Question

我必须使用MyBatis构建IN条件，其中必须传递基于下面的foreach循环获得的PARENT_VALUES列表....

我试过但无法解决这个问题。我不确定是否

传递的值是：

Map input = new HashMap();
input.put("somedata");
List<String> inConditionList = new ArrayList<String>();
inConditionList.add("P1");
inConditionList.add("P2");
input.put(inConditionList);
sqlSessionTemplate.selectList("getNameAgeDetails", input);

必需的SQL：

 SELECT P.NAME, P.AGE
   FROM PERSON_DETAILS P
   WHERE SOMECOLUMN is NULL AND DATA IN
   (SELECT DATA FROM PARENT_TABLE WHERE PARENT_VALUE IN ("P1, "P2"))
 ORDER BY P.NAME
  FETCH FIRST 10 ROW ONLY

MyBatis Mapper SQL：

<select id="getNameAgeDetails" parameterType="map" resultMap="someResultMap">
    <![CDATA[
        SELECT P.NAME, P.AGE
        FROM PERSON_DETAILS P
        WHERE
         SOMECOLUMN is NULL
        AND DATA IN
          (SELECT DATA
          FROM PARENT_TABLE
          WHERE PARENT_VALUE IN 
         <FOREACH item="item"  index="index" collection="list" separator="," open="(" close=")"> 
                ${item}
            </FOREACH>  
          )
          ORDER BY P.NAME
          FETCH 
            FIRST 10 ROW ONLY 
    ]]>
  </select>

以下是我尝试运行Unit TestCases时遇到的错误：

### The error occurred while setting parameters
### SQL: SELECT P.NAME, P.AGE
            FROM PERSON_DETAILS P
            WHERE
             SOMECOLUMN is NULL
            AND DATA IN
              (SELECT DATA
              FROM PARENT_TABLE
              WHERE PARENT_VALUE IN <FOREACH item="item"  index="index" collection="list" separator="," open="(" close=")">                      ?              </FOREACH>             
### Cause: com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-104, SQLSTATE=42601, SQLERRMC=PARENT_VALUE IN 
            <foreach it;TION
          WHERE;<space>, DRIVER=3.63.75
; bad SQL grammar []; nested exception is com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-104, SQLSTATE=42601, SQLERRMC=PARENT_VALUE IN

Answer 1

您的Select语句需要类似这样的内容

<select id="getNameAgeDetails" parameterType="map" resultMap="someResultMap">
        SELECT P.NAME, P.AGE
        FROM PERSON_DETAILS P
        WHERE
         SOMECOLUMN is NULL
        AND DATA IN
          (SELECT DATA
          FROM PARENT_TABLE
          WHERE PARENT_VALUE IN 
         <FOREACH item="item"  index="index" collection="list" separator="," open="(" close=")"> 
                ${item}
            </FOREACH>  
          )
          ORDER BY P.NAME
          FETCH 
            FIRST 10 ROW ONLY 
  </select>

Answer 2

我同意Karthik Prasad的意见，如果你删除CDATA并且有某种类似的话

a_column>=6 AND b_column<10

您必须执行XML转义，如下所示：

a_column &gt;= 6 AND b_column &lt; 10

IN条件下的MyBatis问题

2 个答案: