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Documentation Changes:
Needed
Documentation Changes Summary:

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1. What would you like to communicate to the user about this feature?

See the PR description: https://github.com/mongodb/mongoid/pull/6138

2. Would you like the user to see examples of the syntax and/or executable code and its output?
3. Which versions of the driver/connector does this apply to?

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1. What would you like to communicate to the user about this feature? See the PR description: https://github.com/mongodb/mongoid/pull/6138 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?

Rails 6.1 introduced the following behavior in ActiveRecord:

Avoid making query when using `where(attr: [])`
https://github.com/rails/rails/pull/37266

Mongoid should implement something similar. For example, the following queries are guaranteed never to return any results:

Users.any_in(name: [])
Users.where(name: 'Bob').where(name: 'Joe')

Such code should return a Mongoid::Criteria but calling .to_a on that criteria returns [] without generating a DB query.

is depended on by

MONGOID-5309 Remove deprecated Object#blank_criteria? method

related to

MONGOID-5022 Omit $or operator when it has only one condition

SERVER-79088 Improve SBE multi-planner performance for query which returns zero results