Question

这是我的疑问。

List exp = entityManager.getEntityManager()
        .createQuery("select sum(u.expenseAmount), u.wdExpenseGroup.expenseGroupName from WdExpense u WHERE MONTH(CAST(u.expenseDate as date)) = MONTH(NOW()) AND YEAR(CAST(u.expenseDate as date)) = YEAR(NOW()) group by u.wdExpenseGroup.expenseGroupId")
        .getResultList();

我遇到了错误。

java.lang.IllegalArgumentException：发生异常时在EntityManager中创建查询：异常描述：语法解析查询时出错[select sum（u.expenseAmount），来自WdExpense的u.wdExpenseGroup.expenseGroupName你好 MONTH（CAST（u.expenseDate as date））= MONTH（NOW（））AND YEAR（CAST（u.expenseDate as date））= YEAR（NOW（））group by u.wdExpenseGroup.expenseGroupId]，第1行，第91列：意外令牌 [（]。内部异常：NoViableAltException（83！= [661：1： simpleConditionalExpressionRemainder [Object left]返回[Object node] :( n = comparisonExpression [left] |（n1 = NOT）？n = conditionWithNotExpression [（n1！= null），left] | IS（n2 = NOT）？ N = isExpression [（n2！= null），left]）;]）

我该如何解决这个问题？

Answer 1

MONTH，YEAR等不是有效的JPQL。见http://www.datanucleus.org/products/accessplatform_4_0/jpa/jpql.html#JPQL_BNF_Notation

在EntityManager中创建查询时发生异常

1 个答案: