5146. Metadata & Governance: trigger inventory — Reduce cost/latency while preserving semantics. — e-commerce — PHP PDO

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

Scenario: A e-commerce application must handle trigger inventory. Reduce cost/latency while preserving semantics. 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

Verified

Option 1: Disable database protections and repair inconsistent rows manually after trigger

Disable database protections and repair inconsistent rows manually after trigger inventory runs.

Additional Explanation

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

Verified

Option 2: Run trigger inventory without defining transaction boundaries, retry behavior, o

Run trigger inventory 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 3: Use a parameterized, transaction-aware MySQL 8 implementation for trigger invent

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

Additional Explanation

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

Verified

Option 4: Use unparameterized dynamic SQL and rely only on application-side validation for

Use unparameterized dynamic SQL and rely only on application-side validation for trigger inventory.

Additional Explanation

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