AWS documentdb documentation change

Service: documentdb · 2026-03-31 · Documentation low

File: documentdb/latest/developerguide/rtrim.md

Summary

Added new documentation page for the $rtrim operator in Amazon DocumentDB, including syntax, parameters, MongoDB shell examples, and code examples in Node.js and Python

Security assessment

This change adds documentation for a new string manipulation operator ($rtrim) in DocumentDB. The code examples include TLS connection parameters (tls=true, tlsCAFile) which are standard security practices for database connections, but this is not the primary focus of the documentation. There is no evidence this addresses a specific security vulnerability or incident.

Diff

diff --git a/documentdb/latest/developerguide/rtrim.md b/documentdb/latest/developerguide/rtrim.md
index 8b1378917..d6dd8f7a6 100644
--- a//documentdb/latest/developerguide/rtrim.md
+++ b//documentdb/latest/developerguide/rtrim.md
@@ -0,0 +1 @@
+[](/pdfs/documentdb/latest/developerguide/developerguide.pdf#rtrim "Open PDF")
@@ -1,0 +3,154 @@
+[Documentation](/index.html)[Amazon DocumentDB](/documentdb/index.html)[Developer Guide](what-is.html)
+
+Example (MongoDB Shell)Code examples
+
+# $rtrim
+
+New from version 4.0.
+
+Not supported by Elastic cluster.
+
+The `$rtrim` operator in Amazon DocumentDB is used to remove trailing characters from a string. By default, it removes trailing whitespace characters, but you can also specify a set of characters to remove by passing the chars argument.
+
+**Parameters**
+
+  * `input`: The input string from which to remove trailing whitespace characters.
+
+  * `chars`: (optional) To remove specific characters.
+
+
+
+
+## Example (MongoDB Shell)
+
+The following example demonstrates how to use the `$rtrim` operator to remove trailing specified characters (" *") from a string.
+
+**Create sample documents**
+    
+    
+    db.collection.insert([
+      { "name": "John Doe*  ", "age": 30 },
+      { "name": "Jane Smith  ", "age": 25 },
+      { "name": "Bob Johnson", "age": 35 }
+    ]);
+
+**Query example**
+    
+    
+    db.collection.aggregate([
+      {
+        $project: {
+          _id: 0,
+          name: { $rtrim: { input: "$name", chars: " *" } }, 
+          age: 1
+        }
+      }
+    ]);
+
+**Output**
+    
+    
+    [
+      { age: 30, name: 'John Doe' },
+      { age: 25, name: 'Jane Smith' },
+      { age: 35, name: 'Bob Johnson' }
+    ]
+
+## Code examples
+
+To view a code example for using the `$rtrim` command, choose the tab for the language that you want to use:
+
+Node.js
+    
+    
+    
+    const { MongoClient, Bson } = require('mongodb');
+    
+    async function example() {
+      const client = await MongoClient.connect('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
+    
+      try {
+    
+        const db = client.db('test');
+        const collection = db.collection('collection');  
+    
+        const pipeline = [
+          {
+            $project: {
+              _id: 0,
+              name: { $rtrim: { input: "$name", chars: " *" } },
+              age: 1
+            }
+          }
+        ];
+    
+        const results = await collection.aggregate(pipeline).toArray();
+        console.dir(results, { depth: null });
+    
+      } catch (err) {
+        console.error('Error occurred:', err);
+      } finally {
+        await client.close();
+      }
+    }
+    
+    example().catch(console.error);
+
+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.collection
+    
+            pipeline = [
+                {
+                    "$project": {
+                        "_id": 0,
+                        "name": { "$rtrim": { "input": "$name", "chars": " *" } },
+                        "age": 1
+                    }
+                }
+            ]
+    
+            results = collection.aggregate(pipeline)
+    
+            for doc in results:
+                print(doc)
+    
+        except Exception as e:
+            print(f"An error occurred: {e}")
+    
+        finally:
+            client.close()
+    
+    example()
+
+![Warning](https://d1ge0kk1l5kms0.cloudfront.net/images/G/01/webservices/console/warning.png) **Javascript is disabled or is unavailable in your browser.**
+
+To use the Amazon Web Services Documentation, Javascript must be enabled. Please refer to your browser's Help pages for instructions.
+
+[Document Conventions](/general/latest/gr/docconventions.html)
+
+$reverseArray
+
+$sample
+
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+
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+
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+
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