我想在 Spring Boot 應用程序中使用休眠從 PostgreSql 數據庫的查詢返回值的 JsonArray 中檢索一個對象。但是我面臨一個異常，“>”是意外標記，盡管我的查詢在 pgAdmin4 查詢工具中運行良好，以下是我的代碼片段。@PersistenceContextprivate EntityManager entityManager;@Transactionalpublic String getItemById(Long id) {    String result = (String) entityManager.createQuery("SELECT JSON_AGG(items)->>0 AS item FROM items WHERE id=:id").setParameter("id", id)            .getResultList().get(0);    System.out.println(result);    return result;}異常如下：org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: > near line 1, column 24 [SELECT JSON_AGG(items)->>0 AS item FROM items WHERE id=:id]; nested exception is java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: > near line 1, column 24 [SELECT JSON_AGG(items)->>0 AS item FROM items WHERE id=:id]    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:367)請幫助實現這一目標或建議我在不更改查詢的情況下解決問題。提前致謝。