mybatis子查询传参数
时间: 2023-08-18 20:09:42 浏览: 199
在 MyBatis 中,可以使用动态 SQL 来传递参数给子查询。以下是一个示例:
首先,定义一个参数对象,用于传递给子查询:
public class MyParam {
private int id;
// getter and setter
}
然后,在 MyBatis 的映射文件中,使用动态 SQL 语句来传递参数给子查询:
<select id="getParents" resultMap="parentResultMap">
SELECT * FROM parents WHERE id IN
<foreach collection="subQueryList" item="subQuery" open="(" close=")" separator=",">
SELECT parent_id FROM child WHERE id = #{subQuery.id}
</foreach>
</select>
在这个例子中,subQueryList
是一个包含多个 MyParam
对象的集合。每个 MyParam
对象都有一个 id
属性,表示子查询中的参数。
在这个例子中,我们使用了 foreach
元素来遍历 subQueryList
集合,并将每个 MyParam
对象的 id
属性传递给子查询中的参数 #{subQuery.id}
。
请注意,这只是一个示例。实际使用时,你需要根据你的数据模型和需求来调整 SQL 查询语句和参数对象的定义。
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