mybatis choose

MyBatis `choose` element is used in XML mapping files to perform conditional branching. It allows you to specify multiple conditions and their corresponding SQL statements. The `choose` element works similar to the `switch` statement in programming languages.

Here's an example usage of the `choose` element in MyBatis:

<select id="getUsers" resultType="User">
  SELECT * FROM users
  <where>
    <choose>
      <when test="status == 'active'">
        AND status = 'active'
      </when>
      <when test="status == 'inactive'">
        AND status = 'inactive'
      </when>
      <otherwise>
        AND status IS NULL
      </otherwise>
    </choose>
  </where>
</select>

In this example, the SQL query will include different conditions based on the value of the `status` parameter. If the `status` parameter is "active", it will add the condition `AND status = 'active'`. If the `status` parameter is "inactive", it will add the condition `AND status = 'inactive'`. Otherwise, it will add the condition `AND status IS NULL`.

The `choose` element is useful when you need to dynamically generate SQL statements based on certain conditions.