Use UpdateExpression instead of AttributeUpdates in StandardSessionConnection

[gregtyler]

Describe the feature

When StandardSessionConnection writes, it uses AttributeUpdates to determine which fields to update. According to the docs this is a legacy parameter and UpdateExpression should be used instead.

Use Case

This specifically came up because DynamoDB local v3 (incorrectly?) requires the Action to be set when updating an attribute that isn't yet on the item. It would be ideal to fix DynamoDB local instead, but I also imagine that aws-sdk-php would want to use non-legacy features of the API.

Proposed Solution

No response

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

SDK version used

3.356.8

Environment details (Version of PHP (php -v)? OS name and version, etc.)

PHP 8.3.25 on Alpine 3.22.1

[stobrien89]

Hi @gregtyler,

Thanks for pointing this out. This is something we'd be willing to do, but it seems like we would want to introduce another method (i.e. writeWithUpdateExpression()) to maintain backward compatibility.