Does TTL in Document DB (Cosmos DB) affect to index?

Question

I am using Document DB. In previous days, I changed index of database and receive some "Not found document" error due to index transformation. I also plan to enable TimeToLive features of document DB but Azure alert:

Changing the TTL or Indexing Policy impacts query results while the index transformation occurs

If TTL is enabled, will "Not found document" or other negative impact happen again ?

Answer 1

Yes! Please see the following: Indexing policies and TTL

The Time-to-Live (TTL) feature requires indexing to be active on the container it is turned on. This means that:

• it is not possible to activate TTL on a container where the indexing mode is set to None,
• it is not possible to set the indexing mode to None on a container where TTL is activated.

For scenarios where no property path needs to be indexed, but TTL is required, you can use an indexing policy with:

• an indexing mode set to Consistent, and
• no included path, and
• /* as the only excluded path.