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. A TransactGetItems call can contain up to
25 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 TransactGetItems cannot retrieve items from tables
in more than one AWS account or Region. The aggregate size of the items
in the transaction cannot exceed 4 MB.
dynamodb_transact_get_items(TransactItems, ReturnConsumedCapacity)[required] An ordered array of up to 25 TransactGetItem objects, each of which
contains a Get structure.
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.
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"
)
All AWS Regions and AWS GovCloud (US) support up to 25 items per transaction with up to 4 MB of data, except the following AWS Regions:
China (Beijing)
China (Ningxia)
The China (Beijing) and China (Ningxia) Regions support up to 10 items per transaction with up to 4 MB of data.
DynamoDB rejects the entire TransactGetItems 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 cannot exceed 4 MB.