AWS documentdb documentation change

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

File: documentdb/latest/developerguide/log10.md

Summary

Added new documentation page for the $log10 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 mathematical operator ($log10) in Amazon DocumentDB. The content focuses on functionality and usage examples, with no mention of security vulnerabilities, patches, or security features. The code examples include standard TLS connection parameters (tls=true, tlsCAFile) which are routine security best practices for database connections, but these are not new security features being documented.

Diff

diff --git a/documentdb/latest/developerguide/log10.md b/documentdb/latest/developerguide/log10.md
index 8b1378917..59790d338 100644
--- a//documentdb/latest/developerguide/log10.md
+++ b//documentdb/latest/developerguide/log10.md
@@ -0,0 +1 @@
+[](/pdfs/documentdb/latest/developerguide/developerguide.pdf#log10 "Open PDF")
@@ -1,0 +3,148 @@
+[Documentation](/index.html)[Amazon DocumentDB](/documentdb/index.html)[Developer Guide](what-is.html)
+
+Example (MongoDB Shell)Code examples
+
+# $log10
+
+New from version 4.0.
+
+The `$log10` operator in Amazon DocumentDB is used to calculate the base-10 logarithm of a number. It is useful for performing logarithmic calculations on numeric fields within the aggregation pipeline.
+
+**Parameters**
+
+  * `expression`: The numeric expression for which the base-10 logarithm is to be calculated.
+
+
+
+
+## Example (MongoDB Shell)
+
+The following example demonstrates how to use the `$log10` operator to calculate the base-10 logarithm of a numeric field.
+
+**Create sample documents**
+    
+    
+    db.numbers.insertMany([
+      { _id: 1, value: 1 },
+      { _id: 2, value: 10 },
+      { _id: 3, value: 100 },
+      { _id: 4, value: 1000 }
+    ]);
+
+**Query example**
+    
+    
+    db.numbers.aggregate([
+      {
+        $project: {
+          _id: 1,
+          log10Value: { $log10: "$value" }
+        }
+      }
+    ]);
+
+**Output**
+    
+    
+    [
+      { "_id": 1, "log10Value": 0 },
+      { "_id": 2, "log10Value": 1 },
+      { "_id": 3, "log10Value": 2 },
+      { "_id": 4, "log10Value": 3 }
+    ]
+
+## Code examples
+
+To view a code example for using the `$log10` command, choose the tab for the language that you want to use:
+
+Node.js
+    
+    
+    
+    const { MongoClient } = require('mongodb');
+    
+    async function example() {
+      let client;
+    
+      try {
+        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('numbers');
+    
+        const result = await collection.aggregate([
+          {
+            $project: {
+              _id: 1,
+              log10Value: { $log10: "$value" }
+            }
+          }
+        ]).toArray();
+    
+        console.log(result);
+      } catch (error) {
+        console.error("An error occurred:", error);
+      } finally {
+        if (client) {
+          await client.close();
+        }
+      }
+    }
+    
+    example();
+
+Python
+    
+    
+    
+    from pymongo import MongoClient
+    
+    def example():
+        client = None
+        try:
+            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.numbers
+    
+            result = list(collection.aggregate([
+                {
+                    '$project': {
+                        '_id': 1,
+                        'log10Value': { '$log10': '$value' }
+                    }
+                }
+            ]))
+    
+            print(result)
+        
+        except Exception as e:
+            print(f"An error occurred: {e}")
+        
+        finally:
+            if client:
+                client.close()
+    
+    example()
+
+![Warning](https://d1ge0kk1l5kms0.cloudfront.net/images/G/01/webservices/console/warning.png) **Javascript is disabled or is unavailable in your browser.**
+
+To use the Amazon Web Services Documentation, Javascript must be enabled. Please refer to your browser's Help pages for instructions.
+
+[Document Conventions](/general/latest/gr/docconventions.html)
+
+$log
+
+$lt
+
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+
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+
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+
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+
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+
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