February 2026 ClickStack update covers multiple improvements across Cloud and open source. Key additions include ClickStack resources in the ClickHouse Cloud OpenAPI for configuration-as-code workflows, an embedded ClickStack UI shipped directly in the ClickHouse binary for local development, and a new SQL mode for table visualizations enabling raw queries with joins and derived metrics. Metrics exploration is improved with an attributes panel showing available labels per metric. Pie charts are now supported across traces, logs, and OTel metrics. Several ClickHouse query performance optimizations are now automatically applied, including skip-index-driven Top-K filtering (2-3x gains on log searches), streaming secondary index evaluation (4x+ on LIMIT queries), disjunction pruning, and lazy materialization with an increased threshold of 100,000 rows. Alerting is extended to number chart tiles for threshold-based alerts.

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New contributors #External API for ClickHouse Cloud #ClickStack embedded in ClickHouse #Raw SQL tables #Metric Attribute Explorer #Pie charts #Settings for even faster querying #Alerts on number charts #

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