Question

我正在使用HQL进行搜索查询，一切正常，直到我找到LIKE子句。无论我做什么，似乎都没有正确执行LIKE子句。这是我的询问。

String QUERY = "FROM Person as p WHERE p.createUser = : createUser 
     AND p.personId in (SELECT pn.personId FROM PersonName pn WHERE pn.personNameType = 'FIRST' AND pn.name LIKE '%:firstName%')";

(List<Person>)session.createQuery(QUERY).setString("createUser", createUser).setString("firstName", firstName).list();

Answer 1

字符串文字内的参数未解析。

您需要将% s添加到带字符串连接的参数值 - 在程序端

String QUERY = "FROM Person as p WHERE p.createUser = : createUser 
     AND p.personId in " +
     "(SELECT pn.personId FROM PersonName pn " + 
     "WHERE pn.personNameType = 'FIRST' " + 
     "AND pn.name LIKE :firstName)";

(List<Person>)session.createQuery(QUERY)
    .setString("createUser", createUser)
    .setString("firstName", "%" + firstName + "%").list();

或在数据库方面：

String QUERY = "FROM Person as p WHERE p.createUser = : createUser 
     AND p.personId in " +
     "(SELECT pn.personId FROM PersonName pn " + 
     "WHERE pn.personNameType = 'FIRST' " + 
     "AND pn.name LIKE CONCAT('%', :firstName, '%'))";

(List<Person>)session.createQuery(QUERY)
    .setString("createUser", createUser)
    .setString("firstName", firstName).list();

Answer 2

我们可以使用多个concat解决此问题。

SELECT pn.personId FROM PersonName pn WHERE pn.personNameType = 'FIRST' AND pn.name LIKE concat(concat('%", firstName), '%')

LIKE的HQL查询有问题

2 个答案: