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20 October 2020

Tutorial on querying live streams of data with Flink SQL

Real time data querying is becoming a modern standard. Who wants to wait until the next day or week when needing to take decision now? Apache Flink SQL is an engine now offering SQL on bounded/unbounded streams of data. The streams can come from various sources and here we picked the popular Apache Kafka. This tutorial is based on the great Flink SQL demo Building an End-to-End Streaming Application but focuses on the end user querying experience.…

4 minutes read - Querying / Tutorial / Version 4.9

20 October 2020

Tutorial on querying live streams of data with ksql (Kafka SQL)

Real time data querying is becoming a modern standard. Who wants to wait until the next day or week when needing to take decision now? The stream of data comes from an Apache Kafka topic which can be queried via ksqlDB. Components To keep things simple, all the pieces have been put together in a “one-click” Docker Compose project which contains: ksqlDB from the ksqlDB quickstart A Hue Editor already configured with the ksqlDB Editor One-line setup For fetching the configurations and starting everything:…

3 minutes read - Querying / Tutorial / Version 4.9

30 September 2020

Quick checking Hue's SQL Editor connections to Databases in Kubernetes

Let's see one way to quickly check why Hue can't connect to a SQL Database in the Kubernetes world. We previously documented how to run Hue in Kubernetes or Docker. The concept is to use the Database specific command shell on the command line to try to send some queries. Apache Hive is the Data Warehouse used as example (but this would work the same with psql, mysql, …) or any other Database Hue can connect to.…

2 minutes read - Administration / Version 4.9

More recent stories

20 October 2020
Tutorial on querying live streams of data with Flink SQL
Read More
20 October 2020
Tutorial on querying live streams of data with ksql (Kafka SQL)
Read More
30 September 2020
Quick checking Hue's SQL Editor connections to Databases in Kubernetes
Read More