Zero-Downtime Database Migration Plan
Design a zero-downtime schema or data migration using the expand-then-contract pattern, with backward compatibility, safe rollback, and verification, without inventing unsupported engine features.
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Model: claude-sonnet-4-7
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Knowledge: 2026-Q2
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Altering a large live table schema without downtime, migrating data between two representations while the app stays up, splitting or retyping a column on a high-load production system safely.
#ترحيل بيانات#بلا انقطاع#توافق خلفي#تراجع آمن
Built-in quality guards
Anti-hallucination
No fabricated statements, options, or lock behavior unsupported by the specified engine
Security Check
Migrate personal data without unauthorized exposure, preserving access controls per PDPL
Completeness
Cover expand, backfill, switch, contract, and rollback without truncation
Format Check
Adherence to six-section structure, SQL statements, and phase table