Consider code: public class Transaction { ... @OneToMany @Fetch(FetchMode.SUBSELECT) @LazyCollection(LazyCollectionOption.EXTRA) @Where(clause = "entity=4") @JoinColumn(name = "entity_id") private List<Alert> alerts; ... } public class Alert { ... @Any(metaColumn = @Column(name = "entity"), fetch = FetchType.LAZY) @AnyMetaDef( idType = "long", metaType = "integer", metaValues = { @MetaValue(value = "4", targetEntity = Document.class), @MetaValue(value = "9", targetEntity = Transaction.class)}) @JoinColumn(name = "entity_id", insertable = false, updatable = false) private Object relatedObject; ... } produces wrong SQL on size retrieval operation: select count(id) from alerts where entity_id =?