|o||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:
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:
You could then use this substitution in an expression, as in this example:
For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
|o||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 hash type primary key, you only need to provide the hash attribute. For a hash-and-range type primary key, you must provide both the hash attribute and the range attribute.|
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.
For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
This is a legacy parameter, for backward compatibility. New applications should use ProjectionExpression instead. Do not combine legacy parameters and expression parameters in a single API call; otherwise, DynamoDB will return a ValidationException exception.
This parameter allows you to retrieve attributes of type List or Map; however, it cannot retrieve individual elements within a List or a Map.
The names of one or more attributes to retrieve. If no attribute names are provided, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
Note that AttributesToGet has no effect on provisioned throughput consumption. DynamoDB determines capacity units consumed based on item size, not on the amount of data that is returned to an application.
The source code is located here: https://github.com/pplu/aws-sdk-perl
Please report bugs to: https://github.com/pplu/aws-sdk-perl/issues
Hey! <B>The above document had some coding errors, which are explained below:B>
Around line 79: Unterminated B<...> sequence Around line 98: Unterminated C<...> sequence Around line 109: Unterminated C<...> sequence
|perl v5.20.3||PAWS::DYNAMODB::BATCHGETITEM (3)||2015-08-06|