Why @Column annotation ignored when connecting to MySQL via OpenJPA?

Issue

• Follow below steps to replicate the issue.

  • Create JPA project using OpenJPA2 (JPA module of JBoss EAP 6.3.0 GA) as JPA Provider.

  • Use org.hibernate.cfg.ImprovedNamingStrategy as naming strategy to generate and map entities.

  • Specify different property name which should not match to the field name of that particular entity which is mapped with respective table.

  • Following is code snippet to replicate this issue.

    @Column(name="attr_id")
    private Long attrId;

    @Column(name="company_id")
    private String companyId;

    @Column(name="email")
    private String email;

    @Column(name="usr_name")
    private String userName;

    //Below is property type which does not follow org.hibernate.cfg.ImprovedNamingStrategy strategy.
    @Column(name="date_created")
    private Date creationDate;

• Try to access date_created field from above entity and you will face below exception.

Caused by: <openjpa-2.3.0-r422266:1540826 fatal user error> org.apache.openjpa.persistence.ArgumentException: "com.redhat.model.user.creationDate" declares column "date_created", but this column does not exist in table "USER".
    at org.apache.openjpa.jdbc.meta.MappingInfo.mergeColumn(MappingInfo.java:692) [openjpa-2.3.0.jar:2.3.0]
    at org.apache.openjpa.jdbc.meta.MappingInfo.createColumns(MappingInfo.java:593) [openjpa-2.3.0.jar:2.3.0]