Amazon DynamoDB

Amazon DynamoDB stores items in tables identified by primary keys. Use Get to read an item, Put to insert or replace one, Update to change attributes, and Delete to remove it. Query a table or index by key conditions; use Scan when you need to inspect items across the table. The integration also reads table metadata and uses AWS access-key credentials.

Usage Instructions

Integrate Amazon DynamoDB into workflows. Supports Get, Put, Query, Scan, Update, Delete, and Introspect operations on DynamoDB tables.

Actions

DynamoDB Get

Get an item from a DynamoDB table by primary key

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	Yes	DynamoDB table name (e.g., "Users", "Orders")
`key`	json	Yes	Primary key of the item to retrieve (e.g., {"pk": "USER#123"} or {"pk": "ORDER#456", "sk": "ITEM#789"})
`consistentRead`	boolean	No	Use strongly consistent read

Output

Parameter	Type	Description
`message`	string	Operation status message
`item`	json	Retrieved item

DynamoDB Put

Put an item into a DynamoDB table

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	Yes	DynamoDB table name (e.g., "Users", "Orders")
`item`	json	Yes	Item to put into the table (e.g., {"pk": "USER#123", "name": "John", "email": "john@example.com"})
`conditionExpression`	string	No	Condition that must be met for the put to succeed (e.g., "attribute_not_exists(pk)" to prevent overwrites)
`expressionAttributeNames`	json	No	Attribute name mappings for reserved words used in conditionExpression (e.g., {"#name": "name"})
`expressionAttributeValues`	json	No	Expression attribute values used in conditionExpression (e.g., {":expected": "value"})

Output

Parameter	Type	Description
`message`	string	Operation status message
`item`	json	Created item

DynamoDB Query

Query items from a DynamoDB table using key conditions

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	Yes	DynamoDB table name (e.g., "Users", "Orders")
`keyConditionExpression`	string	Yes	Key condition expression (e.g., "pk = :pk" or "pk = :pk AND sk BEGINS_WITH :prefix")
`filterExpression`	string	No	Filter expression for results (e.g., "age > :minAge AND #status = :status")
`expressionAttributeNames`	json	No	Attribute name mappings for reserved words (e.g., {"#status": "status"})
`expressionAttributeValues`	json	No	Expression attribute values (e.g., {":pk": "USER#123", ":minAge": 18})
`indexName`	string	No	Secondary index name to query (e.g., "GSI1", "email-index")
`limit`	number	No	Maximum number of items to return (e.g., 10, 50, 100)
`exclusiveStartKey`	json	No	Pagination token from a previous query's lastEvaluatedKey to continue fetching results
`scanIndexForward`	boolean	No	Sort order for the sort key: true for ascending (default), false for descending

Output

Parameter	Type	Description
`message`	string	Operation status message
`items`	array	Array of items returned
`count`	number	Number of items returned
`lastEvaluatedKey`	json	Pagination token to pass as exclusiveStartKey to fetch the next page of results

DynamoDB Scan

Scan all items in a DynamoDB table

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	Yes	DynamoDB table name (e.g., "Users", "Orders")
`filterExpression`	string	No	Filter expression for results (e.g., "age > :minAge AND #status = :status")
`projectionExpression`	string	No	Attributes to retrieve (e.g., "pk, sk, #name, email")
`expressionAttributeNames`	json	No	Attribute name mappings for reserved words (e.g., {"#name": "name", "#status": "status"})
`expressionAttributeValues`	json	No	Expression attribute values (e.g., {":minAge": 18, ":status": "active"})
`limit`	number	No	Maximum number of items to return (e.g., 10, 50, 100)
`exclusiveStartKey`	json	No	Pagination token from a previous scan's lastEvaluatedKey to continue fetching results

Output

Parameter	Type	Description
`message`	string	Operation status message
`items`	array	Array of items returned
`count`	number	Number of items returned
`lastEvaluatedKey`	json	Pagination token to pass as exclusiveStartKey to fetch the next page of results

DynamoDB Update

Update an item in a DynamoDB table

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	Yes	DynamoDB table name (e.g., "Users", "Orders")
`key`	json	Yes	Primary key of the item to update (e.g., {"pk": "USER#123"} or {"pk": "ORDER#456", "sk": "ITEM#789"})
`updateExpression`	string	Yes	Update expression (e.g., "SET #name = :name, age = :age" or "SET #count = #count + :inc")
`expressionAttributeNames`	json	No	Attribute name mappings for reserved words (e.g., {"#name": "name", "#count": "count"})
`expressionAttributeValues`	json	No	Expression attribute values (e.g., {":name": "John", ":age": 30, ":inc": 1})
`conditionExpression`	string	No	Condition that must be met for the update to succeed (e.g., "attribute_exists(pk)" or "version = :expectedVersion")

Output

Parameter	Type	Description
`message`	string	Operation status message
`item`	json	Updated item with all attributes

DynamoDB Delete

Delete an item from a DynamoDB table

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	Yes	DynamoDB table name (e.g., "Users", "Orders")
`key`	json	Yes	Primary key of the item to delete (e.g., {"pk": "USER#123"} or {"pk": "ORDER#456", "sk": "ITEM#789"})
`conditionExpression`	string	No	Condition that must be met for the delete to succeed (e.g., "attribute_exists(pk)")
`expressionAttributeNames`	json	No	Attribute name mappings for reserved words used in conditionExpression (e.g., {"#status": "status"})
`expressionAttributeValues`	json	No	Expression attribute values used in conditionExpression (e.g., {":status": "active"})

Output

Parameter	Type	Description
`message`	string	Operation status message

DynamoDB Introspect

Introspect DynamoDB to list tables or get detailed schema information for a specific table

Input

Parameter	Type	Required	Description
`region`	string	Yes	AWS region (e.g., us-east-1)
`accessKeyId`	string	Yes	AWS access key ID
`secretAccessKey`	string	Yes	AWS secret access key
`tableName`	string	No	Optional table name to get detailed schema (e.g., "Users", "Orders"). If not provided, lists all tables.

Output

Parameter	Type	Description
`message`	string	Operation status message
`tables`	array	List of table names in the region
`tableDetails`	json	Detailed schema information for a specific table

Amazon DynamoDB

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