Pg_ClickHouse: A Postgres extension for querying ClickHouse (clickhouse.com)

The announcement of pg_clickhouse, a new PostgreSQL extension, aims to streamline the migration of analytical queries from PostgreSQL to ClickHouse, facilitating a smoother transition for organizations seeking enhanced database performance. This tool addresses a key pain point in analytics workload migration; while data movement is efficiently managed with ClickPipes, the complexities of rewriting years’ worth of existing SQL queries pose significant challenges to developers. By allowing unmodified PostgreSQL queries to execute directly against ClickHouse, pg_clickhouse significantly reduces the time and effort required for users to adapt their applications. This extension leverages foreign data wrappers (FDWs) to enable ClickHouse query execution while maintaining the familiar structure of existing PostgreSQL queries. It introduces advanced features such as transparent aggregate function pushdowns and SEMI JOIN pushdown, optimizing query performance by minimizing data transfer back to PostgreSQL. With pg_clickhouse, organizations can benefit from the high-performance analytics capabilities of ClickHouse without extensive reconfiguration, thus supporting the growing demand for real-time data processing in increasingly data-intensive environments.