JPA 설정(h2) 샘플 (application.yml)

spring:
  datasource:
    url: jdbc:h2:tcp://localhost/~/task_agile_test
    username: sa
    password:
    driver-class-name: org.h2.Driver

  jpa:
    database-platform: org.hibernate.dialect.H2Dialect
    open-in-view: false
    hibernate:
      ddl-auto: create-drop
    properties:
      hibernate:
        show_sql: true
        format_sql: true
        
logging:
  level:
    org.hibernate.type.descriptor.sql: trace

• spring.datasource : DB 연결정보 
• spring.jpa.database-platform : 데이터 플래폼을 지정, 참고 
• spring.jpa.open-in-view : osiv 웹요청이 완료될때까지 영속성을 가짐 (성능상 안 좋음)
• spring.jpa.hibernate.ddl-auto :
• none : No action is performed. The schema will not be generated.
• create : create the schema, the data previously present (if there) in the schema is lost
• create-drop : (default) create the schema with destroying the data previously present(if there). It also drop the database schema when the SessionFactory is closed.
• update : update the schema with the given values.
• validate : validate the schema. It makes no change in the DB.
• spring.jpa.properties.hibernate.format_sql : 실행쿼리를 가독성있게 표현
• spring.jpa.properties.hibernate.show-sql : 콘솔에 jpa 실행쿼리
• logging.level.org.hibernate.type.descriptor.sql : ? 부문을 로그로 출력해줌