How do I patch a large JSON document in Cosmos (something similar to T-SQL UPDATE) ?

Is your feature request related to a problem? Please describe. I have a Cosmos database with hundreds of documents and each document is over 2 KB. We have added a new application feature and as a result of which there is a need to update a certain fragment in the JSON or add a new fragment to the JSON.

Scenario 1- Update

In the following example, I would like to update the city of all records from LDN to LONDON

{
 "firstname":"John",
 "lastname":"Doe",
 "city":"LDN"
}

Scenario 2 - Add new fields

In the following example, I would like to insert the country field to all records to GB and region to 'WEST EUROPE`

{
 "firstname":"John",
 "lastname":"Doe",
 "city":"LDN",
 "country":"GB",
 "region":"WEST EUROPE"
}

Describe the solution you’d like Something similar on the lines of T-SQL but relevant for JSON. E.g.

update Customers c where c.city="London" set "$.country="GB" , set "$.region="WEST EUROPE"

Describe alternatives you’ve considered I have had to write C# code on a case by case basis. In my code, I am having to deal with the JSON manipulation. This has become very burdensome when compared with how easy such a scenario would have been in the MSSQL world.

[stuartleeks]

What is the ETA for this feature being publicly available?

[iamalexmang]

@ealsur, since #1616 is merged, do we now have patch support working? And if so… how does it work?