Transact Get Items

dynamodb_transact_get_items

R Documentation

TransactGetItems is a synchronous operation that atomically retrieves multiple items from one or more tables (but not from indexes) in a single account and Region

Description

transact_get_items is a synchronous operation that atomically retrieves multiple items from one or more tables (but not from indexes) in a single account and Region. A transact_get_items call can contain up to 100 TransactGetItem objects, each of which contains a Get structure that specifies an item to retrieve from a table in the account and Region. A call to transact_get_items cannot retrieve items from tables in more than one Amazon Web Services account or Region. The aggregate size of the items in the transaction cannot exceed 4 MB.

DynamoDB rejects the entire transact_get_items request if any of the following is true:

• A conflicting operation is in the process of updating an item to be read.

• There is insufficient provisioned capacity for the transaction to be completed.

• There is a user error, such as an invalid data format.

• The aggregate size of the items in the transaction exceeded 4 MB.

Usage

dynamodb_transact_get_items(TransactItems, ReturnConsumedCapacity)

Arguments

TransactItems

[required] An ordered array of up to 100 TransactGetItem objects, each of which contains a Get structure.

ReturnConsumedCapacity

A value of TOTAL causes consumed capacity information to be returned, and a value of NONE prevents that information from being returned. No other value is valid.

Value

A list with the following syntax:

list(
  ConsumedCapacity = list(
    list(
      TableName = "string",
      CapacityUnits = 123.0,
      ReadCapacityUnits = 123.0,
      WriteCapacityUnits = 123.0,
      Table = list(
        ReadCapacityUnits = 123.0,
        WriteCapacityUnits = 123.0,
        CapacityUnits = 123.0
      ),
      LocalSecondaryIndexes = list(
        list(
          ReadCapacityUnits = 123.0,
          WriteCapacityUnits = 123.0,
          CapacityUnits = 123.0
        )
      ),
      GlobalSecondaryIndexes = list(
        list(
          ReadCapacityUnits = 123.0,
          WriteCapacityUnits = 123.0,
          CapacityUnits = 123.0
        )
      )
    )
  ),
  Responses = list(
    list(
      Item = list(
        list(
          S = "string",
          N = "string",
          B = raw,
          SS = list(
            "string"
          ),
          NS = list(
            "string"
          ),
          BS = list(
            raw
          ),
          M = list(
            list()
          ),
          L = list(
            list()
          ),
          NULL = TRUE|FALSE,
          BOOL = TRUE|FALSE
        )
      )
    )
  )
)

Request syntax

svc$transact_get_items(
  TransactItems = list(
    list(
      Get = list(
        Key = list(
          list(
            S = "string",
            N = "string",
            B = raw,
            SS = list(
              "string"
            ),
            NS = list(
              "string"
            ),
            BS = list(
              raw
            ),
            M = list(
              list()
            ),
            L = list(
              list()
            ),
            NULL = TRUE|FALSE,
            BOOL = TRUE|FALSE
          )
        ),
        TableName = "string",
        ProjectionExpression = "string",
        ExpressionAttributeNames = list(
          "string"
        )
      )
    )
  ),
  ReturnConsumedCapacity = "INDEXES"|"TOTAL"|"NONE"
)