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Open-source streaming SQL engine written in Rust using Apache Arrow and DataFusion. Supports continuous queries, temporal stream joins, tumbling/session windows, and CDC/Kafka connectors. Lightweight, embeddable, and sub-microsecond latency

38 starsRust

LaminarDB – Streaming SQL database in Rust, zero-alloc hot path

by sujitn·Feb 18, 2026·6 points·1 comment
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AI Analysis

●●●BangerWizardryNiche GemSolve My Problem

Sub-microsecond streaming SQL via zero-alloc hot path; genuine advancement over SQLite+DataFusion.

Strengths
  • •Zero-allocation hot path in Rust is real performance engineering: measurable microsecond latency beats general-purpose databases by orders of magnitude
  • •Complete ecosystem: Kafka/CDC connectors, WAL, checkpointing, Python bindings, and derived macros—production-ready for the constraint
  • •Arrow + DataFusion foundation gives SQL compatibility and columnar efficiency without reinventing the wheel
Weaknesses
  • •Niche audience limits impact: financial/IoT engineers already use specialized streaming DBs (Kdb+, ClickHouse); embedded Rust requirement excludes most users
  • •Early adoption risk: 31 GitHub stars, unclear real-world production deployments or case studies vs. incumbent alternatives
Category
Data
Target Audience

Fintech engineers, IoT backend developers, real-time analytics teams needing edge-deployed databases

Similar To

SQLite (embedded) · ClickHouse (streaming SQL) · Kdb+ (financial timeseries)

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