AWS documentdb documentation change

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

File: documentdb/latest/developerguide/size-query.md

Summary

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

Security assessment

This change adds routine documentation for a query operator ($size) with standard usage examples. The code examples include TLS connection parameters (tls=true, tlsCAFile) which are standard security practices for DocumentDB connections, but this is not new security documentation - it's standard connection string formatting. No evidence of addressing a specific security vulnerability or incident.

Diff

diff --git a/documentdb/latest/developerguide/size-query.md b/documentdb/latest/developerguide/size-query.md
index 8b1378917..83794baa5 100644
--- a//documentdb/latest/developerguide/size-query.md
+++ b//documentdb/latest/developerguide/size-query.md
@@ -0,0 +1 @@
+[](/pdfs/documentdb/latest/developerguide/developerguide.pdf#size-query "Open PDF")
@@ -1,0 +3,104 @@
+[Documentation](/index.html)[Amazon DocumentDB](/documentdb/index.html)[Developer Guide](what-is.html)
+
+Example (MongoDB Shell)Code examples
+
+# $size
+
+The `$size` query operator matches documents where an array field has exactly the specified number of elements. This is useful for filtering documents based on array length.
+
+**Parameters**
+
+  * `field`: The array field to check.
+
+  * `count`: The exact number of elements the array must contain.
+
+
+
+
+## Example (MongoDB Shell)
+
+The following example demonstrates using the `$size` operator to find all products that have exactly three tags.
+
+**Create sample documents**
+    
+    
+    db.products.insertMany([
+      { _id: 1, name: "Laptop", tags: ["electronics", "computers", "portable"] },
+      { _id: 2, name: "Mouse", tags: ["electronics", "accessories"] },
+      { _id: 3, name: "Desk", tags: ["furniture", "office", "workspace"] },
+      { _id: 4, name: "Monitor", tags: ["electronics"] }
+    ]);
+
+**Query example**
+    
+    
+    db.products.find({ tags: { $size: 3 } });
+
+**Output**
+    
+    
+    { "_id" : 1, "name" : "Laptop", "tags" : [ "electronics", "computers", "portable" ] }
+    { "_id" : 3, "name" : "Desk", "tags" : [ "furniture", "office", "workspace" ] }
+
+## Code examples
+
+To view a code example for using the `$size` query operator, 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('products');
+    
+      const result = await collection.find({ tags: { $size: 3 } }).toArray();
+    
+      console.log(JSON.stringify(result, null, 2));
+      await client.close();
+    }
+    
+    example();
+
+Python
+    
+    
+    
+    from pymongo import MongoClient
+    
+    def example():
+        client = MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false')
+        db = client['test']
+        collection = db['products']
+    
+        result = list(collection.find({'tags': {'$size': 3}}))
+    
+        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)
+
+$slice
+
+$text
+
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+
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+
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+
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