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我创建了一个源主题订阅者有这样的输入消息：

{
  "ip_router": "",
  "ip_lan": "",
  "isdn": "2046573688",
  "end_datetime": "",
  "shop_code": "1000405100",
  "reg_type_id": "5131615",
  "contract_id": "",
  "update_datetime": "20170801171355",
  "project": "",
  "telecom_service_id": "2",
  "local_speed": "",
  "password": "",
  "price_plan": "",
  "vip": "",
  "local_price_plan": "",
  "sub_id": "1083168000",
  "sta_datetime": "20090511152847",
  "update_number_1": "1",
  "act_status": "000",
  "network_class": "",
  "limit_usage": "",
  "num_reset_zone": "",
  "deposit": "",
  "create_user": "TUDV_POPBGG",
  "num_of_computer": "",
  "cust_id": "10922428129",
  "status": "2",
  "active_datetime": "20090511152102",
  "ip_view": "",
  "channel_type_id": "",
  "ip_wan": "",
  "imsi": "452049760887694",
  "infrastructure_type": "",
  "product_code": "HPN03",
  "expire_datetime": "",
  "speed": "",
  "private_ip": "",
  "update_user": "MIGRATE",
  "ip_static": "",
  "vlan": "",
  "sub_type": "",
  "create_datetime": "20090511152102",
  "is_info_completed": "1",
  "pay_type": "2",
  "up_link": "",
  "promotion_code": "",
  "technology": "",
  "offer_id": "400001035",
  "dev_staff_id": "",
  "account_id": "",
  "deploy_accept_date": "",
  "serial": "8984049767000887694",
  "group_id": "",
  "ip_gateway": "",
  "first_connect": "",
  "org_product_code": "MIGRATE",
  "start_money": "100000",
  "keep_alive": "",
  "account": ""
}

然后我在上面创建了一个流和一个表：

CREATE STREAM str_subscriber_json (sub_id VARCHAR,contract_id VARCHAR,cust_id VARCHAR,account_id VARCHAR,telecom_service_id VARCHAR,isdn VARCHAR,imsi VARCHAR,serial VARCHAR,status VARCHAR,product_code VARCHAR,offer_id VARCHAR,act_status VARCHAR,sta_datetime BIGINT,active_datetime BIGINT,sub_type VARCHAR,end_datetime BIGINT,expire_datetime BIGINT,shop_code VARCHAR,dev_staff_id VARCHAR,promotion_code VARCHAR,vip VARCHAR,account VARCHAR,create_datetime BIGINT,create_user VARCHAR,update_datetime BIGINT,update_user VARCHAR,deposit VARCHAR,limit_usage VARCHAR,password VARCHAR,org_product_code VARCHAR,num_reset_zone VARCHAR,start_money VARCHAR,is_info_completed VARCHAR,channel_type_id VARCHAR,first_connect VARCHAR,speed VARCHAR,keep_alive VARCHAR,price_plan VARCHAR,local_price_plan VARCHAR,project VARCHAR,local_speed VARCHAR,technology VARCHAR,network_class VARCHAR,infrastructure_type VARCHAR,deploy_accept_date BIGINT,group_id VARCHAR,ip_static VARCHAR,ip_view VARCHAR,ip_lan VARCHAR,ip_wan VARCHAR,ip_gateway VARCHAR,ip_router VARCHAR,num_of_computer VARCHAR,vlan VARCHAR,up_link VARCHAR,private_ip VARCHAR,pay_type VARCHAR,update_number_1 VARCHAR,reg_type_id VARCHAR,type VARCHAR,update_number VARCHAR) WITH (KAFKA_TOPIC='subscriber', VALUE_FORMAT='JSON');

CREATE TABLE tbl_subscriber_json (sub_id VARCHAR,contract_id VARCHAR,cust_id VARCHAR,account_id VARCHAR,telecom_service_id VARCHAR,isdn VARCHAR,imsi VARCHAR,serial VARCHAR,status VARCHAR,product_code VARCHAR,offer_id VARCHAR,act_status VARCHAR,sta_datetime BIGINT,active_datetime BIGINT,sub_type VARCHAR,end_datetime BIGINT,expire_datetime BIGINT,shop_code VARCHAR,dev_staff_id VARCHAR,promotion_code VARCHAR,vip VARCHAR,account VARCHAR,create_datetime BIGINT,create_user VARCHAR,update_datetime BIGINT,update_user VARCHAR,deposit VARCHAR,limit_usage VARCHAR,password VARCHAR,org_product_code VARCHAR,num_reset_zone VARCHAR,start_money VARCHAR,is_info_completed VARCHAR,channel_type_id VARCHAR,first_connect VARCHAR,speed VARCHAR,keep_alive VARCHAR,price_plan VARCHAR,local_price_plan VARCHAR,project VARCHAR,local_speed VARCHAR,technology VARCHAR,network_class VARCHAR,infrastructure_type VARCHAR,deploy_accept_date BIGINT,group_id VARCHAR,ip_static VARCHAR,ip_view VARCHAR,ip_lan VARCHAR,ip_wan VARCHAR,ip_gateway VARCHAR,ip_router VARCHAR,num_of_computer VARCHAR,vlan VARCHAR,up_link VARCHAR,private_ip VARCHAR,pay_type VARCHAR,update_number_1 VARCHAR,reg_type_id VARCHAR,type VARCHAR,update_number VARCHAR) WITH (KAFKA_TOPIC='subscriber', VALUE_FORMAT='JSON', KEY = 'sub_id' );

我尝试使用 ksql 进行测试：

SELECT * FROM str_subscriber_json;

（当我将新的 json 放入订阅者主题时打印结果）

SELECT * FROM tbl_subscriber_json;

（当我将新的 json 放入订阅者主题时没有显示任何内容）

所以请为我澄清这个案子有什么问题？

非常感谢。

4

1 回答 1

4

概括

您的消息需要键入。如果您没有消息键，则 TABLE 的语义没有任何意义（因为如果没有键，您无法显示键的值）。

我已经复制了您的示例，kafkacat用于生成带有和不带有密钥的消息。

测试 1 - 无钥匙

产生测试消息

$ echo '{ "ip_router": "", "ip_lan": "", "isdn": "2046573688", "end_datetime": "", "shop_code": "1000405100", "reg_type_id": "5131615", "contract_id": "", "update_datetime": "20170801171355", "project": "", "telecom_service_id": "2", "local_speed": "", "password": "", "price_plan": "", "vip": "", "local_price_plan": "", "sub_id": "1083168000", "sta_datetime": "20090511152847", "update_number_1": "1", "act_status": "000", "network_class": "", "limit_usage": "", "num_reset_zone": "", "deposit": "", "create_user": "TUDV_POPBGG", "num_of_computer": "", "cust_id": "10922428129", "status": "2", "active_datetime": "20090511152102", "ip_view": "", "channel_type_id": "", "ip_wan": "", "imsi": "452049760887694", "infrastructure_type": "", "product_code": "HPN03", "expire_datetime": "", "speed": "", "private_ip": "", "update_user": "MIGRATE", "ip_static": "", "vlan": "", "sub_type": "", "create_datetime": "20090511152102", "is_info_completed": "1", "pay_type": "2", "up_link": "", "promotion_code": "", "technology": "", "offer_id": "400001035", "dev_staff_id": "", "account_id": "", "deploy_accept_date": "", "serial": "8984049767000887694", "group_id": "", "ip_gateway": "", "first_connect": "", "org_product_code": "MIGRATE", "start_money": "100000", "keep_alive": "", "account": "" }' \
| kafkacat -b localhost:9092 -P -t subscriber

流输出

注意null第二列中的 - 这是关键（第一列是消息的时间戳；其余列是消息中声明的字段）

ksql> select * from str_subscriber_json;
1528368689380 | null | 1083168000 |  | 10922428129 |  | 2 | 2046573688 | 452049760887694 | 8984049767000887694 | 2 | HPN03 | 400001035 | 000 | 20090511152847 | 20090511152102 |  | 0 | 0 | 1000405100 |  |  |  |  | 20090511152102 | TUDV_POPBGG | 20170801171355 | MIGRATE |  |  |  | MIGRATE |  | 100000 | 1 |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  | 2 | 1 | 5131615 | null | null

表输出

ksql> SELECT * FROM tbl_subscriber_json;

（无输出）

测试 2 - 使用密钥集

此处的键任意设置为1，使用kafkacat的-K标志指定:为键/值分隔符。

$ echo '1:{ "ip_router": "", "ip_lan": "", "isdn": "2046573688", "end_datetime": "", "shop_code": "1000405100", "reg_type_id": "5131615", "contract_id": "", "update_datetime": "20170801171355", "project": "", "telecom_service_id": "2", "local_speed": "", "password": "", "price_plan": "", "vip": "", "local_price_plan": "", "sub_id": "1083168000", "sta_datetime": "20090511152847", "update_number_1": "1", "act_status": "000", "network_class": "", "limit_usage": "", "num_reset_zone": "", "deposit": "", "create_user": "TUDV_POPBGG", "num_of_computer": "", "cust_id": "10922428129", "status": "2", "active_datetime": "20090511152102", "ip_view": "", "channel_type_id": "", "ip_wan": "", "imsi": "452049760887694", "infrastructure_type": "", "product_code": "HPN03", "expire_datetime": "", "speed": "", "private_ip": "", "update_user": "MIGRATE", "ip_static": "", "vlan": "", "sub_type": "", "create_datetime": "20090511152102", "is_info_completed": "1", "pay_type": "2", "up_link": "", "promotion_code": "", "technology": "", "offer_id": "400001035", "dev_staff_id": "", "account_id": "", "deploy_accept_date": "", "serial": "8984049767000887694", "group_id": "", "ip_gateway": "", "first_connect": "", "org_product_code": "MIGRATE", "start_money": "100000", "keep_alive": "", "account": "" }' \
| kafkacat -b localhost:9092 -P -t subscriber -K:

流输出

注意1第二列中的 - 这是关键（第一列是消息的时间戳；其余列是消息中声明的字段）

1528368781916 | 1 | 1083168000 |  | 10922428129 |  | 2 | 2046573688 | 452049760887694 | 8984049767000887694 | 2 | HPN03 | 400001035 | 000 | 20090511152847 | 20090511152102 |  | 0 | 0 | 1000405100 |  |  |  |  | 20090511152102 | TUDV_POPBGG | 20170801171355 | MIGRATE |  |  |  | MIGRATE |  | 100000 | 1 |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  | 2 | 1 | 5131615 | null | null

表输出

1528368781916 | 1 | 1083168000 |  | 10922428129 |  | 2 | 2046573688 | 452049760887694 | 8984049767000887694 | 2 | HPN03 | 400001035 | 000 | 20090511152847 | 20090511152102 |  | 0 | 0 | 1000405100 |  |  |  |  | 20090511152102 | TUDV_POPBGG | 20170801171355 | MIGRATE |  |  |  | MIGRATE |  | 100000 | 1 |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  | 2 | 1 | 5131615 | null | null

使用 KSQL 自动重新键入主题

您可以使用 KSQL 对主题进行重新分区。例如，以您的源subscriber主题为例，这里是如何使用 KSQL 对其进行重新分区以设置密钥：

ksql> CREATE STREAM SUBSCRIBER_KEYED AS SELECT * FROM str_subscriber_json PARTITION BY sub_id;

 Message
----------------------------
 Stream created and running
----------------------------
ksql>

这会填充一个 Kafka 主题 ( SUBSCRIBER_KEYED)，然后您可以在该主题上定义一个表：

CREATE TABLE subscriber_table (sub_id VARCHAR,contract_id VARCHAR,cust_id VARCHAR,account_id VARCHAR,telecom_service_id VARCHAR,isdn VARCHAR,imsi VARCHAR,serial VARCHAR,status VARCHAR,product_code VARCHAR,offer_id VARCHAR,act_status VARCHAR,sta_datetime BIGINT,active_datetime BIGINT,sub_type VARCHAR,end_datetime BIGINT,expire_datetime BIGINT,shop_code VARCHAR,dev_staff_id VARCHAR,promotion_code VARCHAR,vip VARCHAR,account VARCHAR,create_datetime BIGINT,create_user VARCHAR,update_datetime BIGINT,update_user VARCHAR,deposit VARCHAR,limit_usage VARCHAR,password VARCHAR,org_product_code VARCHAR,num_reset_zone VARCHAR,start_money VARCHAR,is_info_completed VARCHAR,channel_type_id VARCHAR,first_connect VARCHAR,speed VARCHAR,keep_alive VARCHAR,price_plan VARCHAR,local_price_plan VARCHAR,project VARCHAR,local_speed VARCHAR,technology VARCHAR,network_class VARCHAR,infrastructure_type VARCHAR,deploy_accept_date BIGINT,group_id VARCHAR,ip_static VARCHAR,ip_view VARCHAR,ip_lan VARCHAR,ip_wan VARCHAR,ip_gateway VARCHAR,ip_router VARCHAR,num_of_computer VARCHAR,vlan VARCHAR,up_link VARCHAR,private_ip VARCHAR,pay_type VARCHAR,update_number_1 VARCHAR,reg_type_id VARCHAR,type VARCHAR,update_number VARCHAR) \
WITH (KAFKA_TOPIC='SUBSCRIBER_KEYED', VALUE_FORMAT='JSON', KEY = 'sub_id' );

现在，当您向 发送消息时subscriber，即使它没有键入，该表也可以工作：

ksql> select * from subscriber_table;
1528369407576 | 1083168000 | 1083168000 |  | 10922428129 |  | 2 | 2046573688 | 452049760887694 | 8984049767000887694 | 2 | HPN03 | 400001035 | 000 | 20090511152847 | 20090511152102 |  | 0 | 0 | 1000405100 |  |  |  |  | 20090511152102 | TUDV_POPBGG | 20170801171355 | MIGRATE |  |  |  | MIGRATE |  | 100000 | 1 |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  | 2 | 1 | 5131615 | null | null
于 2018-06-07T11:04:17.730 回答