ksql> describe cr7_topic_stream; Name : CR7_TOPIC_STREAM Field | Type --- ORDERAMOUNT | INTEGER ORDERID | INTEGER PRODUCTID | INTEGER PRODUCTNUM | INTEGER --- For runtime statistics and query details run: DESCRIBE EXTENDED <Stream,Table>; 将上EXTENDED参数查看详细信息: 代码语言:javascript...
最后,我希望通过拉查询输出下表中给定窗口的所有条目:SELECT QUERY_STRING, PRODUCT_ID, count(*) AS COUNTER但是显然,ksqlDB一次只能查询一个行键(在我的例子中是query+productId)。; 我的</e 浏览2提问于2019-12-10得票数 0 1回答 Kafka选择对表的KSQL查询不返回任何内容 、、 ---我的屏幕上什么都没有...
ksql> describe cr7_topic_stream; Name : CR7_TOPIC_STREAM Field | Type --- ORDERAMOUNT | INTEGER ORDERID | INTEGER PRODUCTID | INTEGER PRODUCTNUM | INTEGER --- For runtime statistics and query details run: DESCRIBE EXTENDED <Stream,Table>; 将上EXTENDED参数查看详细信息: ksql> describe extend...
Add EMIT CHANGES if you intended to issue a push query. 但是做些修改就可以正常运行 ksql> SELECT 'Hello, ' + USERNAME AS GREETING FROM users EMIT CHANGES; 有趣的是这个查询会一直进行,新开一个终端继续向users中插入新的username后原终端会蹦出新加入的username...
For runtime statistics and query details run: DESCRIBE EXTENDED <Stream,Table>; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 将上EXTENDED参数查看详细信息: AI检测代码解析 ksql> describe extended cr7_topic_stream; Name : CR7_TOPIC_STREAM ...
As the query contains no limit, it will continue to stream all results until terminated. Next, we subscribe to the results of the query in order to receive streaming data: public CompletableFuture<Void> subscribeOnAlerts(Subscriber<Row> subscriber) { return client.streamQuery(ALERTS_QUERY, ...
I have this test application, which succesfully creates a table (for a push query (not a CATS for pull-queries)) and then invoke the push query over the KSQLDB REST API, when invoked with main.py --createTables To replicate the problem, I have created: ...
In ksqlDB you can query from the beginning (SET 'auto.offset.reset' = 'earliest';) or end of a topic (SET 'auto.offset.reset' = 'latest';). You cannot currently (0.8.1 / CP 5.5) seek to an arbitrary ... Robin Moffatt
ksqlDB是事件流数据库,是一种特殊的数据库,基于Kafka的实时数据流处理引擎,提供了强大且易用的SQL交互方式来对Kafka数据流进行处理,而无需编写代码。KSQL具备高扩展、高弹性、容错式等优良特性,并且它提供了大范围的流式处理操作,比如数据过滤、转化、聚合、连接join、窗口化和 Sessionization (即捕获单一会话期间的...
Once we’ve created our real-time leaderboard using a new set of stateful operators, we will demonstrate how to query Kafka Streams for the latest leaderboard information using interactive queries. Our discussion of this feature will teach you how to build event-driven microservices with Kafka Stre...