Struct rusoto_dynamodb::QueryOutput [−][src]
pub struct QueryOutput { pub consumed_capacity: Option<ConsumedCapacity>, pub count: Option<i64>, pub items: Option<Vec<HashMap<String, AttributeValue>>>, pub last_evaluated_key: Option<HashMap<String, AttributeValue>>, pub scanned_count: Option<i64>, }
Expand description
Represents the output of a Query
operation.
Fields
consumed_capacity: Option<ConsumedCapacity>
The capacity units consumed by the Query
operation. The data returned includes the total provisioned throughput consumed, along with statistics for the table and any indexes involved in the operation. ConsumedCapacity
is only returned if the ReturnConsumedCapacity
parameter was specified. For more information, see Provisioned Throughput in the Amazon DynamoDB Developer Guide.
count: Option<i64>
The number of items in the response.
If you used a QueryFilter
in the request, then Count
is the number of items returned after the filter was applied, and ScannedCount
is the number of matching items before the filter was applied.
If you did not use a filter in the request, then Count
and ScannedCount
are the same.
items: Option<Vec<HashMap<String, AttributeValue>>>
An array of item attributes that match the query criteria. Each element in this array consists of an attribute name and the value for that attribute.
last_evaluated_key: Option<HashMap<String, AttributeValue>>
The primary key of the item where the operation stopped, inclusive of the previous result set. Use this value to start a new operation, excluding this value in the new request.
If LastEvaluatedKey
is empty, then the "last page" of results has been processed and there is no more data to be retrieved.
If LastEvaluatedKey
is not empty, it does not necessarily mean that there is more data in the result set. The only way to know when you have reached the end of the result set is when LastEvaluatedKey
is empty.
scanned_count: Option<i64>
The number of items evaluated, before any QueryFilter
is applied. A high ScannedCount
value with few, or no, Count
results indicates an inefficient Query
operation. For more information, see Count and ScannedCount in the Amazon DynamoDB Developer Guide.
If you did not use a filter in the request, then ScannedCount
is the same as Count
.
Trait Implementations
Returns the “default value” for a type. Read more
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for QueryOutput
impl Send for QueryOutput
impl Sync for QueryOutput
impl Unpin for QueryOutput
impl UnwindSafe for QueryOutput
Blanket Implementations
Mutably borrows from an owned value. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
type Output = T
type Output = T
Should always be Self