Add create an AddOperationItem object to representing a single `ADD` action https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.UpdateExpressions.html#Expressions.UpdateExpressions.ADD.

Addition creates a AdditionOperationItem representing a `operand + operand` DynamoDB expression.

Delete create a DeleteOperationItem object, representing a single `DELETE` action https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.UpdateExpressions.html#Expressions.UpdateExpressions.DELETE.

IfNotExists creates an IfNotExistsOperationItem object representing a `if_not_exists(path, value)` DynamoDB expression.

ListAppend creates a ListAppendOperationItem representing a `list_append(path, values)` DynamoDB expression.

Set creates a SetOperationItem object representing a `SET p = value` DynamoDB expression value can be a scalar, or it can be a ValueOperation or SetFunctionOperationItem https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.UpdateExpressions.html#Expressions.UpdateExpressions.SET.

SetDecrement decrements attribute This operation create a SetOperationItem representing `path = path - value` as DynamoDB expression value could be a scalar or an Operand.

SetIfNotExists set attribute if not exist.

SetIncrement increment attribute This operation create a SetOperationItem representing `path = path + value` as DynamoDB expression value could be a scalar or an Operand.

SetUpsertToList upsert values to a list.

Subtraction creates a SubtractionOperationItem representing a `operand + operand` DynamoDB expression.