Crate qdb_rs 

qdb-rs - Quantum Database

A hybrid quantum-classical database leveraging the QFT format for polynomial storage complexity and fault-tolerant error correction.

Table of Contents

1. Core Types - QDB, Entry, Key, Value
2. Storage Backends - Memory, Disk, Hybrid
3. Query Engine - Grover-inspired search, tensor contractions
4. Error Correction - Golay-protected persistence
5. Transactions - Quantum-aware ACID semantics

Architecture

┌─────────────────────────────────────────────────────────────┐
│                     QDB API Layer                           │
├─────────────────────────────────────────────────────────────┤
│  Key-Value API  │  Document API  │  Relational API          │
├─────────────────────────────────────────────────────────────┤
│                   Query Engine                              │
│  - Grover search (O(√N))                                    │
│  - Tensor contractions                                      │
│  - Variational optimization                                 │
├─────────────────────────────────────────────────────────────┤
│                   Storage Layer                             │
│  - QFT serialization (MPS tensors)                          │
│  - Golay error correction                                   │
│  - Adaptive bond dimension                                  │
├─────────────────────────────────────────────────────────────┤
│                   Backend Abstraction                       │
│  Memory  │  Disk  │  Distributed  │  Quantum Hardware       │
└─────────────────────────────────────────────────────────────┘

Re-exports

pub use entry::Entry;

pub use entry::EntryType;

pub use entry::Key;

pub use entry::Value;

pub use error::QdbError;

pub use error::Result;

pub use storage::Backend;

pub use storage::DiskBackend;

pub use storage::MemoryBackend;

pub use storage::QDB;

pub use storage::QdbConfig;

pub use storage::RadiationMode;

pub use vector::cosine_distance_fast;

pub use vector::euclidean_distance_squared;

pub use vector::DistanceMetric;

pub use vector::Embedding;

pub use vector::SearchResult;

pub use vector::VectorEntry;

pub use vector::VectorIndex;

pub use vector::VectorIndexConfig;

pub use vector::VectorStore;

pub use vector::VectorStoreConfig;

pub use vector::VectorStoreStats;

Modules

entry

Entry types for QDB - Key, Value, and Entry definitions

error

Error types for QDB operations

index

Indexing structures for QDB

prelude

Prelude for convenient imports

query

Query engine for QDB - Grover-inspired search and tensor operations

storage

Storage backends for QDB

transaction

Transaction support for QDB - Quantum-aware ACID semantics

vector

Vector Store for QDB - Quantum-Optimized Embedding Storage