How to use $strLenCP Operator In MongoDB
The $strLenCP
operator in MongoDB is used to calculate the length of a string in code points. It returns the number of UTF-8 code points in the specified string. This operator is useful for calculating the length of string fields in documents and allowing for various data processing and querying tasks.
Example: Calculating String Length with $strLenCP
To calculate the length of the name field using the $strLenCP operator, use the following query in the MongoDB shell:
// Calculate string length using $strLenCP
db.products.aggregate([
{
$project: {
name: 1,
nameLength: { $strLenCP: "$name" }
}
}
]);
Output:
[
{
_id: ObjectId('662609de9fe21c773b8bf20c'),
name: 'Smartphone',
nameLength: 10
},
{
_id: ObjectId('662609de9fe21c773b8bf20d'),
name: 'Laptop',
nameLength: 6
},
{
_id: ObjectId('662609de9fe21c773b8bf20e'),
name: 'Headphones',
nameLength: 10
},
{
_id: ObjectId('662609de9fe21c773b8bf20f'),
name: 'Tablet',
nameLength: 6
},
{
_id: ObjectId('662609de9fe21c773b8bf210'),
name: 'Smartwatch',
nameLength: 10
}
]
This MongoDB aggregation query uses the $strLenCP
operator to calculate the length of the name
field in each document of the products
collection. The $project
stage is used to include the original name
field along with a new nameLength
field containing the calculated length
How to Get String Length in MongoDB
In MongoDB, determining the length of a string stored in a document can be useful for various data processing tasks and queries. MongoDB provides operators and methods that allow us to calculate the length of strings efficiently.
In this article, we will explore how to get the string length in MongoDB by covering concepts, and examples in detail that will help us to manipulate and query string data in MongoDB.