Stable API Changelog

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Database Commands

Aggregation
Unsupported Aggregation Stages
Supported Aggregation Operators

This page contains a changelog of the Stable API. The Stable API is actively being expanded to include new database commands and functionality.

The commands and operators included in the Stable API depend on the MongoDB version you are using. This page describes the MongoDB and Stable API versions when a database command or specific sub-features of a command are available.

Database Commands

The following table describes:

The commands included in each version of the Stable API.
The MongoDB version in which the command was added to the Stable API.

Command	Stable API Version	Added to Stable API in Version
`count`	V1	MongoDB 6.0, 5.0.9
`abortTransaction`	V1	MongoDB 5.0
`aggregate` (with limitations)	V1	MongoDB 5.0
`authenticate`	V1	MongoDB 5.0
`collMod`	V1	MongoDB 5.0
`commitTransaction`	V1	MongoDB 5.0
`create` (with limitations) [1]	V1	MongoDB 5.0
`createIndexes` (with limitations) [1]	V1	MongoDB 5.0
`delete`	V1	MongoDB 5.0
`drop`	V1	MongoDB 5.0
`dropDatabase`	V1	MongoDB 5.0
`dropIndexes`	V1	MongoDB 5.0
`endSessions`	V1	MongoDB 5.0
`explain` [2]	V1	MongoDB 5.0
`find` (with limitations) [1]	V1	MongoDB 5.0
`findAndModify`	V1	MongoDB 5.0
`getMore`	V1	MongoDB 5.0
`insert`	V1	MongoDB 5.0
`hello`	V1	MongoDB 5.0
`killCursors`	V1	MongoDB 5.0
`listCollections`	V1	MongoDB 5.0
`listDatabases`	V1	MongoDB 5.0
`listIndexes`	V1	MongoDB 5.0
`ping`	V1	MongoDB 5.0
`refreshSessions`	V1	MongoDB 5.0
`update`	V1	MongoDB 5.0

[1]	(1, 2, 3) API V1 may not support all available options for these commands. Refer to the specific command documentation for limitations specific to API V1.

[2]	MongoDB does not guarantee any specific output format from the `explain` command, even when using the Stable API.

Aggregation

This section describes the aggregation stages and operators included in the Stable API.

Unsupported Aggregation Stages

The following aggregation stages are not included in the Stable API:

For more information on aggregation in the Stable API, see the Stable API section of the aggregate command page.

Supported Aggregation Operators

The following aggregation operators are included in the Stable API:

Operator	Stable API Version	Added to Stable API in Version
`$abs`	V1	MongoDB 5.0
`$add`	V1	MongoDB 5.0
`$addToSet`	V1	MongoDB 6.0
`$and` (aggregation)	V1	MongoDB 5.0
`$anyElementTrue`	V1	MongoDB 5.0
`$arrayElemAt`	V1	MongoDB 5.0
`$arrayToObject`	V1	MongoDB 5.0
`$avg`	V1	MongoDB 6.0
`$binarySize`	V1	MongoDB 5.0
`$bsonSize`	V1	MongoDB 5.0
`$bottom`	V1	MongoDB 6.0
`$bottomN`	V1	MongoDB 6.0
`$ceil`	V1	MongoDB 5.0
`$cmp`	V1	MongoDB 5.0
`$concat`	V1	MongoDB 5.0
`$concatArrays`	V1	MongoDB 5.0
`$cond`	V1	MongoDB 5.0
`$convert`	V1	MongoDB 5.0
`$count`	V1	MongoDB 6.0
`$covariancePop`	V1	MongoDB 6.0
`$covarianceSamp`	V1	MongoDB 6.0
`$dateAdd`	V1	MongoDB 6.0
`$dateDiff`	V1	MongoDB 6.0
`$dateFromParts`	V1	MongoDB 5.0
`$dateFromString`	V1	MongoDB 5.0
`$dateSubtract`	V1	MongoDB 6.0
`$dateToParts`	V1	MongoDB 5.0
`$dateToString`	V1	MongoDB 5.0
`$dateTrunc`	V1	MongoDB 6.0
`$denseRank`	V1	MongoDB 6.0
`$densify`	V1	MongoDB 6.0
`$derivative`	V1	MongoDB 6.0
`$divide`	V1	MongoDB 5.0
`$documentNumber`	V1	MongoDB 6.0
`$eq`	V1	MongoDB 5.0
`$exp`	V1	MongoDB 5.0
`$expMovingAvg`	V1	MongoDB 6.0
`$filter`	V1	MongoDB 5.0
`$first`	V1	MongoDB 6.0
`$floor`	V1	MongoDB 5.0
`$first`	V1	MongoDB 5.0
`$firstN` (aggregation accumulator)	V1	MongoDB 6.0
`$firstN` (array operator)	V1	MongoDB 6.0
`$getField`	V1	MongoDB 6.0
`$gt`	V1	MongoDB 5.0
`$gte`	V1	MongoDB 5.0
`$ifNull`	V1	MongoDB 5.0
`$in`	V1	MongoDB 5.0
`$indexOfArray`	V1	MongoDB 5.0
`$indexOfBytes`	V1	MongoDB 5.0
`$indexOfCP`	V1	MongoDB 5.0
`$integral`	V1	MongoDB 6.0
`$isArray`	V1	MongoDB 5.0
`$isNumber`	V1	MongoDB 5.0
`$last`	V1	MongoDB 5.0
`$lastN` (aggregation accumulator)	V1	MongoDB 6.0
`$lastN` (array operator)	V1	MongoDB 6.0
`$let`	V1	MongoDB 5.0
`$literal`	V1	MongoDB 5.0
`$locf`	V1	MongoDB 6.0
`$ln`	V1	MongoDB 5.0
`$log`	V1	MongoDB 5.0
`$log10`	V1	MongoDB 5.0
`$lt`	V1	MongoDB 5.0
`$lte`	V1	MongoDB 5.0
`$ltrim`	V1	MongoDB 5.0
`$map`	V1	MongoDB 5.0
`$max`	V1	MongoDB 6.0
`$maxN` (aggregation accumulator)	V1	MongoDB 6.0
`$maxN` (array operator)	V1	MongoDB 6.0
`$mergeObjects`	V1	MongoDB 5.0
`$min`	V1	MongoDB 6.0
`$minN` (aggregation accumulator)	V1	MongoDB 6.0
`$minN` (array operator)	V1	MongoDB 6.0
`$mod`	V1	MongoDB 5.0
`$multiply`	V1	MongoDB 5.0
`$ne`	V1	MongoDB 5.0
`$not`	V1	MongoDB 5.0
`$objectToArray`	V1	MongoDB 5.0
`$or`	V1	MongoDB 5.0
`$pow`	V1	MongoDB 5.0
`$push`	V1	MongoDB 6.0
`$rand`	V1	MongoDB 5.0
`$range`	V1	MongoDB 5.0
`$rank`	V1	MongoDB 6.0
`$reduce`	V1	MongoDB 5.0
`$regexFind`	V1	MongoDB 5.0
`$regexFindAll`	V1	MongoDB 5.0
`$regexMatch`	V1	MongoDB 5.0
`$replaceAll`	V1	MongoDB 5.0
`$replaceOne`	V1	MongoDB 5.0
`$reverseArray`	V1	MongoDB 5.0
`$round`	V1	MongoDB 5.0
`$rtrim`	V1	MongoDB 5.0
`$setDifference`	V1	MongoDB 5.0
`$setEquals`	V1	MongoDB 5.0
`$setField`	V1	MongoDB 6.0
`$setIntersection`	V1	MongoDB 5.0
`$setIsSubset`	V1	MongoDB 5.0
`$setUnion`	V1	MongoDB 5.0
`$setWindowFields`	V1	MongoDB 6.0
`$shift`	V1	MongoDB 6.0
`$slice`	V1	MongoDB 5.0
`$size`	V1	MongoDB 5.0
`$sortArray`	V1	MongoDB 6.0
`$split`	V1	MongoDB 5.0
`$sqrt`	V1	MongoDB 5.0
`$stdDevPop`	V1	MongoDB 6.0
`$stdDevSamp`	V1	MongoDB 6.0
`$strcasecmp`	V1	MongoDB 5.0
`$strLenBytes`	V1	MongoDB 5.0
`$strLenCP`	V1	MongoDB 5.0
`$substr`	V1	MongoDB 5.0
`$substrBytes`	V1	MongoDB 5.0
`$substrCP`	V1	MongoDB 5.0
`$subtract`	V1	MongoDB 5.0
`$sum`	V1	MongoDB 6.0
`$switch`	V1	MongoDB 5.0
`$toLower`	V1	MongoDB 5.0
`$top`	V1	MongoDB 6.0
`$topN`	V1	MongoDB 6.0
`$toUpper`	V1	MongoDB 5.0
`$trim`	V1	MongoDB 5.0
`$trunc`	V1	MongoDB 5.0
`$type`	V1	MongoDB 5.0
`$tsIncrement`	V1	MongoDB 6.0
`$tsSecond`	V1	MongoDB 6.0
`$zip`	V1	MongoDB 5.0

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