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Tableau

Definition

Tableau is a commercial business-intelligence / dashboarding tool (now part of Salesforce) widely deployed as a SQL-query client against data warehouses and lakehouses.

Role in this wiki

Tableau appears primarily as the canonical BI-query client whose workload shape (low per-query complexity, high concurrency, heavy metadata-query traffic for health checks) justifies a dedicated BI-cluster tier behind a query gateway.

Named explicitly as one of the two BI tools whose queries Trino Gateway routing rules detect (via the X-Trino-Source HTTP header) and redirect to BI-optimised Trino clusters (sources/2026-03-24-expedia-operating-trino-at-scale-with-trino-gateway):

condition: 'request.getHeader("X-Trino-Source") contains "Tableau" || request.getHeader("X-Trino-Source") contains "Looker"' actions: - 'result.put("routingGroup", "gateway-bi")'

Tableau's workload is also the source of much metadata-query load (repeated select version() / show catalogs health checks on cluster connection), which is the motivating example for Expedia's metadata-cluster routing rule.

Seen in

• sources/2026-03-24-expedia-operating-trino-at-scale-with-trino-gateway — named as a BI tool whose queries are routed to a BI-optimised Trino cluster via source-header-based routing.

Related

• systems/looker — the other named BI tool in the same post.
• systems/trino — a common SQL-engine backend for Tableau.
• systems/trino-gateway — routes Tableau queries to BI clusters via X-Trino-Source header inspection.