Update

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

One or more substitution tokens for attribute names in an expression.

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

The primary key of the item to be updated. Each element consists of an attribute name and a value for that attribute.

Use ReturnValuesOnConditionCheckFailure to get the item attributes if the Update condition fails. For ReturnValuesOnConditionCheckFailure, the valid values are: NONE and ALL_OLD.

Name of the table for the UpdateItem request. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

An expression that defines one or more attributes to be updated, the action to be performed on them, and new value(s) for them.