96 lines
2.2 KiB
Markdown
96 lines
2.2 KiB
Markdown
## demo2 双流kafka写入mysql 参考
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source kafka json 数据格式
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topic flink_test_1 {"day_time": "20201011","id": 8,"amnount":211}
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topic flink_test_2 {"id": 8,"coupon_amnount":100}
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注意：针对双流中的每条记录都发触发
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sink mysql 创建语句
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```sql
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CREATE TABLE `sync_test_2` (
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`id` bigint(11) NOT NULL AUTO_INCREMENT,
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`day_time` varchar(64) DEFAULT NULL,
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`total_gmv` bigint(11) DEFAULT NULL,
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PRIMARY KEY (`id`),
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UNIQUE KEY `uidx` (`day_time`) USING BTREE
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) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4;
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```
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配置语句
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```sql
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create table flink_test_2_1 (
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id BIGINT,
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day_time VARCHAR,
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amnount BIGINT,
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proctime AS PROCTIME ()
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)
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with (
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'connector' = 'kafka',
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'topic' = 'flink_test_1',
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'properties.bootstrap.servers' = '172.25.20.76:9092',
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'properties.group.id' = 'flink_gp_test2-1',
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'scan.startup.mode' = 'earliest-offset',
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'format' = 'json',
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'json.fail-on-missing-field' = 'false',
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'json.ignore-parse-errors' = 'true',
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'properties.zookeeper.connect' = '172.25.20.76:2181/kafka'
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);
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create table flink_test_2_2 (
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id BIGINT,
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coupon_amnount BIGINT,
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proctime AS PROCTIME ()
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)
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with (
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'connector' = 'kafka',
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'topic' = 'flink_test_2',
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'properties.bootstrap.servers' = '172.25.20.76:9092',
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'properties.group.id' = 'flink_gp_test2-2',
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'scan.startup.mode' = 'earliest-offset',
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'format' = 'json',
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'json.fail-on-missing-field' = 'false',
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'json.ignore-parse-errors' = 'true',
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'properties.zookeeper.connect' = '172.25.20.76:2181/kafka'
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);
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CREATE TABLE sync_test_2 (
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day_time string,
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total_gmv bigint,
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PRIMARY KEY (day_time) NOT ENFORCED
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) WITH (
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'connector' = 'jdbc',
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'url' = 'jdbc:mysql://172.25.21.10:3306/flink_web?characterEncoding=UTF-8',
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'table-name' = 'sync_test_2',
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'username' = 'videoweb',
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'password' = 'suntek'
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);
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INSERT INTO sync_test_2
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SELECT
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day_time,
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SUM(amnount - coupon_amnount) AS total_gmv
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FROM
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(
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SELECT
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a.day_time as day_time,
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a.amnount as amnount,
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b.coupon_amnount as coupon_amnount
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FROM
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flink_test_2_1 as a
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LEFT JOIN flink_test_2_2 b on b.id = a.id
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)
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GROUP BY
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day_time;
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```
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