udf-judge-conversion

To review a converted UDF safely, evaluate unit tests for edge-case coverage, verify direct CPU versus GPU result parity on identical data, and check the implementation for test-specific literals or host-side row-by-row logic.

A hidden CPU fallback risk occurs when a converted GPU UDF secretly reverts to CPU execution. It is identified during review by scrutinizing implementation files for non-general-purpose logic, host-side processing, or test-tailored behaviors.

Validate CPU and GPU UDF result parity by running comparison tests that execute both paths on the same data and verifying direct output matching. Reviewing these tests ensures the migration handles expected inputs correctly.

Check UDF unit test coverage by evaluating whether the tests truly specify the original CPU behavior across edge cases and expected inputs. Review assertions to ensure they validate actual logic rather than tailored or hardcoded values.

Yes, the UDF conversion review process works for SQL migrations. It evaluates CPU-to-SQL conversion reviews by verifying comparison tests, checking edge-case coverage, and ensuring the SQL path is general-purpose without test-specific literals.

You should not rely solely on automated UDF conversion review when implementation files lack comparison tests or unit tests entirely. The review requires completed migration files to verify edge-case coverage and CPU-versus-GPU parity.