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12

Null enums and IS (NOT) NULL: NullPointerException

; @Enumerated(EnumType.STRING) private ExampleEnum exampleEnum; public int getId
12

possible index required for improving query performance

; @Enumerated(EnumType.STRING) private RelationshipType relationshipType
2

Enum fields are set to null and embeddable enum class does not show in explorer

= FetchType.EAGER) @Enumerated(EnumType.STRING) private List<package.of.Role> roles = null; itsme Martin

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Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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