SQLMap - Fetching ArrayList within an HashMap result

[srividhya umashanker]

I have the following XML entry   <resultMap id="result-tree1" class="java.util.HashMap">      <result property="id" column="tree_id"/>      <result property="screenName" column="screen_name" />      <result property="Name" column="name" />   <result property="column_id" column="tree_id"  select="getColumnDetails" />   </resultMap>      <!-- Fetches the values based on the mapping -->   <select id="getTree2" resultMap="result-tree1" parameterClass="java.util.Map" >     SELECT *       FROM tree       WHERE tree.tree_id = #id#<!-- when parameterMap is used ? has to be used -->   </select>      <select id="getColumnDetails" resultClass="java.util.ArrayList" parameterClass="int">     SELECT column_id       FROM column_details       WHERE tree_id = #value#   </select> Where the resultMap has one entry which is an arrayList.       The java method call is Map param = new HashMap(); param.put("id",new Integer(90));   Map tree = (HashMap) sqlMap.queryForObject("getTree2",param);       But it throws executeQueryForObject() returns too many rows Exception..     How to go about it??