Services or capabilities described in AWS documentation might vary by Region. To see the differences applicable to the AWS European Sovereign Cloud Region, see the AWS European Sovereign Cloud User Guide.$bitAnd
New from version 8.0.1.
The $bitAnd operator in Amazon DocumentDB performs a bitwise AND operation on integer or long values.
Parameters
Example (MongoDB Shell)
The following example demonstrates how to use the $bitAnd operator to perform bitwise AND on two fields.
Create sample documents
db.flags.insertMany([
{_id: 1, a: 13, b: 10},
{_id: 2, a: 7, b: 5},
{_id: 3, a: 15, b: 9}
]);
Query example
db.flags.aggregate([
{ $project: { result: { $bitAnd: ["$a", "$b"] } } }
]);
Output
[
{_id: 1, result: 8},
{_id: 2, result: 5},
{_id: 3, result: 9}
]
In binary: 13 (1101) AND 10 (1010) = 8 (1000); 7 (0111) AND 5 (0101) = 5 (0101); 15 (1111) AND 9 (1001) = 9 (1001).
Code examples
To view a code example for using the $bitAnd operator, choose the tab for the language that you want to use:
- Node.js
-
const { MongoClient } = require('mongodb');
async function example() {
const client = new MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
try {
await client.connect();
const db = client.db('test');
const collection = db.collection('flags');
const result = await collection.aggregate([
{ $project: { result: { $bitAnd: ["$a", "$b"] } } }
]).toArray();
console.log(result);
} finally {
await client.close();
}
}
example();
- Python
-
from pymongo import MongoClient
def example():
client = MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false')
try:
db = client['test']
collection = db['flags']
result = list(collection.aggregate([
{'$project': {'result': {'$bitAnd': ['$a', '$b']}}}
]))
print(result)
finally:
client.close()
example()