Automating Postgres translations with Database Migration Service
In the Medium blog post, "From MARS to SETOF REFCURSOR: Migrating Multi-Result Stored Procedures to PostgreSQL," we explored the fundamental architectural differences between SQL Server and PostgreSQL regarding multiple result sets. We looked at how SQL Server natively streams multiple tabular streams from a single execution, whereas PostgreSQL requires a more deliberate strategy using explicit cursor manipulation.
If you’re facing a massive database migration with hundreds of these procedures, manually rewriting them is a non-starter. This is where automated tools come in. In this post, we’ll explore in detail how Google Cloud’s Database Migration Service (DMS) approaches this exact challenge, the conversion logic it applies under the hood, and how to actually run and test the generated code.
The Core Conversion Strategy of DMS
There are many reasons to migrate your databases to PostgreSQL, including enterprise performance and availability, a thriving developer and user community, and strong AI...
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