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  1. Actions

DynamoDB Scan Action

Execute DynamoDB Scan query completely serverless via Thingsup IoT Platform. Create custom query from MQTT Rules Engine or HTTP APIs.

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Last updated 3 years ago

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It provides a way to perform a scan in DynamoDB. Before adding DynamoDB Scan Action, user has to define a . 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 . "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 for more information.

ExpressionAttributeNames

User can provide a ExpressionAttributeNames here. Check for more information.

FilterExpression

ProjectionExpression

//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.

Please note the following points:

  • "payload" object is supplied from Action Trigger like Rules, Action Command etc.

  • Data Response of Scan will be available as Action Response.

User can provide a FilterExpression here. Check for more information.

User can provide a ProjectionExpression here. Check for more information.

AWS Connection
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AWS Doc
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AWS Doc
Add DynamoDB Scan Action