---
title: "system.mongodb.listCollectionNames"
description: "Returns a list of all collection names."
---

# system.mongodb.listCollectionNames

> Returns a list of all collection names.

This function is used in **Python Scripting**.

:::note
Project Library scripts will not provide hints for MongoDB system functions unless the Script Hint Scope is set to **Gateway**. See the [Scripting in Ignition](platform\scripting\scripting-in-ignition\scripting-in-ignition.md#system-functions-hints-and-autocomplete) page for more details on scripting hints.
:::

## Description
## Client Permission Restrictions
This scripting function has no [Client Permission](../../../ignition-modules/vision/vision-project-properties/vision-project-properties.md#vision-permissions-properties) restrictions.

## Syntax
`system.mongodb.listCollectionNames(connector)`

### Parameters
Type | Parameter | Description 
------- | ------- | ------
String | `connector` | Name of connector (case-insensitive).

### Returns
**List[String]** `collectionNames` - A List of all collection names.

### Scope
Gateway, Perspective Session

## Code Examples
```python title="Example #1"
# Retrieve a connector name to query from.

connectorList = system.mongodb.listConnectorInfo()

# Iterate through the list of connectors and print out all collection names found.
for connector in connectorList:
    print system.mongodb.listCollectionNames(connector['name'])
```