如何在HQL中转义关键字“ on”

Question

Here is my Entity which I want to query with Hibernate 4.3.4:

@Entity
@DynamicInsert
@DynamicUpdate
public class Device extends OrmEntity implements Serializable {

    @Column(name = "is_on") // was necessary to get Hibernate to create the table at all
    private boolean on;

    ...
}

This is the HQL I want to execute (btw the database is PostgreSQL ):

Query query = session.createQuery("from Device where ... and on = :a");
query.setBoolean("a", true);

This gives me org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: on near line 1 .

I tried many escape characters like backticks, \\", [ ], single-quotes, without success.

What would be the appropriate way to escape the keyword "on" in this HQL-query?

Edit:

I tried "from Device d where d.on = :a" which results in QuerySyntaxException: unexpected token: d near line 1 .

I did not try renameAlias as this seems to be overkill for just escaping a keyword...

Edit2:

I am trying out AliasToMapTransformer but I can not seem to get it working for a where clause ... ? It seems to be made for column aliases.

Edit3:

Generally, this code is around for some time already and strangely it worked with Hibernate < 4.3.$

Edit4:

I accepted NimChimpsky's answer, and implemented the following change: Rename the boolean member from on to isOn , but keep the getter and setter as they were: setOn() and isOn() .

No further change in my code necessary, and Hibernate is happy now.

Answer 1

@Column
private boolean deviceIsOn;

annotate the field with a renamed variable, and then my method would be isOn .

Bit hacky ... but you keep your nice friendly OO api, with out too much hassle.

Or even simpler, just call it off which isn't reserved