RelationBuilder b1 = new RelationBuilder(db);
RelationBuilder b2 = new RelationBuilder(db);
b1.addProjection(id);
b2.addProjection(id);
b1.addCondition("TABLE.VALUE=1");
b2.addCondition("TABLE.VALUE=2");
CompatibleRelationGroup group = new CompatibleRelationGroup();
Relation r1 = b1.buildRelation();
Relation r2 = b2.buildRelation();
group.addBindingMaker(r1, bm);