https://peter-notes.com/tags/postgresql/Recent content in PostgreSQL on Peter.H's Full-Stack GAMEhttps://peter-notes.com/images/og-image.jpghttps://peter-notes.com/images/og-image.jpgHugozh-twFri, 15 May 2026 00:00:00 +0000https://peter-notes.com/posts/schema-pivot-dual-write-migration/Fri, 15 May 2026 00:00:00 +0000https://peter-notes.com/posts/schema-pivot-dual-write-migration/外部系統匯入的 customers 表跑了三年,現在想換成 SaaS 自己的 users 表為主。Stop-the-world 風險太高,dual-write 過渡是唯一可行解。本文拆解 3 階段 migration、partial cut-over、DISTINCT ON 去重、永久共存政策的設計考量與實戰踩坑。https://peter-notes.com/posts/strapi-v5-populate-silent-failure-with-relation-filters/Fri, 24 Apr 2026 00:00:00 +0000https://peter-notes.com/posts/strapi-v5-populate-silent-failure-with-relation-filters/A reproducible Strapi v5 bug: combining filters[relation][id][$eq] with populate[relation]=true silently returns null for the populated field — no error, no warning, just missing data. This post walks through the symptom, a curl reproduction, why it happens at the ORM layer, and a knex-based custom find controller that fixes it.https://peter-notes.com/posts/database-sync-link-table-pitfall/Tue, 20 Jan 2026 00:00:00 +0000https://peter-notes.com/posts/database-sync-link-table-pitfall/從一次 401 Unauthorized 錯誤出發，深入探討資料庫同步時容易遺漏的 Link Table 問題，以及如何預防這個常見的陷阱https://peter-notes.com/posts/aws-s3-cleanup-pitfall/Sat, 10 Jan 2026 00:00:00 +0000https://peter-notes.com/posts/aws-s3-cleanup-pitfall/接手專案後發現 AWS 遷移不完整，每月多燒 $90。清理過程中發現 Strapi 的 URL 儲存機制比想像中複雜，記錄完整的排查與修復過程。https://peter-notes.com/posts/kubernetes-staging-cost-saving-lesson/Tue, 06 Jan 2026 00:00:00 +0000https://peter-notes.com/posts/kubernetes-staging-cost-saving-lesson/為了節省 Staging 環境費用撰寫開關腳本，卻因共用 nodegroup 導致意外。分享從踩坑到正確實作 nodeSelector 環境隔離的完整過程。https://peter-notes.com/posts/postgresql-vacuum-disk-space/Wed, 31 Dec 2025 00:00:00 +0000https://peter-notes.com/posts/postgresql-vacuum-disk-space/實戰經驗：刪除 52 萬筆通知資料後，資料表從 207MB 完全沒縮小。深入理解 PostgreSQL MVCC 機制，比較 SQLite 的差異，以及為什麼 VACUUM 是每個後端工程師必須知道的知識。https://peter-notes.com/posts/postgresql-sequence-disaster/Sun, 09 Nov 2025 00:00:00 +0000https://peter-notes.com/posts/postgresql-sequence-disaster/記錄一次生產環境中因錯誤部署導致的 PostgreSQL Sequence 不同步問題，包含完整的問題分析、修復過程和預防措施https://peter-notes.com/posts/psql-connect-aws-rds-k8s/Mon, 26 May 2025 00:00:00 +0000https://peter-notes.com/posts/psql-connect-aws-rds-k8s/深度解析如何透過各種方式連線 AWS RDS PostgreSQL，包含直接連線、SSH 隧道、Bastion Host、Docker 容器、Kubernetes Pod，以及完整的 psql 命令參考與安全最佳實踐