5637. Online Schema Changes: DDL throttling — Harden the workflow against privilege or data-exposure risks. — finance — Node.js + Express + mysql2

DBMS Published 30 Sept 2026 Updated 30 Sept 2026 0 Views Verified

Scenario: A finance application must handle DDL throttling. Harden the workflow against privilege or data-exposure risks. Explain the invariant, SQL strategy, transaction/locking behavior, failure handling, observability and test plan. Use MySQL 8-oriented syntax where applicable.

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Answer & Explanation

4 Answers

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Option 1: Use unparameterized dynamic SQL and rely only on application-side validation for

Use unparameterized dynamic SQL and rely only on application-side validation for DDL throttling.

Additional Explanation

Correctness depends on explicit invariants, safe SQL, transaction/concurrency handling and verification.

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Option 2: Disable database protections and repair inconsistent rows manually after DDL thr

Disable database protections and repair inconsistent rows manually after DDL throttling runs.

Additional Explanation

Correctness depends on explicit invariants, safe SQL, transaction/concurrency handling and verification.

Verified

Option 3: Run DDL throttling without defining transaction boundaries, retry behavior, or p

Run DDL throttling without defining transaction boundaries, retry behavior, or production validation.

Additional Explanation

Correctness depends on explicit invariants, safe SQL, transaction/concurrency handling and verification.

Verified Correct Answer

Option 4: Use a parameterized, transaction-aware MySQL 8 implementation for DDL throttling

Use a parameterized, transaction-aware MySQL 8 implementation for DDL throttling, validate the invariant, and explicitly test concurrency, retries and recovery.

Additional Explanation

Correctness depends on explicit invariants, safe SQL, transaction/concurrency handling and verification.