Put Attributes

simpledb_put_attributes

R Documentation

The PutAttributes operation creates or replaces attributes in an item

Description

The PutAttributes operation creates or replaces attributes in an item. The client may specify new attributes using a combination of the Attribute.X.Name and Attribute.X.Value parameters. The client specifies the first attribute by the parameters Attribute.0.Name and Attribute.0.Value, the second attribute by the parameters Attribute.1.Name and Attribute.1.Value, and so on.

Attributes are uniquely identified in an item by their name/value combination. For example, a single item can have the attributes ⁠{ "first_name", "first_value" }⁠ and ⁠{ \"first_name\", second_value\" }⁠. However, it cannot have two attribute instances where both the Attribute.X.Name and Attribute.X.Value are the same.

Optionally, the requestor can supply the Replace parameter for each individual attribute. Setting this value to true causes the new attribute value to replace the existing attribute value(s). For example, if an item has the attributes ⁠{ 'a', '1' }⁠, ⁠{ 'b', '2'}⁠ and ⁠{ 'b', '3' }⁠ and the requestor calls put_attributes using the attributes ⁠{ 'b', '4' }⁠ with the Replace parameter set to true, the final attributes of the item are changed to ⁠{ 'a', '1' }⁠ and ⁠{ 'b', '4' }⁠, which replaces the previous values of the 'b' attribute with the new value.

Using put_attributes to replace attribute values that do not exist will not result in an error response.

You cannot specify an empty string as an attribute name.

Because Amazon SimpleDB makes multiple copies of client data and uses an eventual consistency update model, an immediate get_attributes or select operation (read) immediately after a put_attributes or delete_attributes operation (write) might not return the updated data.

The following limitations are enforced for this operation:

• 256 total attribute name-value pairs per item

• One billion attributes per domain

• 10 GB of total user data storage per domain

Usage

simpledb_put_attributes(DomainName, ItemName, Attributes, Expected)

Arguments

DomainName

[required] The name of the domain in which to perform the operation.

ItemName

[required] The name of the item.

Attributes

[required] The list of attributes.

Expected

The update condition which, if specified, determines whether the specified attributes will be updated or not. The update condition must be satisfied in order for this request to be processed and the attributes to be updated.

Value

An empty list.

Request syntax

svc$put_attributes(
  DomainName = "string",
  ItemName = "string",
  Attributes = list(
    list(
      Name = "string",
      Value = "string",
      Replace = TRUE|FALSE
    )
  ),
  Expected = list(
    Name = "string",
    Value = "string",
    Exists = TRUE|FALSE
  )
)