更新查询期间的条件生成器错误：BinaryArithmeticOperation 与预期类型不匹配

Question

我正在尝试使用休眠条件生成器执行下一个 SQL：

update account set balance = balance + 500;

这是我的查询建筑代码：

CriteriaBuilder cb = getEntityManager().getCriteriaBuilder();
CriteriaUpdate<JBCAccount> update = cb.createCriteriaUpdate(JBCAccount.class);
Root root = update.from(JBCAccount.class);

update.set("balance", cb.sum(root.get("balance"), amount));

getEntityManager().createQuery(update).executeUpdate();

我也试过了：

CriteriaBuilder cb = getEntityManager().getCriteriaBuilder();
CriteriaUpdate<JBCAccount> update = cb.createCriteriaUpdate(JBCAccount.class);
Root root = update.from(JBCAccount.class);

ParameterExpression<Long> amountExpression = cb.parameter(Long.class);

update.set("balance", cb.sum(root.get("balance"), amountExpression));

getEntityManager().createQuery(update)
    .setParameter(amountExpression, amount).executeUpdate();

两次执行都会产生下一个错误：

org.springframework.dao.InvalidDataAccessApiUsageException: Parameter value [org.hibernate.query.criteria.internal.expression.BinaryArithmeticOperation@53e0be2d] did not match expected type [java.lang.Long (n/a)]; nested exception is java.lang.IllegalArgumentException: Parameter value [org.hibernate.query.criteria.internal.expression.BinaryArithmeticOperation@53e0be2d] did not match expected type [java.lang.Long (n/a)]] with root cause
"java.lang.IllegalArgumentException: Parameter value [org.hibernate.query.criteria.internal.expression.BinaryArithmeticOperation@53e0be2d] did not match expected type [java.lang.Long (n/a)]

MySQL 数据库中的余额类型是：balance bigint UNSIGNED.
amount 代码中的变量类型为 Long.
balance 属性 of JBCAccount 是 Long.

我还尝试用 balance bigint（即没有 UNSIGNED）重新创建一个 MySQL 模式。还是一样的问题。

我错过了什么？

Answer 1

您必须指定路径属性指的是 Long:

update.set((Path<?>) root.<Long>get("balance"), cb.sum(root.<Long>get("balance"), amount));

更新查询期间的条件生成器错误：BinaryArithmeticOperation 与预期类型不匹配

Criteria builder error during update query: BinaryArithmeticOperation did not match expected type

java

hibernate

jpa

criteria-api

spring-data-jpa