PutItemRequest

This is a legacy parameter. Use ConditionExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.

A condition that must be satisfied in order for a conditional PutItem operation to succeed.

This is a legacy parameter. Use ConditionExpression instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.

One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:

One or more values that can be substituted in an expression.

A map of attribute name/value pairs, one for each attribute. Only the primary key attributes are required; you can optionally provide other attribute name-value pairs for the item.

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

Determines whether item collection metrics are returned. If set to SIZE, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE (the default), no statistics are returned.

Use ReturnValues if you want to get the item attributes as they appeared before they were updated with the PutItem request. For PutItem, the valid values are:

An optional parameter that returns the item attributes for a PutItem operation that failed a condition check.

The name of the table to contain the item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.