Awsflow DynamoDB

Manage DynamoDB tables and items through the awsflow DynamoDBTool.

When to Use This Skill

Use this skill when the user:

•Asks about DynamoDB tables or items
•Wants to query or scan DynamoDB data
•Needs to create, update, or delete tables
•Wants to perform CRUD operations on items (get, put, update, delete)
•Asks about TTL, backups, global tables, or auto-scaling
•Needs to manage table tags

Tool: DynamoDBTool

Execute DynamoDB commands. ALWAYS provide params object.

Commands

ListTables

List DynamoDB tables.

json

{ "command": "ListTables", "params": { "Limit": 100 } }

Parameters:

Parameter	Type	Required	Description
Limit	number	No	Maximum number of tables to return
ExclusiveStartTableName	string	No	Pagination start table name

DescribeTable

Get detailed information about a table.

json

{ "command": "DescribeTable", "params": { "TableName": "my-table" } }

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name

DescribeTimeToLive

Get TTL settings for a table.

json

{ "command": "DescribeTimeToLive", "params": { "TableName": "my-table" } }

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name

DescribeContinuousBackups

Get continuous backup and point-in-time recovery status.

json

{ "command": "DescribeContinuousBackups", "params": { "TableName": "my-table" } }

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name

DescribeTableReplicaAutoScaling

Get auto-scaling settings for table replicas.

json

{ "command": "DescribeTableReplicaAutoScaling", "params": { "TableName": "my-table" } }

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name

Query

Query items by primary key with optional filter expressions.

json

{
  "command": "Query",
  "params": {
    "TableName": "my-table",
    "KeyConditionExpression": "pk = :pk AND begins_with(sk, :prefix)",
    "ExpressionAttributeValues": { ":pk": { "S": "user-123" }, ":prefix": { "S": "order#" } },
    "Limit": 25
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name
KeyConditionExpression	string	Yes (for Query)	Key condition expression
FilterExpression	string	No	Filter expression applied after query
ExpressionAttributeValues	object	No	Expression attribute values map (DynamoDB typed: `{"S":"string"}`, `{"N":"123"}`, `{"BOOL":true}`)
ExpressionAttributeNames	object	No	Expression attribute names map (for reserved words)
IndexName	string	No	Secondary index name (GSI or LSI)
Select	string	No	Projection selection (`ALL_ATTRIBUTES`, `ALL_PROJECTED_ATTRIBUTES`, `COUNT`, `SPECIFIC_ATTRIBUTES`)
Limit	number	No	Maximum items to return

Scan

Scan all items in a table with optional filter.

json

{
  "command": "Scan",
  "params": {
    "TableName": "my-table",
    "FilterExpression": "age > :minAge",
    "ExpressionAttributeValues": { ":minAge": { "N": "30" } },
    "Limit": 100
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name
FilterExpression	string	No	Filter expression
ExpressionAttributeValues	object	No	Expression attribute values map
ExpressionAttributeNames	object	No	Expression attribute names map
IndexName	string	No	Secondary index name
Select	string	No	Projection selection
Limit	number	No	Maximum items to return

GetItem

Get a single item by primary key.

json

{
  "command": "GetItem",
  "params": {
    "TableName": "my-table",
    "Key": { "pk": { "S": "user-123" }, "sk": { "S": "profile" } }
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name
Key	object	Yes	Primary key map (DynamoDB typed values)

PutItem

Create or replace an item.

json

{
  "command": "PutItem",
  "params": {
    "TableName": "my-table",
    "Item": { "pk": { "S": "user-123" }, "sk": { "S": "profile" }, "name": { "S": "John" } }
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name
Item	object	Yes	Item attributes map (DynamoDB typed values)
ConditionExpression	string	No	Condition expression for conditional writes
ExpressionAttributeValues	object	No	Expression attribute values
ExpressionAttributeNames	object	No	Expression attribute names

UpdateItem

Update attributes of an existing item.

json

{
  "command": "UpdateItem",
  "params": {
    "TableName": "my-table",
    "Key": { "pk": { "S": "user-123" }, "sk": { "S": "profile" } },
    "UpdateExpression": "SET #n = :name, age = :age",
    "ExpressionAttributeNames": { "#n": "name" },
    "ExpressionAttributeValues": { ":name": { "S": "Jane" }, ":age": { "N": "25" } }
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name
Key	object	Yes	Primary key map
UpdateExpression	string	No	Update expression (SET, REMOVE, ADD, DELETE)
ConditionExpression	string	No	Condition expression
ExpressionAttributeValues	object	No	Expression attribute values
ExpressionAttributeNames	object	No	Expression attribute names
AttributeUpdates	object	No	Legacy attribute updates map

DeleteItem

Delete an item by primary key.

json

{
  "command": "DeleteItem",
  "params": {
    "TableName": "my-table",
    "Key": { "pk": { "S": "user-123" }, "sk": { "S": "profile" } }
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Target table name
Key	object	Yes	Primary key map
ConditionExpression	string	No	Condition expression
ExpressionAttributeValues	object	No	Expression attribute values
ExpressionAttributeNames	object	No	Expression attribute names

CreateTable

Create a new DynamoDB table.

json

{
  "command": "CreateTable",
  "params": {
    "TableName": "new-table",
    "KeySchema": [{ "AttributeName": "pk", "KeyType": "HASH" }, { "AttributeName": "sk", "KeyType": "RANGE" }],
    "AttributeDefinitions": [{ "AttributeName": "pk", "AttributeType": "S" }, { "AttributeName": "sk", "AttributeType": "S" }],
    "BillingMode": "PAY_PER_REQUEST"
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Table name
KeySchema	array of objects	Yes	Key schema definitions (`HASH` and optional `RANGE`)
AttributeDefinitions	array of objects	Yes	Attribute definitions (`S`, `N`, `B`)
BillingMode	string	No	`PROVISIONED` or `PAY_PER_REQUEST`
ProvisionedThroughput	object	No	Read/write capacity units (required for PROVISIONED)
ExpressionAttributeNames	object	No	Expression attribute names

DeleteTable

Delete a DynamoDB table.

json

{ "command": "DeleteTable", "params": { "TableName": "old-table" } }

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Table name to delete

UpdateTable

Update table settings (billing, GSIs, etc.).

json

{ "command": "UpdateTable", "params": { "TableName": "my-table", "BillingMode": "PAY_PER_REQUEST" } }

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Table name
BillingMode	string	No	`PROVISIONED` or `PAY_PER_REQUEST`
ProvisionedThroughput	object	No	Provisioned throughput config
GlobalSecondaryIndexUpdates	array of objects	No	Updates to GSIs

UpdateTimeToLive

Enable or disable TTL on a table.

json

{
  "command": "UpdateTimeToLive",
  "params": {
    "TableName": "my-table",
    "TimeToLiveSpecification": { "AttributeName": "ttl", "Enabled": true }
  }
}

Parameters:

Parameter	Type	Required	Description
TableName	string	Yes	Table name
TimeToLiveSpecification	object	Yes	TTL specification with `AttributeName` and `Enabled`

ListBackups

List DynamoDB table backups.

json

{ "command": "ListBackups", "params": {} }

Parameters: None required.

ListGlobalTables

List global tables.

json

{ "command": "ListGlobalTables", "params": {} }

Parameters: None required.

ListTagsOfResource

List tags for a DynamoDB resource.

json

{ "command": "ListTagsOfResource", "params": { "ResourceArn": "arn:aws:dynamodb:..." } }

Parameters:

Parameter	Type	Required	Description
ResourceArn	string	Yes	Table resource ARN

Related Services

•DynamoDB → Lambda: DynamoDB Streams trigger Lambda functions. Use LambdaTool ListEventSourceMappings to find stream-triggered functions
•DynamoDB → CloudWatch: DynamoDB metrics (read/write capacity, throttling) are in CloudWatch Metrics
•DynamoDB → IAM: Table access controlled by IAM policies. Use IAMTool SimulatePrincipalPolicy to test access
•DynamoDB → CloudFormation: Tables managed by CloudFormation — use CloudFormationTool DescribeStackResources
•DynamoDB → S3: DynamoDB backups can be exported to S3