Struct aws_sdk_dynamodb::operation::batch_get_item::builders::BatchGetItemInputBuilder

#[non_exhaustive]
pub struct BatchGetItemInputBuilder { /* private fields */ }

A builder for BatchGetItemInput.

Implementations

impl BatchGetItemInputBuilder

pub fn request_items(self, k: impl Into<String>, v: KeysAndAttributes) -> Self

Adds a key-value pair to request_items.

To override the contents of this collection use set_request_items.

A map of one or more table names or table ARNs and, for each table, a map that describes one or more items to retrieve from that table. Each table name or ARN can be used only once per BatchGetItem request.

Each element in the map of items to retrieve consists of the following:

• ConsistentRead - If true, a strongly consistent read is used; if false (the default), an eventually consistent read is used.

• ExpressionAttributeNames - One or more substitution tokens for attribute names in the ProjectionExpression parameter. The following are some use cases for using ExpressionAttributeNames:

  • To access an attribute whose name conflicts with a DynamoDB reserved word.

  • To create a placeholder for repeating occurrences of an attribute name in an expression.

  • To prevent special characters in an attribute name from being misinterpreted in an expression.

  Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:

  • Percentile

  The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:

  • {"#P":"Percentile"}

  You could then use this substitution in an expression, as in this example:

  • #P = :val

  Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.

  For more information about expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.

• Keys - An array of primary key attribute values that define specific items in the table. For each primary key, you must provide all of the key attributes. For example, with a simple primary key, you only need to provide the partition key value. For a composite key, you must provide both the partition key value and the sort key value.

• ProjectionExpression - A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.

  If no attribute names are specified, then all attributes are returned. If any of the requested attributes are not found, they do not appear in the result.

  For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.

• AttributesToGet - This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.

pub fn set_request_items( self, input: Option<HashMap<String, KeysAndAttributes>>, ) -> Self

A map of one or more table names or table ARNs and, for each table, a map that describes one or more items to retrieve from that table. Each table name or ARN can be used only once per BatchGetItem request.

Each element in the map of items to retrieve consists of the following:

• ConsistentRead - If true, a strongly consistent read is used; if false (the default), an eventually consistent read is used.

• ExpressionAttributeNames - One or more substitution tokens for attribute names in the ProjectionExpression parameter. The following are some use cases for using ExpressionAttributeNames:

  • To access an attribute whose name conflicts with a DynamoDB reserved word.

  • To create a placeholder for repeating occurrences of an attribute name in an expression.

  • To prevent special characters in an attribute name from being misinterpreted in an expression.

  Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:

  • Percentile

  The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:

  • {"#P":"Percentile"}

  You could then use this substitution in an expression, as in this example:

  • #P = :val

  Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.

  For more information about expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.

• Keys - An array of primary key attribute values that define specific items in the table. For each primary key, you must provide all of the key attributes. For example, with a simple primary key, you only need to provide the partition key value. For a composite key, you must provide both the partition key value and the sort key value.

• ProjectionExpression - A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.

  If no attribute names are specified, then all attributes are returned. If any of the requested attributes are not found, they do not appear in the result.

  For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.

• AttributesToGet - This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.

pub fn get_request_items(&self) -> &Option<HashMap<String, KeysAndAttributes>>

A map of one or more table names or table ARNs and, for each table, a map that describes one or more items to retrieve from that table. Each table name or ARN can be used only once per BatchGetItem request.

Each element in the map of items to retrieve consists of the following:

• ConsistentRead - If true, a strongly consistent read is used; if false (the default), an eventually consistent read is used.

• ExpressionAttributeNames - One or more substitution tokens for attribute names in the ProjectionExpression parameter. The following are some use cases for using ExpressionAttributeNames:

  • To access an attribute whose name conflicts with a DynamoDB reserved word.

  • To create a placeholder for repeating occurrences of an attribute name in an expression.

  • To prevent special characters in an attribute name from being misinterpreted in an expression.

  Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:

  • Percentile

  The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:

  • {"#P":"Percentile"}

  You could then use this substitution in an expression, as in this example:

  • #P = :val

  Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.

  For more information about expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.

• Keys - An array of primary key attribute values that define specific items in the table. For each primary key, you must provide all of the key attributes. For example, with a simple primary key, you only need to provide the partition key value. For a composite key, you must provide both the partition key value and the sort key value.

• ProjectionExpression - A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.

  If no attribute names are specified, then all attributes are returned. If any of the requested attributes are not found, they do not appear in the result.

  For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.

• AttributesToGet - This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.

pub fn return_consumed_capacity(self, input: ReturnConsumedCapacity) -> Self

Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:

• INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.

  Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).

• TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.

• NONE - No ConsumedCapacity details are included in the response.

pub fn set_return_consumed_capacity( self, input: Option<ReturnConsumedCapacity>, ) -> Self

Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:

• INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.

  Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).

• TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.

• NONE - No ConsumedCapacity details are included in the response.

pub fn get_return_consumed_capacity(&self) -> &Option<ReturnConsumedCapacity>

Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:

• INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.

  Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).

• TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.

• NONE - No ConsumedCapacity details are included in the response.

pub fn build(self) -> Result<BatchGetItemInput, BuildError>

Consumes the builder and constructs a BatchGetItemInput.

impl BatchGetItemInputBuilder

pub async fn send_with( self, client: &Client, ) -> Result<BatchGetItemOutput, SdkError<BatchGetItemError, HttpResponse>>

Sends a request with this input using the given client.

Trait Implementations

impl Clone for BatchGetItemInputBuilder

fn clone(&self) -> BatchGetItemInputBuilder

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BatchGetItemInputBuilder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BatchGetItemInputBuilder

fn default() -> BatchGetItemInputBuilder

Returns the “default value” for a type.

impl PartialEq for BatchGetItemInputBuilder

fn eq(&self, other: &BatchGetItemInputBuilder) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for BatchGetItemInputBuilder