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ClickHouse as a streaming HTTP API
ClickHouse 26.8 now allows developers to expose SQL queries as streaming HTTP endpoints directly from the database without requiring an intermediate API service.
What: ClickHouse 26.8 introduced native `CREATE HANDLER` support, allowing users to define URL-based endpoints that execute specific SQL queries. It supports typed parameters, result filtering, sorting, and pagination directly through HTTP.
Why it matters: This feature reduces architectural complexity for read-heavy data applications by eliminating the boilerplate 'pass-through' microservice layer typically required to serve database results over HTTP.
Takeaway: Upgrade to ClickHouse 26.8 and move your simple read-only SQL APIs into the database itself to improve latency and simplify maintenance.
Decoder
- Streaming HTTP API: An API that transmits data as a continuous flow, allowing the client to process partial results without waiting for the full response.
- Named Handler: A persistent database object that maps a URL route to a defined SQL query execution.
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