Supported features: 3.6

The following tables include a breakdown of MongoDB 3.6 features supported by Firestore with MongoDB compatibility. For differences in behavior, see Behavior differences.

Query and projection operators

Firestore with MongoDB compatibility supports the following query and projection operators:

Array operators

Operator	Supported
`$all`	Yes
`$elemMatch`	Yes
`$size`	Yes

Bitwise operators

Operator	Supported
`$bitsAllClear`	No
`$bitsAllSet`	No
`$bitsAnyClear`	No
`$bitsAnySet`	No

Comment operator

Operator	Supported
`$comment`	No

Comparison operators

Operator	Supported
`$eq`	Yes
`$gt`	Yes
`$gte`	Yes
`$in`	Yes
`$lt`	Yes
`$lte`	Yes
`$ne`	Yes
`$nin`	Yes

Element operators

Operator	Supported
`$exists`	Yes
`$type`	Yes

Evaluation query operators

Operator	Supported
`$expr`	Yes
`$jsonSchema`	No
`$mod`	Yes
`$regex`	Yes
`$text`	No
`$where`	No

Logical operators

Operator	Supported
`$and`	Yes
`$nor`	Yes
`$not`	Yes
`$or`	Yes

Projection operators

Operator	Supported
`$`	No
`$elemMatch`	Yes
`$meta`	No
`$slice`	Yes

Update operators

Firestore with MongoDB compatibility supports the following update operators.

Array operators

Operator	Supported
`$`	No
`$[]`	No
`$[<identifier>]`	No
`$addToSet`	No
`$pop`	No
`$pull`	No
`$pullAll`	No
`$push`	No

Bitwise operators

Operator	Supported
`$bit`	Yes

Field operators

Operator	Supported
`$currentDate`	Yes
`$inc`	Yes
`$max`	Yes
`$min`	Yes
`$mul`	Yes
`$rename`	Yes
`$setOnInsert`	Yes

Update modifiers

Modifier	Supported
`$each`	No
`$position`	No
`$slice`	No
`$sort`	No

Aggregation pipeline operators

Firestore with MongoDB compatibility supports the following aggregation pipeline operators.

Accumulator expressions

Expression	Supported
`$addToSet`	No
`$avg`	Yes
`$count`	Yes
`$first`	Yes
`$last`	Yes
`$max`	Yes
`$min`	Yes
`$push`	Yes
`$stdDevPop`	No
`$stdDevSamp`	No
`$sum`	Yes

Arithmetic operators

Operator	Supported
`$abs`	Yes
`$add`	Yes
`$ceil`	Yes
`$divide`	Yes
`$exp`	No
`$floor`	Yes
`$ln`	No
`$log`	No
`$log10`	No
`$mod`	Yes
`$multiply`	Yes
`$pow`	No
`$sqrt`	No
`$subtract`	Yes
`$trunc`	No

Array operators

Operator	Supported
`$arrayElemAt`	Yes
`$arrayToObject`	Yes
`$concatArrays`	Yes
`$filter`	No
`$firstN`	No
`$in`	Yes
`$indexOfArray`	No
`$isArray`	Yes
`$objectToArray`	No
`$range`	No
`$reduce`	No
`$reverseArray`	Yes
`$size`	Yes
`$slice`	Yes
`$zip`	No

Boolean operators

Operator	Supported
`$and`	Yes
`$not`	Yes
`$or`	Yes

Comparison operators

Operator	Supported
`$cmp`	Yes
`$eq`	Yes
`$gt`	Yes
`$gte`	Yes
`$lt`	Yes
`$lte`	Yes
`$ne`	Yes

Conditional expression operators

Operator	Supported
`$cond`	Yes
`$ifNull`	Yes
`$switch`	Yes

Date operators

Operator	Supported
`$dateFromParts`	No
`$dateFromString`	Yes
`$dateToParts`	Yes
`$dateToString`	Yes
`$dayOfMonth`	Yes
`$dayOfWeek`	Yes
`$dayOfYear`	Yes
`$hour`	Yes
`$isoDayOfWeek`	Yes
`$isoWeek`	Yes
`$isoWeekYear`	Yes
`$millisecond`	Yes
`$minute`	Yes
`$month`	Yes
`$second`	Yes
`$week`	Yes
`$year`	Yes

Miscellaneous operators

Operator	Supported
`$literal`	Yes
`$mergeObjects`	No
`$natural`	No

Set operators

Operator	Supported
`$allElementsTrue`	No
`$anyElementTrue`	No
`$setDifference`	No
`$setEquals`	No
`$setIntersection`	No
`$setIsSubset`	No
`$setUnion`	No

Stage operators

Operator	Supported
`$addFields`	Yes
`$bucket`	No
`$bucketAuto`	No
`$collStats`	No
`$count`	Yes
`$currentOp`	No
`$facet`	No
`$geoNear`	No
`$graphLookup`	No
`$group`	Yes
`$indexStats`	No
`$limit`	Yes
`$listLocalSessions`	No
`$listSessions`	No
`$lookup`	No
`$match`	Yes
`$out`	No
`$project`	Yes
`$redact`	No
`$replaceRoot`	Yes
`$sample`	No
`$set`	Yes
`$skip`	Yes
`$sort`	Yes
`$sortByCount`	Yes
`$unset`	Yes
`$unwind`	Yes

String operators

Operator	Supported
`$concat`	Yes
`$indexOfBytes`	Yes
`$indexOfCP`	Yes
`$split`	Yes
`$strcasecmp`	Yes
`$strLenBytes`	Yes
`$strLenCP`	Yes
`$substr`	Yes
`$substrBytes`	Yes
`$substrCP`	Yes
`$toLower`	Yes
`$toUpper`	Yes

System variables

Variable	Supported
`$$CURRENT`	No
`$$DESCEND`	No
`$$KEEP`	No
`$$PRUNE`	No
`$$REMOVE`	Yes
`$$ROOT`	Yes

Text search operators

Operator	Supported
`$meta`	No

Type conversion operators

Operator	Supported
`$type`	No

Variable operators

Operator	Supported
`$let`	No
`$map`	No

Geospatial

Firestore with MongoDB compatibility supports the following Geospatial operators.

Geometry specifiers

Specifier	Supported
`$box`	No
`$center`	No
`$centerSphere`	No
`$geometry`	No
`$maxDistance`	No
`$minDistance`	No
`$polygon`	No
`$uniqueDocs`	No

Query selectors

Selector	Supported
`$geoIntersects`	No
`$geoWithin`	No
`$near`	No
`$nearSphere`	No
`$nearSphere`	No
`$uniqueDocs`	No

Indexes and index properties

Firestore with MongoDB compatibility supports the following indexes and index operators.

Indexes

Index type	Supported
2d	No
2dsphere	No
Compound	Yes
Hashed	No
Multikey	Yes
Single Field	Yes
Text	No

Index properties

Property	Supported
Background	Yes
Case Insensitive	No
Partial	No
Non-Sparse	Yes
Sparse	Yes
Text	No
TTL	No
Unique	No

Database commands

Firestore with MongoDB compatibility supports the following database commands.

Aggregation

Command	Supported
`aggregate`	Yes
`count`	Yes
`distinct`	Yes
`group`	No The `$group` stage in aggregations is supported whereas the group command isn't.
`mapReduce`	No

Authentication

Command	Supported
`authenticate`	No
`getnonce`	No
`logout`	No

Query and write operations

Command	Supported
`delete`	Yes
`eval`	No
`find`	Yes
`findAndModify`	Yes
`getLastError`	Yes
`getMore`	Yes
`getPrevError`	No
`GridFS`	No
`insert`	Yes
`parallelCollectionScan`	No
`replaceOne`	No The `replaceOne` driver method is supported with the `update` command.
`resetError`	No
`update`	Yes

Session commands

Command	Supported
`endSessions`	Yes
`killAllSessions`	No
`killAllSessionsByPattern`	No
`killSessions`	No
`refreshSessions`	No
`startSession`	Sessions can be started using the `startSession` driver method.

Administrative commands

Firestore with MongoDB compatibility supports the following administrative commands.

Command	Supported
`cloneCollectionAsCapped`	No
`collMod`	No
`collMod: expireAfterSeconds`	No
`convertToCapped`	No
`copydb`	No
`create`	Yes
`createIndexes`	No To create indexes, see Manage indexes.
`createView`	No
`currentOp`	No
`drop`	No
`dropDatabase`	No To delete a database, see Delete a database.
`dropIndexes`	No To delete indexes, see Manage indexes.
`filemd5`	No
`killCursors`	Yes
`killOp`	No
`listCollections`	Yes
`listDatabases`	Yes
`listIndexes`	Yes
`reIndex`	No
`renameCollection`	No
`setAuditConfig`	No

Diagnostic commands

Command	Supported
`buildInfo`	Yes
`collStats`	No
`connectionStatus`	Yes
`connPoolStats`	No
`dataSize`	No
`dbHash`	No
`dbStats`	No
`explain`	No
`explain: executionStats`	No
`features`	No
`hostInfo`	Yes
`listCommands`	No
`profiler`	No
`serverStatus`	No
`top`	No
`whatsmyuri`	No

Role management commands

To manage database access, Firestore with MongoDB compatibility supports Identity and Access Management roles and permissions.

Command	Supported
`createRole`	No
`dropAllRolesFromDatabase`	No
`dropRole`	No
`grantRolesToRole`	No
`revokePrivilegesFromRole`	No
`revokeRolesFromRole`	No
`rolesInfo`	No
`updateRole`	No

What's next

Run the Quickstart: Create a database and connect to it.
Learn about Behavior differences.