Hibernate Annotation Formula NullPointer Exception or invalid identifier errors

Question

I was trying to use @Formula in one of my entity classes. What I need to do is select a boolean from another entity.

I tried to put the property definition but it keeps throwing a NullPointerException when publishing, I did it as follows

@JoinColumn(name = "SOIR08_FECHA_CARGA", referencedColumnName = "SOIR15_CODI_FECHA", nullable = true)
@ManyToOne(fetch = FetchType.EAGER)
private FechaCarga loadDate;

@JoinColumn(name = "SOIR08_RECEPTOR", referencedColumnName = "SOIR05_CON_DISTRITO_TELEFONICO", nullable = true)
@ManyToOne(optional = true, fetch = FetchType.EAGER)
private DistrictPhone receiver;

@Formula("(select io.done from Table io where io.district = receiver and io.loadDate = loadDate)")
private Boolean isDone;

Then I tried putting the @Formula annotation in the getter

@Formula("(select io.done from Table io where io.district = receiver and io.loadDate = loadDate))")
public Boolean getIsDone() {
    return isDone;
}

but when I access the page where the property must be shown I get ORA-00904: "APROB0_"."ISDONE": invalid identifier

Any idea,suggestion or workaround will be highly appreciated.

Answer 1

I couldn't find a way to use this annotation without getting errors. What I decided to do was to add a column in the table, and fill it when a insert was made, not the best way but I needed to do it fast and there was nothing on forums that worked for me. Thanks.

Answer 2

You have to write pure SQL in the @Formula (but not HQL).