的销售订单表(tbl_sales_order
)和销售商品表(tbl_sales_goods
),可以按照以下步骤进行:
准备环境:
tbl_sales_order
和tbl_sales_goods
表。创建Kafka连接器: 在RisingWave中创建一个Kafka连接器,用于消费Kafka中的销售数据。
创建RisingWave流表: 在RisingWave中创建流表,用于存储从Kafka消费到的数据。
创建RisingWave物化视图: 创建物化视图,将流表中的数据转换为适合写入MySQL的格式。
创建MySQL连接器: 在RisingWave中创建一个MySQL连接器,用于将数据写入MySQL。
创建RisingWave流任务:
创建流任务,将物化视图中的数据写入MySQL的tbl_sales_order
和tbl_sales_goods
表。
以下是具体的SQL示例:
CREATE SOURCE sales_data_source
WITH (
connector = 'kafka',
topic = 'sales_topic',
bootstrap.servers = 'kafka_broker:9092',
format = 'json'
);
CREATE TABLE sales_data (
order_id STRING,
order_date TIMESTAMP,
customer_id STRING,
total_amount DECIMAL,
goods_id STRING,
goods_name STRING,
goods_quantity INT,
goods_price DECIMAL
) WITH (source = 'sales_data_source');
-- 物化视图用于订单数据
CREATE MATERIALIZED VIEW sales_orders AS
SELECT
order_id,
order_date,
customer_id,
total_amount
FROM sales_data
GROUP BY order_id, order_date, customer_id, total_amount;
-- 物化视图用于商品数据
CREATE MATERIALIZED VIEW sales_goods AS
SELECT
order_id,
goods_id,
goods_name,
goods_quantity,
goods_price
FROM sales_data;
CREATE SINK sales_orders_sink
WITH (
connector = 'jdbc',
url = 'jdbc:mysql://mysql_host:3306/sales_db',
table = 'tbl_sales_order',
username = 'your_username',
password = 'your_password'
);
CREATE SINK sales_goods_sink
WITH (
connector = 'jdbc',
url = 'jdbc:mysql://mysql_host:3306/sales_db',
table = 'tbl_sales_goods',
username = 'your_username',
password = 'your_password'
);
-- 将订单数据写入MySQL
CREATE MATERIALIZED VIEW write_sales_orders AS
SELECT
order_id,
order_date,
customer_id,
total_amount
FROM sales_orders
WITH (sink = 'sales_orders_sink');
-- 将商品数据写入MySQL
CREATE MATERIALIZED VIEW write_sales_goods AS
SELECT
order_id,
goods_id,
goods_name,
goods_quantity,
goods_price
FROM sales_goods
WITH (sink = 'sales_goods_sink');
确保MySQL中的表结构与RisingWave中的物化视图结构匹配:
-- tbl_sales_order 表结构
CREATE TABLE tbl_sales_order (
id INT AUTO_INCREMENT PRIMARY KEY,
order_id VARCHAR(255) NOT NULL,
order_date DATETIME NOT NULL,
customer_id VARCHAR(255) NOT NULL,
total_amount DECIMAL(10, 2) NOT NULL
);
-- tbl_sales_goods 表结构
CREATE TABLE tbl_sales_goods (
id INT AUTO_INCREMENT PRIMARY KEY,
order_id VARCHAR(255) NOT NULL,
goods_id VARCHAR(255) NOT NULL,
goods_name VARCHAR(255) NOT NULL,
goods_quantity INT NOT NULL,
goods_price DECIMAL(10, 2) NOT NULL,
FOREIGN KEY (order_id) REFERENCES tbl_sales_order(order_id)
);
通过以上步骤,你可以实现从Kafka消费销售数据,并将其分别写入到MySQL的销售订单表和销售商品表。请根据实际情况调整连接器配置和表结构。