Google Spanner gains multi-model capabilities to power AI agents

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Google Cloud is positioning its Spanner database as a unified "context engine" for the agentic era, combining relational, vector, graph, key-value, and full-text search data within a single ACID-compliant architecture. The pitch to agent builders is that AI agents need to simultaneously query structured history, semantic meaning (via vector search for RAG — retrieval-augmented generation, where agents pull relevant context before answering), and relationship graphs, all in one SQL statement rather than stitching together separate databases.

New additions include Spanner Graph (built on the ISO GQL standard), vector indexes supporting over 10 billion entries powered by Google's ScaNN algorithm (used internally in Google Search and YouTube), a columnar engine claimed to run analytical queries up to 200× faster on live operational data, and Spanner Omni — a containerized, Kubernetes-deployable version that runs on-prem, on AWS, or on Azure. Google also highlights integration with BigQuery and the Gemini Enterprise Agent Platform for cross-stack agent orchestration, framing Spanner as a foundational pillar of its broader "Agentic Data Cloud."