java.sql.SQLException：找不到列“ JOB_ID”

Question

I am using Java8 with JPA2/Hibernate5, Spring4 and mySQL.

If anyone can help, I would appreciate it.

I have the following tables.

+--------+          +------------+        +---------+
| job    |          | person_job |        | person  |
+--------+          +------------+        +---------+
|  ID    |          |  JOB_ID    |        |   ID    |
|        |          |  PER_ID    |        |         |
+--------+          +------------+        +---------+

A person can have many jobs .

Job.java

@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "person_job", joinColumns = {
        @JoinColumn(name = "PER_ID", referencedColumnName = "ID") }, inverseJoinColumns = {
                @JoinColumn(name = "JOB_ID", referencedColumnName = "ID", unique = true) })
private Person person;

The following SQL works fine when I run it directly against the database:

select
         e.*, p.*
     from
         www.job as e  
     inner join
         www.person_job as pj 
             on e.id=pj.JOB_ID  
     inner join
         www.person as p 
             on pj.PER_ID=p.ID  
...

When I run a native query (with the above sql), I get the following error:

java.sql.SQLException: Column 'JOB_ID' not found.

In Job.java , if I swap the JOB_ID and PER_ID around in the @JoinTable , then I get:

java.sql.SQLException: Column 'PER_ID' not found.

Because the above SQL runs fine against the database, I think the problem is with join configuration in Job.java .

---

UPDATE

I also have the following that works correctly:

+--------+          +--------------+        +----------+
| job    |          | job_location |        | location |
+--------+          +--------------+        +----------+
|  ID    |          |  JOB_ID      |        |   ID     |
|        |          |  LOC_ID      |        |          |
+--------+          +--------------+        +----------+

A job can have many locations .

jobs.java

@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "job_location", joinColumns = {
        @JoinColumn(name = "JOB_ID", referencedColumnName = "ID") }, inverseJoinColumns = {
                @JoinColumn(name = "LOC_ID", referencedColumnName = "ID", unique = true) })
private Set<Location> locations;

UPDATE

I only get this error when I execute a native query. When I do the following fr example, it works perfectly.

    return (T) entityManager.find(entityClass, id);

Is there something wrong with my native query? (This query works if I don't have the person column on Jobs.java ).

    StringBuilder sb = new StringBuilder();
    sb.append(" select e.* ");
    sb.append(" from ");
    sb.append("    www.job as e ");
    //sb.append(" inner join www.person_job as pj on e.id = pj.JOB_ID ");
    //sb.append(" inner join www.person as p on pj.PER_ID = p.id ");
    sb.append("  where e.id = :id ");
    Query q = entityManager.createNativeQuery(sb.toString(), JobWithDistance.class);
    q.setParameter("id", id);
    List<Job> jobs = (List<Job>) q.getResultList();

Adding the 2 commented out lines makes no difference.

Answer 1

SOLUTION:

I needed to change:

sb.append(" select e.* ");

to

sb.append(" select * ");

Answer 2

Try with this

// in Job entity
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "person_job", joinColumns = { @JoinColumn(name = "JOB_ID") }, 
                                inverseJoinColumns = { @JoinColumn(name = "PER_ID") }
)
private Person person;

...

// in Person entity
@OneToMany(mappedBy = "person")
private List<Job> jobs;