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Migrate CLR code to AWS Lambda when upgrading Amazon RDS for SQL Server to 2025

calendar_today October 12, 2026 person Raunak Gupta domain amazon-dms

After upgrading Amazon RDS for SQL Server to 2017 or later, CLR strict security leaves user-defined CLR assemblies unusable. This post shows how to migrate CLR logic with no native T-SQL equivalent to an AWS Lambda function, invoked from SQL Server 2025 through sp_invoke_external_rest_endpoint behind Amazon API Gateway.

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