Cosmos DB Provider

Non-relational provider with its own parallel query pipeline. Uses JSON for document materialization.

When to Use

• Working on Cosmos SQL generation
• Working on document storage, partition key configuration, or CosmosClientWrapper

Key Differences from Relational

• No migrations — use EnsureCreated()
• Documents as JSON — owned and complex types become embedded objects
• Partition key configuration required for performance
• ETag for optimistic concurrency
• No cross-container joins