Shiny.DocumentDb v3 — One API, Four Databases | Community Feed

What started as a simple SQLite document store now runs on four database engines. Shiny.DocumentDb v3 introduces a provider abstraction that lets you swap between SQLite, MySQL, SQL Server, and PostgreSQL while keeping your entire data layer — queries, projections, indexes, transactions — completely identical.

What you’ll learn

How the IDatabaseProvider interface enables backend-agnostic document storage
How the fluent query builder translates LINQ expressions into the correct SQL dialect per provider (json_extract, JSON_VALUE, jsonb operators, etc.)
Per-provider DI extension methods for quick registration
Why multiple database support matters: server-side caches, team standardization, prototyping-to-production transitions
Migration steps from Shiny.SqliteDocumentDb v2 to the new package structure
Everything that carries forward: streaming, JSON indexes, table-per-type, diffing, batch insert, AOT support