Cosmosdb

Originally posted on https://devblogs.microsoft.com/cosmosdb/partial-document-update-ga/

We’re excited to announce the general availability of partial document update for the Azure Cosmos DB Core (SQL) API, which was announced at Microsoft Ignite! This new feature makes it possible to perform path-level updates to specific fields/properties in a single document without needing to perform a full document read-replace operation. Partial document update is currently supported in Azure Cosmos DB .NET SDK, Java SDK, Node SDK, and stored procedures.

Document updates – then and now

To put things in context, here is a refresher on how one would typically use a document replace operation: Read the document, update it locally (client side) including any optimistic concurrency control (OCC) checks if necessary and, finally call the replace operation along with the updated document.

This blog post provides a quick overview and demo of how you can use the Azure Cosmos DB Linux Emulator on Docker (in preview at the time of writing) along with Visual Studio Code in order to enhance your local development experience.

Since the Azure Cosmos DB Linux Emulator is readily available as a Docker image (simply docker pull mcr.microsoft.com/cosmosdb/linux/azure-cosmos-emulator), it’s easy to incorporate it within your existing setup. For instance, it could be in a docker-compose file as a part of a larger stack (here is an example of how to use it with Apache Kafka). However, complementing it with the Visual Studio Code Remote - Containers extension, gives you the ability to leverage a Docker container as a full-fledged development environment.