AWS documentdb documentation change

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

File: documentdb/latest/developerguide/trim.md

Summary

Added new documentation page for the $trim aggregation 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 standard database operator ($trim) used for string manipulation. There is no evidence of security vulnerability fixes, security patches, or security incident remediation. The code examples show standard TLS connection parameters which are normal security practices for database connections, but this is not new security documentation.

Diff

diff --git a/documentdb/latest/developerguide/trim.md b/documentdb/latest/developerguide/trim.md
index 8b1378917..ad22bee50 100644
--- a//documentdb/latest/developerguide/trim.md
+++ b//documentdb/latest/developerguide/trim.md
@@ -0,0 +1 @@
+[](/pdfs/documentdb/latest/developerguide/developerguide.pdf#trim "Open PDF")
@@ -1,0 +3,118 @@
+[Documentation](/index.html)[Amazon DocumentDB](/documentdb/index.html)[Developer Guide](what-is.html)
+
+Example (MongoDB Shell)Code examples
+
+# $trim
+
+New from version 4.0
+
+The `$trim` operator in Amazon DocumentDB is used to remove leading and/or trailing whitespace characters from a string.
+
+**Parameters**
+
+  * `input`: The string expression to trim.
+
+  * `chars`: (optional) Specifies the characters to trim from the beginning and end of the input, the default is whitespace.
+
+
+
+
+## Example (MongoDB Shell)
+
+The following example demonstrates how to use the `$trim` operator to remove leading and trailing whitespace from a string.
+
+**Create sample documents**
+    
+    
+    db.people.insertMany([
+      { "name": "   John Doe   " },
+      { "name": "   Bob Johnson   " }
+    ])
+
+**Query example**
+    
+    
+    db.people.aggregate([
+      { $project: {
+        "name": { $trim: {input: "$name"}}
+      }}
+    ])
+
+**Output**
+    
+    
+    [
+      { "name": "John Doe" },
+      { "name": "Bob Johnson" }
+    ]
+
+## Code examples
+
+To view a code example for using the `$trim` command, choose the tab for the language that you want to use:
+
+Node.js
+    
+    
+    
+    const { MongoClient } = 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');
+      const db = client.db('test');
+      const collection = db.collection('people');
+    
+      const result = await collection.aggregate([
+        { $project: {
+          "name": { $trim: {input: "$name" }}
+        }}
+      ]).toArray();
+    
+      console.log(result);
+      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')
+        db = client['test']
+        collection = db['people']
+    
+        result = list(collection.aggregate([
+            {"$project": {
+                "name": {"$trim": {"input": "$name"}}
+            }}
+        ]))
+    
+        print(result)
+        client.close()
+    
+    example()
+
+![Warning](https://d1ge0kk1l5kms0.cloudfront.net/images/G/01/webservices/console/warning.png) **Javascript is disabled or is unavailable in your browser.**
+
+To use the Amazon Web Services Documentation, Javascript must be enabled. Please refer to your browser's Help pages for instructions.
+
+[Document Conventions](/general/latest/gr/docconventions.html)
+
+$toUpper
+
+$type
+
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+
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+
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