High-Performance
Backend Systems & Scalable MVPs That Never Break.

-- 2. TailoredCore Solution: Zero-Downtime Concurrent Composite Index
CREATE INDEX CONCURRENTLY idx_tx_org_status_created 
ON transactions (org_id, status, created_at DESC) 
INCLUDE (amount_cents);

-- Execution Plan After Optimization:
EXPLAIN (ANALYZE, BUFFERS, TIMING)
SELECT id, org_id, amount_cents, status, created_at
FROM transactions
WHERE org_id = 'org_9821a'
  AND created_at >= NOW() - INTERVAL '30 days'
  AND status = 'COMPLETED'
ORDER BY created_at DESC
LIMIT 50;

-- Output: Index-Only Scan with Zero Heap Page Fetches
-> Limit (cost=0.43..12.85 rows=50 width=48)
    -> Index Only Scan using idx_tx_org_status_created on transactions (cost=0.43..12.85)
        Index Cond: ((org_id = 'org_9821a') AND (status = 'COMPLETED') AND (created_at >= ...))
        Heap Fetches: 0
        Buffers: shared hit=8 read=0
Planning Time: 0.112 ms
Execution Time: 1.182 ms -- [99.8% FASTER: Latency SLA Guaranteed]