SharpCoreDB

High-Performance Encrypted Database for .NET 10
Embedded engine + production gRPC server in one ecosystem

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SharpCoreDB is for .NET teams that want SQLite-like simplicity, enterprise-grade security, and server-scale capabilities without leaving the .NET ecosystem.

Use it when you need:

• Fast embedded storage with AES-256-GCM encryption and ACID guarantees
• A secure network database via gRPC (HTTP/2 + HTTP/3)
• Built-in vector search, advanced analytics, and GraphRAG/graph algorithms A production-focused stack validated by 2,223 tests and backward compatibility

Full documentation: docs/INDEX.md

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🖥️ Looking for the graphical UI? The SharpCoreDB.Viewer / SharpCoreDB.WebViewer projects have moved to the standalone repo MPCoreDeveloper/SCDMS. This repository now contains only the engine, providers, and server. See docs/SCDMS.md.

Why SharpCoreDB?

• One stack, two deployment models: embedded and server mode
• Performance-first design: SIMD acceleration, memory pooling, optimized query paths
• Security by default: TLS 1.2+, JWT, optional mTLS, RBAC, encrypted single-file storage
• Modern .NET 10-native: C# 14, optional ecosystem packages, production-ready modules

Quick comparison

Capability	SharpCoreDB	LiteDB	SQLite	RavenDB / MongoDB
.NET-native embedded experience	✅ First-class	✅	⚠️ via provider wrappers	❌ network-first
Built-in encrypted single-file DB (AES-256-GCM)	✅	⚠️ limited/variant approaches	❌ (extensions/custom setup)	❌
Built-in gRPC server mode in same ecosystem	✅	❌	❌	⚠️ different server architecture
Vector search + GraphRAG tooling	✅	❌	⚠️ extension-dependent	⚠️ feature varies by product/tier
Advanced analytics + SIMD focus	✅	⚠️ basic querying	⚠️ strong SQL, fewer .NET-specific SIMD paths	⚠️ server-side analytics patterns
Optional Event Sourcing / CQRS packages	✅	❌	❌	⚠️ usually external patterns

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Quick Start (under 30 seconds)

1) Embedded mode

dotnet add package SharpCoreDB --version 1.9.6

using SharpCoreDB;

var db = new Database("app.scdb");
db.ExecuteSQL("CREATE TABLE Users (Id INT, Name TEXT)");
db.ExecuteBatchSQL([
    "INSERT INTO Users VALUES (1, 'Ada')",
    "INSERT INTO Users VALUES (2, 'Linus')"
]);
db.Flush();
db.ForceSave();

2) Server mode (gRPC-first)

dotnet run --project src/SharpCoreDB.Server -c Release

Health endpoint: https://localhost:8443/health
gRPC endpoint: https://localhost:5001

Install client/server packages:

dotnet add package SharpCoreDB.Server --version 1.9.6
dotnet add package SharpCoreDB.Client --version 1.9.6

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v1.9.1 highlights (previous release)

• Entity Framework Core Provider: Full Guid-keyed entity CRUD support with reliable two-query pattern for relationships
• New EF Core Demo: Runnable console app (Examples/SharpCoreDB.EFCoreCrudDemo) demonstrating complete company/vacancy CRUD workflow
• Version standardization to 1.9.1 across all packages, NuGet metadata, and documentation
• EF Core provider fully validated: 22/22 integration tests passing (CRUD, transactions, relationships, Guid entities)
• Build and core test suite confirmed stable for release
• Continued synchronization of optional modules (Event Sourcing, CQRS, Projections, Analytics)
  • no UndefinedDefaultValue leakage in generated SQL
  • no duplicate PRIMARY KEY generation for version table creation
  • SQLite-incompatible DDL now fails fast with clear NotSupportedException in default compatibility mode
• Single-file parser compatibility fixes: quoted identifiers in CREATE TABLE / DROP TABLE / table-level PK paths are covered and validated
• Microsoft.Extensions.Logging.Abstractions updated to 10.0.7 across all packages
• 2,000+ tests passing, zero breaking changes intended, 100% backward compatible

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v1.9.6 release (current)

• Fixed a critical WHERE col IN (...) regression (Issue #339): IN / NOT IN filters were silently ignored (returning ALL rows) because the predicate evaluators did not recognize the IN operator. Fixed in every evaluation path — single-file (.scdb) and directory storage modes, string and non-string columns, literal and parameterized lists. Single-file parameterized queries (IN (@p0, @p1)) also no longer throw "Missing required parameter" (parameter-key normalization now routes through ParameterBinder.Bind).
• Now continuously analyzed on SonarCloud 🎉: quality gate, bug, vulnerability and code-smell tracking are part of the normal workflow from this release onward — see the SonarCloud dashboard.
• Tests: full suite passes — 2,404 tests, 0 failures across all 15 test projects, plus 16 JS and 17 Python tests — including new regression tests for IN / NOT IN (literal + parameterized) in WhereInRegressionTests and WhereInRegressionEfCoreTests.
• 100% backward compatible with the v1.9.5 release line.

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v1.9.5 release

• Full version synchronization to 1.9.5 across all packages (core, Server, Client, Analytics, VectorSearch, Graph, EF Core provider, Identity, EventSourcing, Projections, CQRS, Functional family including the new SharpCoreDB.Functional.Linq2DB, and more), internal project references, PackageReleaseNotes, and test projects.
• Bug fixes:
  • Parameterized INSERT bound values to the wrong columns (Issue #336): named-parameter binding is now token-aware, so a parameter name that is a prefix of another (e.g. @t vs @tid) no longer corrupts the longer placeholder.
  • SharpCoreDB.Server dropped request.Parameters (Issue #337): parameters are now forwarded on the gRPC ExecuteQuery/ExecuteNonQuery, the binary (PostgreSQL) protocol and the WebSocket handler.
  • ULID encoding is now standards-compliant: the Crockford Base32 encoder/decoder follows the ULID specification (first character carries 3 significant bits), so generated ULIDs are interchangeable with Python/Java/Go implementations; decoding rejects values above the 128-bit range and timestamps above 2^48−1 are rejected. (Note: ULIDs generated before 1.9.5 are not spec-compliant; this mirrors the posseth.global.ulid v2.0.0 fix.) Upgrade path: use Ulid.FromLegacy(string) / Ulid.TryFromLegacy(...) to convert pre-1.9.5 ULIDs to the current encoding — the 128-bit value (timestamp + randomness) is preserved exactly, so existing _rowid values and ULID columns can be migrated one-to-one. Legacy databases are detected automatically: Database.NeedsLegacyUlidMigration() reports whether a database was created before 1.9.5 (the ULID encoding generation is recorded in the database metadata for directory mode and in the file-header feature flags for single-file .scdb mode), and Database.MigrateLegacyUlids() rewrites every ULID value in every ULID-typed column of every table (including hidden _rowid primary keys) and permanently marks the database as migrated. Run it once right after upgrading, before writing new rows.
• UI moved to SCDMS: the graphical UI (formerly SharpCoreDB.Viewer / SharpCoreDB.WebViewer) has moved to the standalone repo MPCoreDeveloper/SCDMS; this repository now contains only the engine, providers and server. See docs/SCDMS.md.
• Documentation is now English-only and updated to the 1.9.5 state (root README, package READMEs/NuGet.README.md files, USAGE guides, script client docs for Python/JS, hub files and the changelog).
• NuGet dependencies updated to their latest stable versions (Aspire 13.5.3, AWSSDK.Core, BLite, MessagePack, EF Core InMemory 10.0.11, Aspire.AppHost.Sdk 13.5.3); unused Avalonia-related package pins from the removed viewer were deleted.
• Tests: the full test suite passes — 2,491 tests, 0 failures — including new regression tests for parameter binding, server parameter pass-through, ULID specification compatibility and the automatic legacy-ULID migration.
• Changes from 1.9.1 to 1.9.5 (including the above bug resolutions, dependency updates, and documentation overhaul) are detailed in this section and docs/CHANGELOG.md.
• 100% backward compatible with the exception of ULID strings generated before 1.9.5 (see the ULID note above).

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Performance snapshot

Recent benchmark improvements after parser/lifecycle refactors:

Benchmark	Before	After	Improvement
Single-File SELECT (Unencrypted)	4.01 ms	1.81 ms	55% faster
Single-File SELECT (Encrypted)	2.74 ms	1.57 ms	43% faster
AppendOnly UPDATE	143.42 ms	70.36 ms	51% faster
Dir Encrypted UPDATE	9.16 ms	7.91 ms	14% faster

Additional SIMD optimization: columnar aggregate paths now use Vector256.LoadUnsafe to reduce per-iteration overhead in AVX2 hot loops.

Full benchmark details: docs/BENCHMARK_RESULTS.md

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Complete feature set

Core database engine (embedded)

• Single-file encrypted database with AES-256-GCM
• SQL support with advanced query optimization
• ACID transactions with WAL
• B-tree and hash indexing
• Full-text search
• SIMD-accelerated operations (including Vector256.LoadUnsafe optimizations)
• Memory pooling and JIT-oriented performance optimizations
• Metadata durability improvements (flush + reopen reliability)

Network server (SharpCoreDB.Server)

• Primary protocol: gRPC over HTTPS (HTTP/2 + HTTP/3)
• Secondary protocols: Binary TCP handler, HTTPS REST API, WebSocket streaming
• Multi-database hosting with system databases
• Security stack: TLS 1.2+, JWT auth, RBAC (Admin/Writer/Reader), optional mTLS
• Connection pooling (1000+ concurrent connections)
• Health checks and Prometheus-compatible metrics
• Graceful shutdown and production deployment support
• Deployment options: Docker/Docker Compose, Windows Service, Linux systemd, macOS launchd

Clients and SDKs

• .NET client library (SharpCoreDB.Client, ADO.NET-style)
• JavaScript/TypeScript SDK (npm)
• Python client (PySharpDB) with partial transport parity in progress

Analytics and query capabilities

• 100+ aggregate functions (COUNT, SUM, AVG, STDDEV, VARIANCE, PERCENTILE, CORRELATION)
• Window functions (ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD)
• Proven high-throughput analytics performance in benchmark suite

Vector search

• HNSW indexing with SIMD acceleration
• Production-tested with large vector workloads (10M+ vectors)
• Performance-oriented semantic retrieval workflows

Graph and GraphRAG

• Graph traversal: BFS, DFS, bidirectional search
• A* pathfinding improvements
• ROWREF data type support for graph edges
• GRAPH_TRAVERSE() SQL function integration
• Advanced graph analytics via SharpCoreDB.Graph.Advanced:
  • Community detection (Louvain, Label Propagation, Connected Components)
  • Centrality metrics (Degree, Betweenness, Closeness, Eigenvector, Clustering)
  • Subgraph analysis (K-core, clique, triangle detection)
  • Graph-aware semantic ranking and profiling helpers

Distributed and sync features

• Multi-master replication with vector clocks
• Distributed transactions with 2PC protocol
• Dotmim.Sync integration for cloud/data sync scenarios

Event Sourcing, Projections, and CQRS (optional packages)

• SharpCoreDB.EventSourcing:
  • Append-only per-stream event storage
  • Global ordered event feed
  • In-memory and persistent event store implementations
  • Snapshot persistence and snapshot-aware aggregate loading
  • Optional snapshot policy helpers
• SharpCoreDB.Projections:
  • Projection registration and runner scaffolding
  • Checkpoint persistence
  • OpenTelemetry-ready projection metrics
• SharpCoreDB.CQRS:
  • Command/handler abstractions
  • Aggregate root support
  • Outbox primitives with retry/dead-letter workflow support

Quality and compatibility

• 2,223 tests passing
• 100% backward compatible across the v1.9.5 release line
• Zero breaking changes intended from v1.5.0 to v1.9.6

For deep technical details (audit reports, threat model, runbooks, compatibility matrices), use the docs hub: docs/INDEX.md.

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Available NuGet packages (v1.9.6)

# Core
dotnet add package SharpCoreDB --version 1.9.6

# Server/client
dotnet add package SharpCoreDB.Server --version 1.9.6
dotnet add package SharpCoreDB.Client --version 1.9.6

# Engines and extensions
dotnet add package SharpCoreDB.Analytics --version 1.9.6
dotnet add package SharpCoreDB.VectorSearch --version 1.9.6
dotnet add package SharpCoreDB.Graph --version 1.9.6
dotnet add package SharpCoreDB.Graph.Advanced --version 1.9.6
dotnet add package SharpCoreDB.Distributed --version 1.9.6
dotnet add package SharpCoreDB.Provider.Sync --version 1.9.6
dotnet add package SharpCoreDB.EntityFrameworkCore --version 1.9.6
dotnet add package SharpCoreDB.Extensions --version 1.9.6

# Optional architecture packages
dotnet add package SharpCoreDB.EventSourcing --version 1.9.6
dotnet add package SharpCoreDB.Projections --version 1.9.6
dotnet add package SharpCoreDB.CQRS --version 1.9.6

# Optional functional adapters
dotnet add package SharpCoreDB.Functional --version 1.9.6
dotnet add package SharpCoreDB.Functional.Dapper --version 1.9.6
dotnet add package SharpCoreDB.Functional.EntityFrameworkCore --version 1.9.6
dotnet add package SharpCoreDB.Functional.Linq2DB --version 1.9.6

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What’s new in v1.9.1 (prior release)

• Entity Framework Core Provider: Full Guid-keyed entity support with stable CRUD (insert/update/select/delete) and reliable two-query relationship materialization pattern for Company/Vacancy style scenarios
• New runnable EF Core demo: Examples/SharpCoreDB.EFCoreCrudDemo – complete console application demonstrating end-to-end CRUD on the companies/vacancies seed dataset using the recommended repository pattern
• Complete v1.9.1 release alignment: Every project <Version>, every internal PackageReference, and every PackageReleaseNotes updated to 1.9.1 across 25+ packages so NuGet pack/publish produces correct artifacts
• Documentation standardization: Root README.md + all 25 component README.md files updated to current release with correct package examples and highlights
• EF Core integration tests: 22/22 passing (including full end-to-end seed CRUD with Guid primary keys and relationships)
• All builds and test packages validated (SharpCoreDB.1.9.1.nupkg successfully produced)
• Zero breaking changes – 100% backward compatible with previous 1.9.x line

For changes in the current 1.9.6 release (critical WHERE IN regression fix, SonarCloud onboarding, version bump), see the v1.9.6 section above and docs/CHANGELOG.md.

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Important documentation links

• Roadmap: ROADMAP.md — shipped features, near-term plans, and long-term vision
• Documentation hub: docs/INDEX.md
• Project docs index: docs/README.md
• Feature matrix: docs/FEATURE_MATRIX_v1.7.2.md
• Server docs: docs/server/README.md
• Server quick start: docs/server/QUICKSTART.md
• GraphRAG docs: docs/graphrag/00_START_HERE.md
• SQL dialect extensions: docs/sql/SQL_DIALECT_EXTENSIONS_v1.7.2.md
• Migration docs: docs/migration/README.md
• Single-file SQL support and limits: docs/storage/SINGLE_FILE_SQL_LIMITATIONS.md
• EF Core provider docs: src/SharpCoreDB.EntityFrameworkCore/README.md, src/SharpCoreDB.EntityFrameworkCore/USAGE.md
• New in v1.9.5: SharpCoreDB.Functional.Linq2DB — production-ready linq2db adapter with Option<T>/Fin<T>/Seq<T> APIs, BulkCopyAsync batching, full type mapping (ULID/GUID/DateTime), and compile-time safe LINQ queries. Ideal for high-throughput AI/agentic and GraphRAG workloads. See src/SharpCoreDB.Functional.Linq2DB/README.md.
• Optional architecture packages: src/SharpCoreDB.EventSourcing/README.md, src/SharpCoreDB.Projections/README.md, src/SharpCoreDB.CQRS/README.md
• Package publish/readme guidance: nuget/README.md, NuGet.README.md

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Contributing

Contributions are welcome. Please open an issue for ideas, bug reports, and feature proposals, or submit a PR directly.

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License

This project is licensed under the MIT License. See LICENSE for details.

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