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MongoDB Query Language (MQL) features and compatibility

APPLIES TO: MongoDB vCore

Azure Cosmos DB for MongoDB (vCore) combines MongoDB's familiar features with Azure Cosmos DB's enterprise capabilities. This article provides an overview of compatibility and feature support, including the MongoDB wire protocol and query language constructs.

Applications can run without code changes, using the same client drivers, SDKs, and tools. Users benefit from Azure's scalability, security, and integration with other Azure services.

Network Protocol Support

Azure Cosmos DB for MongoDB (vCore) service uses the MongoDB wire protocol, which provides seamless compatibility with existing tools and drivers. Any client driver that supports the MongoDB wire protocol can connect to Azure Cosmos DB for MongoDB (vCore), so applications can run without code changes.

Developers can keep the same client drivers, software development kits (SDKs), and tools. As a user, you also gain Azure's scalability, security, and deep integration with other services within the Azure platform.

Query Language Support

In addition to protocol support, Azure Cosmos DB for MongoDB (vCore) provides comprehensive support for MongoDB query language constructs as well.

Compatibility Philosophy

Overall product compatibility is determined by evaluating the number of MongoDB operators (Aggregation Stages, Aggregation Operators, Query, and Projection Operators and Update Operators) supported by the service. MongoDB commands and admin operations are excluded from this calculation because Azure Cosmos DB for MongoDB (vCore), as a PaaS offering, supports most these commands in-house, eliminating the need for user intervention. These commands aren't exposed to users; however, based on usage patterns and customer feedback, a subset of commonly used commands is available to simplify the user experience.

The overall product compatibility today stands at 99.02%. The compatibility summary table below details support for each operator type:

Total Supported Percentage
Aggregation Stages 60 58 96.67%
Aggregation Operators 181 181 100%
Query and Projection Operators 45 44 97.78%
Update Operators 22 22 100%

The following section presents a comprehensive breakdown of supported database operators, commands, and more features, offering a clear view of the product’s compatibility and functionality across various scenarios.

Operators

The table here lists the operators that are currently supported in Azure Cosmos DB for MongoDB (vCore):

Category Operator Supported (v5.0) Supported (v6.0) Supported (v7.0) Supported (v8.0)
Comparison Query Operators $eq ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $gt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $gte ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $in ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $lt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $lte ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $ne ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Query Operators $nin ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Logical Query Operators $and ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Logical Query Operators $not ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Logical Query Operators $nor ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Logical Query Operators $or ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Element Query Operators $exists ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Element Query Operators $type ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Evaluation Query Operators $expr ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Evaluation Query Operators $jsonSchema* ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Evaluation Query Operators $mod ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Evaluation Query Operators $regex ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Evaluation Query Operators $text ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Evaluation Query Operators $where Deprecated in Mongo version 8.0
Geospatial Operators $geoIntersects ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $geoWithin ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $box ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $center ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $centerSphere ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $geometry ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $maxDistance ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $minDistance ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $polygon ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $near ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Operators $nearSphere ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Query Operators $all ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Query Operators $elemMatch ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Query Operators $size ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Query Operators $bitsAllClear ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Query Operators $bitsAllSet ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Query Operators $bitsAnyClear ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Query Operators $bitsAnySet ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Projection Operators $ ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Projection Operators $elemMatch ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Projection Operators $meta ❌ No ❌ No ❌ No ❌ No
Projection Operators $slice ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Miscellaneous Query Operators $comment ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Miscellaneous Query Operators $rand ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Miscellaneous Query Operators $natural ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $currentDate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $inc ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $min ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $max ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $mul ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $rename ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $set ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $setOnInsert ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Field Update Operators $unset ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $ ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $[] ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $[identifier] ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $addToSet ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $pop ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $pull ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $push ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $pullAll ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $each ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $position ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $slice ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Update Operators $sort ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Update Operators $bit ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $abs ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $add ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $ceil ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $divide ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $exp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $floor ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $ln ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $log ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $log10 ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $mod ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $multiply ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $pow ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $round ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $sqrt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $subtract ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Arithmetic Expression Operators $trunc ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $arrayElemAt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $arrayToObject ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $concatArrays ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $filter ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $firstN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $in ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $indexOfArray ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $isArray ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $lastN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $map ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $maxN ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $minN ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $objectToArray ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $range ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $reduce ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $reverseArray ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $size ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $slice ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $sortArray ✅ Yes ✅ Yes ✅ Yes
Array Expression Operators $zip ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Operators $bitAnd ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Operators $bitNot ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Operators $bitOr ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Bitwise Operators $bitXor ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Boolean Expression Operators $and ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Boolean Expression Operators $not ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Boolean Expression Operators $or ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $cmp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $eq ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $gt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $gte ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $lt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $lte ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Comparison Expression Operators $ne ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Custom Aggregation Expression Operators $accumulator Deprecated in Mongo version 8.0
Custom Aggregation Expression Operators $function Deprecated in Mongo version 8.0
Data Size Operators $bsonSize ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Data Size Operators $binarySize ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateAdd ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateDiff ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateFromParts ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateFromString ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateSubtract ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateToParts ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateToString ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dateTrunc ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dayOfMonth ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dayOfWeek ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $dayOfYear ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $hour ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $isoDayOfWeek ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $isoWeek ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $isoWeekYear ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $millisecond ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $minute ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $month ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $second ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $toDate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $week ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Date Expression Operators $year ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Literal Expression Operator $literal ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Miscellaneous Operators $getField ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Miscellaneous Operators $rand ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Miscellaneous Operators $sampleRate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Object Expression Operators $mergeObjects ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Object Expression Operators $objectToArray ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Object Expression Operators $setField ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $allElementsTrue ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $anyElementTrue ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $setDifference ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $setEquals ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $setIntersection ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $setIsSubset ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Set Expression Operators $setUnion ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $concat ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $dateFromString ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $dateToString ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $indexOfBytes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $indexOfCP ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $ltrim ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $regexFind ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $regexFindAll ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $regexMatch ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $replaceOne ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $replaceAll ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $rtrim ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $split ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $strLenBytes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $strLenCP ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $strcasecmp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $substr ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $substrBytes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $substrCP ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $toLower ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $toString ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $trim ✅ Yes ✅ Yes ✅ Yes ✅ Yes
String Expression Operators $toUpper ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Text Expression Operator $meta ❌ No ❌ No ❌ No ❌ No
Timestamp Expression Operators $tsIncrement ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Timestamp Expression Operators $tsSecond ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $sin ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $cos ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $tan ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $asin ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $acos ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $atan ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $atan2 ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $asinh ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $acosh ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $atanh ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $sinh ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $cosh ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $tanh ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $degreesToRadians ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Trigonometry Expression Operators $radiansToDegrees ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $convert ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $isNumber ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toBool ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toDate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toDecimal ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toDouble ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toInt ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toLong ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toObjectId ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $toString ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Type Expression Operators $type ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $accumulator Deprecated in Mongo version 8.0
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $addToSet ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $avg ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $bottom ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $bottomN ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $count ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $first ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $firstN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $last ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $lastN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $max ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $maxN ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $median ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $mergeObjects ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $min ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $percentile ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $push ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $stdDevPop ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $stdDevSamp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $sum ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $top ✅ Yes ✅ Yes ✅ Yes
Accumulators ($group, $bucket, $bucketAuto, $setWindowFields) $topN ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $avg ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $first ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $last ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $max ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $median ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $min ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $percentile ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $stdDevPop ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $stdDevSamp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Accumulators (in Other Stages) $sum ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variable Expression Operators $let ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $sum ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $push ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $addToSet ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $count ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $max ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $min ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $avg ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $stdDevPop ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $bottom ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $bottomN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $covariancePop ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $covarianceSamp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $denseRank ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $derivative ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $documentNumber ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $expMovingAvg ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $first ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $integral ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $last ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $linearFill ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $locf ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $minN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $rank ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $shift ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $stdDevSamp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $top ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Window Operators $topN ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Conditional Expression Operators $cond ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Conditional Expression Operators $ifNull ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Conditional Expression Operators $switch ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $addFields ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $bucket ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $bucketAuto ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $changeStream ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $changeStreamSplitLargeEvent ❌ No ❌ No ❌ No ❌ No
Aggregation Pipeline Stages $collStats ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $count ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $densify ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $documents ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $facet ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $fill ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $geoNear ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $graphLookup ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $group ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $indexStats ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $limit ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $listSampledQueries ❌ No ❌ No ❌ No ❌ No
Aggregation Pipeline Stages $listSearchIndexes ❌ No ❌ No ❌ No ❌ No
Aggregation Pipeline Stages $listSessions ❌ No ❌ No ❌ No ❌ No
Aggregation Pipeline Stages $lookup ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $match ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $merge ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $out ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $planCacheStats ❌ No ❌ No ❌ No ❌ No
Aggregation Pipeline Stages $project ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $redact ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $replaceRoot ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $replaceWith ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $sample ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $search ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $searchMeta ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $set ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $setWindowFields ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $skip ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $sort ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $sortByCount ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $unionWith ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $unset ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $unwind ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $shardedDataDistribution ❌ No ❌ No ❌ No ❌ No
Aggregation Pipeline Stages $currentOp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Pipeline Stages $listLocalSessions ❌ No ❌ No ❌ No ❌ No
Variables in Aggregation Expressions NOW ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions ROOT ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions REMOVE ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions CURRENT ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions CLUSTER_TIME ❌ No ❌ No ❌ No ❌ No
Variables in Aggregation Expressions DESCEND ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions PRUNE ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions KEEP ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Variables in Aggregation Expressions SEARCH_META ❌ No ❌ No ❌ No ❌ No
Variables in Aggregation Expressions USER_ROLES ❌ No ❌ No ❌ No ❌ No

Note

AvgObjsize and size in collStats & dbStats only works with documents that are sized less than 2 kilobytes.

Schema validation supports: insert, update, findAndModify, and the $merge / $out stages in aggregation. Use bypassDocumentValidation to skip validation if needed.

This article lists only the supported server-side commands and doesn't include client-side wrapper functions. Client-side wrapper functions, such as deleteMany() and updateMany(), internally invoke the corresponding server commands (delete() and update()). Any function that relies on supported server commands is compatible with Azure Cosmos DB for MongoDB (vCore).

Database commands

Azure Cosmos DB for MongoDB (vCore) supports the following database commands:

Category Command Feature (v5.0) Feature (v6.0) Feature (v7.0) Feature (v8.0)
Administrative Commands cloneCollectionAsCapped ❌ No ❌ No ❌ No ❌ No
Administrative Commands collMod ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands compact ❌ No ❌ No ❌ No ❌ No
Administrative Commands convertToCapped ❌ No ❌ No ❌ No ❌ No
Administrative Commands create ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands createIndexes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands currentOp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands drop ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands dropDatabase ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands dropIndexes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands filemd5 ❌ No ❌ No ❌ No ❌ No
Administrative Commands getDefaultRWConcern ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands getClusterParameter N/A¹ ❌ No ❌ No ❌ No
Administrative Commands getParameter ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands killCursors ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands killOp ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands listCollections ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands listDatabases ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands listIndexes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands reIndex ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands renameCollection ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands setIndexCommitQuorum ❌ No ❌ No ❌ No ❌ No
Administrative Commands setParameter ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Administrative Commands setDefaultRWConcern ❌ No ❌ No ❌ No ❌ No
Administrative Commands validateDBMetadata ❌ No ❌ No ❌ No ❌ No
Administrative Commands dropConnections N/A² N/A² N/A² N/A²
Administrative Commands fsync N/A² N/A² N/A² N/A²
Administrative Commands fsyncUnlock N/A² N/A² N/A² N/A²
Administrative Commands logRotate N/A² N/A² N/A² N/A²
Administrative Commands rotateCertificates N/A² N/A² N/A² N/A²
Administrative Commands setFeatureCompatibilityVersion N/A² N/A² N/A² N/A²
Administrative Commands shutdown N/A² N/A² N/A² N/A²
Administrative Commands compactStructuredEncryptionData N/A² N/A² N/A² N/A²
Administrative Commands setUserWriteBlockMode N/A² N/A² N/A² N/A²
Aggregation Commands aggregate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Commands count ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Commands distinct ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Aggregation Commands mapReduce N/A³ N/A³ N/A³ N/A³
Authentication Commands authenticate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Authentication Commands logout N/A³ N/A³ N/A³ N/A³
Diagnostic Commands buildInfo ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands collStats ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands connPoolStats ❌ No ❌ No ❌ No ❌ No
Diagnostic Commands connectionStatus ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands dataSize ❌ No ❌ No ❌ No ❌ No
Diagnostic Commands dbHash ❌ No ❌ No ❌ No ❌ No
Diagnostic Commands dbStats ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands explain ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands getCmdLineOpts ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands getLog ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands hello ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands hostInfo ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands listCommands ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands lockInfo ❌ No ❌ No ❌ No ❌ No
Diagnostic Commands ping ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands profile N/A² N/A² N/A² N/A²
Diagnostic Commands serverStatus ❌ No ❌ No ❌ No ❌ No
Diagnostic Commands shardConnPoolStats N/A³ N/A³ N/A³ N/A³
Diagnostic Commands top ❌ No ❌ No ❌ No ❌ No
Diagnostic Commands validate ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Diagnostic Commands whatsmyuri ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Geospatial Commands geoSearch N/A³ N/A³ N/A³ N/A³
Query and Write Operation Commands bulkWrite ❌ No ❌ No ❌ No ❌ No
Query and Write Operation Commands delete ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Query and Write Operation Commands find ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Query and Write Operation Commands findAndModify ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Query and Write Operation Commands getLastError N/A⁴ N/A⁴ N/A⁴ N/A⁴
Query and Write Operation Commands getMore ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Query and Write Operation Commands insert ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Query and Write Operation Commands resetError N/A³ N/A³ N/A³ N/A³
Query and Write Operation Commands update ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Query Plan Cache Commands N/A⁵
Replication Commands N/A⁶
Role Management Commands N/A⁷
Session Commands abortTransaction ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Session Commands commitTransaction ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Session Commands endSessions ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Session Commands killAllSessions ❌ No ❌ No ❌ No ❌ No
Session Commands killAllSessionsByPattern ❌ No ❌ No ❌ No ❌ No
Session Commands killSessions ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Session Commands refreshSessions ❌ No ❌ No ❌ No ❌ No
Session Commands startSession ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Sharding Commands enableSharding ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Sharding Commands isdbgrid ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Sharding Commands reshardCollection ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Sharding Commands shardCollection ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Sharding Commands unsetSharding N/A³ N/A³ N/A³ N/A³
Sharding Commands addShardToZone N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands clearJumboFlag N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands abortUnshardCollection N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands removeShard N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands removeShardFromZone N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands setShardVersion N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands mergeChunks N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands abortMoveCollection N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands getShardMap N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands analyzeShardKey N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands medianKey N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands checkMetadataConsistency N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands shardingState N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands cleanupReshardCollection N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands flushRouterConfig N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands balancerCollectionStatus N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands balancerStart N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands balancerStatus N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands balancerStop N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands configureCollectionBalancing N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands listShards N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands split N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands moveChunk N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands updateZoneKeyRange N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands movePrimary N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands moveRange N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands abortReshardCollection N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands commitReshardCollection N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands refineCollectionShardKey N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands configureQueryAnalyzer N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands transitionFromDedicatedConfigServer N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands transitionToDedicatedConfigServer N/A⁸ N/A⁸ N/A⁸ N/A⁸
Sharding Commands unshardCollection N/A⁸ N/A⁸ N/A⁸ N/A⁸
System Events Auditing Commands logApplicationMessage ❌ No ❌ No ❌ No ❌ No
User Management Commands createUser ✅ Yes ✅ Yes ✅ Yes ✅ Yes
User Management Commands dropUser ✅ Yes ✅ Yes ✅ Yes ✅ Yes
User Management Commands usersInfo ✅ Yes ✅ Yes ✅ Yes ✅ Yes
User Management Commands dropAllUsersFromDatabase N/A⁷ N/A⁷ N/A⁷ N/A⁷
User Management Commands grantRolesToUser N/A⁷ N/A⁷ N/A⁷ N/A⁷
User Management Commands revokeRolesFromUser N/A⁷ N/A⁷ N/A⁷ N/A⁷
User Management Commands updateUser N/A⁷ N/A⁷ N/A⁷ N/A⁷

Note

  1. getClusterParameter isn't supported in v5.0.
  2. Azure fully manages Azure Cosmos DB for MongoDB (vCore), a PaaS service, for commands like dropConnections, fsync, logRotate, etc.
  3. Deprecated in MongoDB version 5.0.
  4. Deprecated in MongoDB version 5.1.
  5. Being a PaaS service, the database engine manages query plan caching for you.
  6. Azure manages replication, removing the necessity to replicate manually.
  7. As a fully managed service, this capability is provided through Microsoft Entra ID.
  8. As a PaaS offering, Azure handles shard management and rebalancing. You only need to shard your collections. Azure takes care of the rest.

Index Types and their Properties

Azure Cosmos DB for MongoDB (vCore) supports various index types and properties to optimize query performance and enhance data management flexibility.

Indexes

Azure Cosmos DB for MongoDB (vCore) supports the following index types:

Index Description Supported
Single Field Index Indexes a single field for faster lookups. ✅ Yes
Compound Index Indexes multiple fields in one index. ✅ Yes
Multikey Index Indexes array fields by indexing each element. ✅ Yes
Text Index Supports text search on string fields. ✅ Yes
Wildcard Index Dynamically indexes all or selected fields. ✅ Yes
Geospatial Index Supports spatial queries on GeoJSON data. ✅ Yes
Hashed Index Indexes hashed field values, often for sharding. ✅ Yes
Vector Index (only in Cosmos DB) Enables similarity search on vector data. ✅ Yes, with vector search

Note

Creating a unique index obtains an exclusive lock on the collection for the entire duration of the build process. These indexes block read and write operations on the collection until the operation is completed.

Index properties

Azure Cosmos DB for MongoDB (vCore) supports the following index properties:

Index Property Description Supported
time-to-live (TTL) Automatically deletes documents after a specified time-to-live period. ✅ Yes
Unique Ensures that all values in the indexed field are unique. ✅ Yes
Partial Indexes only documents that match a specified filter condition. ✅ Yes
Case Insensitive Supports case-insensitive indexing for string fields. ✅ Yes
Sparse Indexes only documents that contain the indexed field. ✅ Yes
Background Allows the index to be created in the background without blocking operations. ✅ Yes