February 2022 Summaries

ClickHouse version 22.2 introduces several significant features and improvements, including projections that allow multiple data representations in a single table, control over file creation and rewriting on data export, custom deduplication tokens, DEFAULT keyword for INSERT statements, EPHEMERAL columns, improvements for multi-disk configuration, flexible memory limits, shell-style comments in SQL, and numerous performance optimizations. These features are designed to enhance the performance, flexibility, and scalability of ClickHouse, making it an attractive option for data analysis and management tasks.

ClickHouse is an open-source relational database management system designed for analytical workloads and big data storage. It's used by Opensee, a financial technology company that provides real-time self-service analytics solutions to financial institutions. The platform allows business users to directly harness 100% of their vast quantities of data instantly and on demand, with no size limitations. Opensee leverages ClickHouse's capacity to handle huge volumes of data and provide fast response times without compromising scalability, granularity, speed, or cost control. The company has developed a low-code API that abstracts complexity and provides simple business queries optimized for performance. Opensee also offers various front-end options to interact with the data, navigate through the cube, and leverage functionality like data versioning. The platform's advantages include its distributed and replicated architecture, wide range of features, format support, rapid evolution through community contributions, and cost efficiency factor that divides hardware costs by 10 or more.

ClickHouse has released several new features and improvements across 12 monthly releases, including ClickHouse Keeper as an alternative to Apache ZooKeeper, asynchronous insert mode, user-defined functions (UDF), new data types such as Map and UInt128, and positional arguments. The team also announced their next release v22.2, which will include text classification functions and flexible memory limits. Additionally, the Query of the Month highlights how users can search all columns of a table at once using various options that utilize features like formatRow, concat, and arrayExists. The ClickHouse community is encouraged to share their interesting queries on Twitter, while reading corner articles feature recent adoption stories, benchmarking results, and insights into ClickHouse's engineering culture.