add DynamoDB expression builder

[rittneje]

Describe the feature

Add an equivalent to the Go SDK's dynamodb/expression package and boto3's dynamodb/conditions package to make it much easier to build conditional expressions.

Use Case

Writing conditional expressions by hand is difficult and hard to read.

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

AWS .NET SDK and/or Package version used

3.7.103.3

Targeted .NET Platform

.NET 6

Operating System and version

Linux

[normj]

Thanks for the feature suggest. The DynamoDB high level libraries is an area we want to do lot of updating. We will include this idea with that work.

[dscpinheiro]

This is available in the latest V4 version of the DynamoDB package: https://www.nuget.org/packages/AWSSDK.DynamoDBv2 (see #3761 for more details).

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