db.getCollectionNames()

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Definition

Required Access
Behavior
Example

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Definition

db.getCollectionNames(): Returns an array containing the names of all collections and views in the current database, or if running with access control, the names of the collections according to user's privilege. For details, see Required Access.

Required Access

The db.getCollectionNames() is equivalent to:

db.runCommand(
   {
       listCollections: 1.0,
       authorizedCollections: true,
       nameOnly: true
   }
)

For users with the required access (privileges that grant listCollections action on the database), the method lists the names of all collections for the database.
For users without the required access, the method lists only the collections for which the users has privileges. For example, if a user has find on a specific collection in a database, the method would return just that collection.

Behavior

Client Disconnection

Starting in MongoDB 4.2, if the client that issued db.getCollectionNames() disconnects before the operation completes, MongoDB marks db.getCollectionNames() for termination using killOp.

Replica Set Member State Restriction

Starting in MongoDB 4.4, to run on a replica set member, listCollections operations require the member to be in PRIMARY or SECONDARY state. If the member is in another state, such as STARTUP2, the operation errors.

In previous versions, the operations also run when the member is in STARTUP2. The operations wait until the member transitioned to RECOVERING.

Example

The following returns the names of all collections in the records database:

use records
db.getCollectionNames()

The method returns the names of the collections in an array:

[ "employees", "products", "mylogs", "system.indexes" ]

Back

db.getCollectionInfos()

db.getLastError()