Reference#

Complete API and protocol reference for RelataDB.

In this section#

Query languages

• SQL Reference — full SQL grammar, operators, and temporal extensions
• Cypher & SQL-PGQ — graph pattern matching over the link store
• SPARQL — RDF-style triple queries over the knowledge graph
• GraphQL — GraphQL query subset with server-side variable binding
• Graph Analytics — GDS-style algorithms (PageRank, communities, paths)
• Query Cookbook — worked recipes across the query surface

Retrieval & time

• Search & Retrieval — BM25 full-text, vector, and hybrid search
• Vector Index Parameters — HNSW/DiskANN/IVF tuning knobs
• Bi-temporal Queries — AS OF valid-time and system-time queries
• Branching & Namespaces — isolated query/write branches
• Agent Memory — memory verbs for AI agents

Platform

• HTTP API — the full REST route table
• MCP — Model Context Protocol tools and memory verbs
• Protocols — Postgres wire, gRPC, Arrow Flight, S3, Redis, Mongo, ClickHouse, Neo4j
• Error Codes — typed errors and RFC 9457 problem details
• Environment Variables — all configuration knobs
• Limits — the honest, code-verified picture of what works
• Performance Tuning — caches, spill, and query budgets
• Licensing & Tiers — feature gating by license