Chaos and Order https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Tue, 16 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/database/2026-06-16-database-engine-migration-oracle-postgres.en Cross-Engine Database Migration — From Oracle to PostgreSQL (and Beyond) https://www.youngju.dev/blog/database/2026-06-16-database-engine-migration-oracle-postgres.en We unpack cross-engine database migration from Oracle to PostgreSQL, starting with the real motivations of licensing and cloud. The post covers the differences between PL/SQL and PL/pgSQL, compatibility gaps in data types, sequences, and hints, schema conversion tools like ora2pg and AWS SCT, data migration, application SQL rewrites, validation and performance regression, phased migration with a real case study, and finally the pitfalls and a checklist, all from a practical standpoint. Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) postgresqloracledatabasemigrationora2pgplpgsqlaws-dms https://www.youngju.dev/blog/database/2026-06-16-database-engine-migration-oracle-postgres.ja 異種DBエンジン移行 — OracleからPostgreSQLへ（そしてその先へ） https://www.youngju.dev/blog/database/2026-06-16-database-engine-migration-oracle-postgres.ja OracleからPostgreSQLへの異種データベースエンジン移行を、ライセンスとクラウドという本当の動機から解きほぐします。PL/SQLとPL/pgSQLの違い、データ型やシーケンスやヒントの互換性ギャップ、ora2pgやAWS SCTといったスキーマ変換ツール、データ移行、アプリケーションSQLの書き換え、検証と性能リグレッション、段階的移行と実際の事例、そして落とし穴とチェックリストまで実務の観点で整理します。 Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) postgresqloracledatabasemigrationora2pgplpgsqlaws-dms https://www.youngju.dev/blog/database/2026-06-16-database-engine-migration-oracle-postgres 이기종 DB 엔진 전환 — Oracle에서 PostgreSQL로 (와 그 너머) https://www.youngju.dev/blog/database/2026-06-16-database-engine-migration-oracle-postgres Oracle에서 PostgreSQL로의 이기종 데이터베이스 엔진 전환을 라이선스와 클라우드라는 동기부터 풀어봅니다. PL/SQL과 PL/pgSQL의 차이, 데이터 타입과 시퀀스와 힌트의 호환성 격차, ora2pg와 AWS SCT 같은 스키마 변환 도구, 데이터 마이그레이션, 애플리케이션 SQL 재작성, 검증과 성능 회귀, 단계적 전환 전략과 실제 사례, 그리고 함정과 체크리스트까지 실무 관점에서 정리합니다. Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) postgresqloracledatabasemigrationora2pgplpgsqlaws-dms