Prefix and postfix query

What I want to do

Can it support the like operation like a relational database to achieve the matching of prefixes and suffixes?

Dgraph metadata

dgraph version
Dgraph version   : v20.11.2
Dgraph codename  : tchalla-2
Commit timestamp : 2021-02-23 13:07:17 +0530
Branch           : HEAD
Go version       : go1.15.5
jemalloc enabled : true

Dgraph supports regular expressions, full-text and fuzzy matching.

Thank you for your reminder. There are two problems when I use regular expression matching here. I would like to trouble you to take a look.
First, when you use double quotation marks to include parameters, you will be prompted that the parameters are abnormal. Is this normal?

Second, when it contains two characters to match, it prompts that the matching range is too large. Can this be adjusted, or what is the specific logic for judging the range too large?