EclipseLinkJpaVendorAdapter對Oracle資料庫PLSQL支援較佳

開發Spring Data JPA一般會使用HibernateJpaVendorAdapter，但是如果Oracle資料庫會使用EclipseLinkJpaVendorAdapter，對PLSQL支援較佳

ref:
https://www.eclipse.org/eclipselink/documentation/2.5/solutions/oracledb002.htm#CHDDCIEC

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/orm/jpa/vendor/EclipseLinkJpaVendorAdapter.html