How do B+ Tree text (username, email) indexes work

All we need is an easy explanation of the problem, so here it is.

From my understanding, MongoDB uses a B+ Tree for indexes, including for unique fields such as emails and usernames.

However, I don’t understand how a string value such as an email or username gets converted to a numeric format (that can be sorted with ascending, descending).

Can anyone help me understand? Are the string values getting converted to numbers? How is a B+ Tree done per character?

Any examples or resources to read on would be great. (I am trying to implement some kind of B+ Tree that can support indexing of usernames

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

Back to answer my own question:

Apparently, you can just compare strings using greater than & less than operators, which I was unaware of.

For example, in JavaScript:

How do B+ Tree text (username, email) indexes work

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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