How to define index by several columns in hibernate entity?
- by foobar
Morning.
I need to add indexing in hibernate entity. As I know it is possible to do using @Index annotation to specify index for separate column but I need an index for several fields of entity.
I've googled and found jboss annotation @Table, that allows to do this (by specification). But (I don't know why) this functionality doesn't work. May be jboss version is lower than necessary, or maybe I don't understant how to use this annotation, but... complex index is not created.
Why index may not be created?
jboss version 4.2.3.GA
Entity example:
package somepackage;
import org.hibernate.annotations.Index;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
@org.hibernate.annotations.Table(appliesTo = House.TABLE_NAME,
indexes = {
@Index(name = "IDX_XDN_DFN",
columnNames = {House.XDN, House.DFN}
)
}
)
public class House {
public final static String TABLE_NAME = "house";
public final static String XDN = "xdn";
public final static String DFN = "dfn";
@Id
@GeneratedValue
private long Id;
@Column(name = XDN)
private long xdn;
@Column(name = DFN)
private long dfn;
@Column
private String address;
public long getId() {
return Id;
}
public void setId(long id) {
this.Id = id;
}
public long getXdn() {
return xdn;
}
public void setXdn(long xdn) {
this.xdn = xdn;
}
public long getDfn() {
return dfn;
}
public void setDfn(long dfn) {
this.dfn = dfn;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
When jboss/hibernate tries to create table "house" it throws following exception:
Reason: org.hibernate.AnnotationException: @org.hibernate.annotations.Table references an unknown table: house
