@Entity
class A {

   private int relevance;
   private int field1;

   public int getField1() {
      return field1;
   }

   public void setField1(int field1) {
      this.field1 = field1;
   }

   @Formula("MY_PACKAGE.RELEVANCE_FUNCTION(field1,:variable)")
   public int getRelevance() {
      return relevance;
   }

   public void setRelevance(int relevance) {
      this.relevance = relevance;
   }

}