> For the complete documentation index, see [llms.txt](https://docs.thingsup.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thingsup.io/actions/dynamodb-scan-action.md).

# DynamoDB Scan Action

It provides a way to perform a scan in DynamoDB. Before adding DynamoDB Scan Action, user has to define a [**AWS Connection**](/connections/aws-connection.md). User need to provide following parameters to add DynamoDB Scan Action.

#### TableName

User's DynamoDB Tablename

#### Function

* JavaScript code to Scan "DynamoDB". 
* "payload" object and "params" object is available in this code. params object should hold key-value data pairs as mentioned in [AWS Doc](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#scan-property). "payload" object is supplied from Action Trigger like Rules, Action Command etc.
*  Any params passed through Function will override parameters passed through form.

#### Connection ID

Connection ID of AWS Connection.

#### Limit

User can set limit here.

#### ExpressionAttributeValues

User can provide a ExpressionAttributeValues here. Check [AWS Doc](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#scan-property) for more information.

#### ExpressionAttributeNames

User can provide a ExpressionAttributeNames here. Check [AWS Doc](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#scan-property) for more information.

#### FilterExpression

User can provide a FilterExpression here. Check [AWS Doc](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#scan-property) for more information.

#### ProjectionExpression

User can provide a ProjectionExpression here. Check [AWS Doc](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html#scan-property) for more information.

```
//Example 1
//Let "id" and "name" are the column names inside DynamoDB table.
//It contains a entry having id=1 and name="abc"
//Following are the fields you need mention in form to get the entry from table id having value 1.

{"#a":"id"}   //ExpressionAttributeNames
{":id" : 1}   //ExpressionAttributeValues
#a = :id      //FilterExpression
```

```
//Example 2
//Let "id" and "name" are the column names inside DynamoDB table.
//It contains a entry having id=1 and name="abc"
//Following are the fields you need mention in form to get the entries from table id having value greater than 1.

{"#a":"id"}   //ExpressionAttributeNames
{":id" : 1}   //ExpressionAttributeValues
#a > :id      //FilterExpression

//you can use limit parameter to set limit.
```

![Add DynamoDB Scan Action](/files/zijOfYgpJELu3qJHJgQu)

Please note the following points:

{% hint style="info" %}

* "payload" object is supplied from Action Trigger like Rules, Action Command etc.
* Data Response of Scan will be available as Action Response.
  {% endhint %}