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BSONRegExp() (mongosh method)

Definition

Creates a new BSON type for a regular expression.

BSONRegExp has the following syntax:

BSONRegExp("<pattern>, "<flags>")

Parameter	Type	Description
`pattern`	string	The regular expression pattern. You must not wrap the pattern with delimiter characters.
`flag`	string	The regular expression flags. Characters in this argument are sorted alphabetically.

Use the BSONRegExp() constructor to create the BSON regular expression.

var bsonRegExp = BSONRegExp("(?-i)AA_", "i")

Insert the object into the testbson collection.

db.testbson.insertOne( { foo: bsonRegExp } )

Query the testbson collection for the inserted document.

db.testbson.find( {}, {}, { bsonRegExp: true } )

You can see the binary BSON regular expressions stored in the collection.

[
  {
    _id: ObjectId('65e8ba8a4b3c33a76e6cacca'),
    foo: BSONRegExp('(?-i)AA_', 'i')
  }
]

If you set bsonRegExp to false, mongosh returns an error:

db.testbson.find( {}, {}, { bsonRegExp: false })

Uncaught:
SyntaxError: Invalid regular expression: /(?-i)AA_/i: Invalid group

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