Question

我正在尝试使用Spring Boot（Java）通过MyBatis for IBM DB2执行多个INSERT语句。

以XML

<insert id="insertIntoTempTmpCopyTo" parameterType="map">
   <foreach collection="list" item="lItem" separator=";">
      <foreach collection="data.keyList" item="rec" separator=";">
         <if test = "rec.sel and ((rec.keyType eq 'PPP'.toString())">
            INSERT INTO SESSION.MP_COPYTO(VP_ENCRP_PRC_RL_ID, PROC_CD, VER_KEY_SET_CD, TRNSLT_TP_CD, SET_INDEX_NUM, SET_MDK_DKI_NUM, PACKET_NUM)
            SELECT      
                '${lItem.EncrpRlId}' as ENCRP_RL_ID,
                '${rec.systemTo}' as PROC_CD,
                '${rec.keyType}' as KEY_SET_CD,
                '${rec.trnsltTpCd}' as TRNSLT_CD,
                '${rec.setTo}' as SET_INDEX,
                '${rec.dkiTo}' AS SET_NUM,

                <if test="lItem.packetNum != null">
                    ${lItem.packetNum} AS P_NUM
                </if>
                <if test="lItem.packetNum == null">
                    0 AS P_NUM
                </if>
            FROM SYSIBM.SYSDUMMY1
        </if>
    </foreach>
  </foreach>
  ;
</insert>

使用此功能，我可以创建多个插入语句

 INSERT INTO SESSION.MP_COPYTO(ENCRP_RL_ID, PROC_CD, KEY_SET_CD, TRNSLT_CD, SET_INDEX, SET_NUM, P_NUM) 
 SELECT '500137' as ENCRP_RL_ID, 'DB' as PROC_CD, 'MDK' as KEY_SET_CD, '0' as TRNSLT_CD, '1' as SET_INDEX, '001' AS SET_NUM, 766456 AS P_NUM FROM SYSIBM.SYSDUMMY1 ; 

 INSERT INTO SESSION.MP_COPYTO(ENCRP_RL_ID, PROC_CD, KEY_SET_CD, TRNSLT_CD, SET_INDEX, SET_NUM, P_NUM) 
 SELECT '500137' as ENCRP_RL_ID, 'DB' as PROC_CD, 'MDK' as KEY_SET_CD, '0' as TRNSLT_CD, '2' as SET_INDEX, '002' AS SET_NUM, 766456 AS P_NUM FROM SYSIBM.SYSDUMMY1 ;

但是当我通过Spring Boot JAVA执行时，我只能插入一行

2019-05-24 09:36:51,094 DEBUG [SimpleAsyncTaskExecutor-1] : Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@123536e]
2019-05-24 09:36:51,094 DEBUG [SimpleAsyncTaskExecutor-1] : Fetched SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@123536e] from current transaction
2019-05-24 09:36:51,118 DEBUG [SimpleAsyncTaskExecutor-1] : ==>  Preparing: INSERT INTO SESSION.MP_COPYTO(ENCRP_RL_ID, PROC_CD, KEY_SET_CD, TRNSLT_CD, SET_INDEX, SET_NUM, P_NUM) SELECT '500137' as ENCRP_RL_ID, 'DB' as PROC_CD, 'MDK' as KEY_SET_CD, '0' as TRNSLT_CD, '1' as SET_INDEX, '001' AS SET_NUM, 766456 AS P_NUM FROM SYSIBM.SYSDUMMY1 ; INSERT INTO SESSION.MP_COPYTO(ENCRP_RL_ID, PROC_CD, KEY_SET_CD, TRNSLT_CD, SET_INDEX, SET_NUM, P_NUM) SELECT '500137' as ENCRP_RL_ID, 'DB' as PROC_CD, 'MDK' as KEY_SET_CD, '0' as TRNSLT_CD, '2' as SET_INDEX, '002' AS SET_NUM, 766456 AS P_NUM FROM SYSIBM.SYSDUMMY1 ;
2019-05-24 09:36:51,118 DEBUG [SimpleAsyncTaskExecutor-1] : ==> Parameters: 
2019-05-24 09:36:51,158 DEBUG [SimpleAsyncTaskExecutor-1] : <==    Updates: 1

我很困惑为什么会这样。我正在寻找一个将allowMultipleQueries属性设置为true的地方，但找不到。我有什么办法可以在运行时设置它。

那是我能做的事。

任何输入都会有所帮助。

谢谢！

Answer 1

您没有指定版本，但是Db2可能支持多行插入语法。
不过，根据this thread，似乎有些变化。

我刚刚使用Db2 LUW 11测试了以下语法，并且可以正常工作。

INSERT INTO table (col1, col2) VALUES (?, ?), (?, ?)

使用此语法，该语句可以编写如下：

<insert id="insertIntoTempTmpCopyTo" parameterType="map">
  INSERT INTO SESSION.MP_COPYTO(VP_ENCRP_PRC_RL_ID,
    PROC_CD, VER_KEY_SET_CD, TRNSLT_TP_CD,
    SET_INDEX_NUM, SET_MDK_DKI_NUM, PACKET_NUM) VALUES
  <trim suffixOverrides=",">
    <foreach collection="list" item="lItem">
      <foreach collection="data.keyList" item="rec">
        <if test="rec.sel and (rec.keyType eq 'PPP'.toString())">
          (#{lItem.EncrpRlId}, #{rec.systemTo}, #{rec.keyType},
            #{rec.trnsltTpCd}, #{rec.setTo}, #{rec.dkiTo},
          <if test="lItem.packetNum != null">
            #{lItem.packetNum}
          </if>
          <if test="lItem.packetNum == null">
            0
          </if>
          ),
        </if>
      </foreach>
    </foreach>
  </trim>
</insert>

<trim />元素删除了多余的逗号。
您应尽可能使用#{}而不是${}。请参阅FAQ。

Answer 2

我对IBM DB2不熟悉，但是您可以将mapper.xml更改为类似的内容

<insert id="insertIntoTempTmpCopyTo" parameterType="map">
    INSERT ALL  
    <foreach collection="list" item="element" index="index" >
        <foreach collection="data.keyList" item="rec">
            INTO SESSION.MP_COPYTO(VP_ENCRP_PRC_RL_ID, PROC_CD, VER_KEY_SET_CD, TRNSLT_TP_CD, SET_INDEX_NUM, SET_MDK_DKI_NUM, PACKET_NUM)
            VALUES
            (
                #{lItem.EncrpRlId},
                #{rec.systemTo},
                #{rec.keyType},
                #{rec.trnsltTpCd},
                #{rec.setTo},
                #{rec.dkiTo},
                <choose>
                    <when test="lItem.packetNum != null">
                        #{lItem.packetNum}
                    </when>
                    <otherwise>
                        0
                    </otherwise>
                </choose>
            )
        </foreach>
    </foreach>
    SELECT * FROM dual
    </insert>
</mapper>

最后的SELECT * FROM dual非常重要

或者您将mapper.xml更改为

<insert id="insertIntoTempTmpCopyTo" parameterType="map">
    -- Change the delimiter from ';' to '§'
    -- @DELIMITER §

    -- removed separator=";"
    <foreach collection="list" item="lItem">

        -- removed separator=";"
        <foreach collection="data.keyList" item="rec">
            <if test = "rec.sel and ((rec.keyType eq 'PPP'.toString())">
                INSERT INTO SESSION.MP_COPYTO(VP_ENCRP_PRC_RL_ID, PROC_CD, VER_KEY_SET_CD, TRNSLT_TP_CD, SET_INDEX_NUM, SET_MDK_DKI_NUM, PACKET_NUM)
                SELECT      
                  #{lItem.EncrpRlId} AS ENCRP_RL_ID,
                  #{rec.systemTo}    AS PROC_CD,
                  #{rec.keyType}     AS KEY_SET_CD,
                  #{rec.trnsltTpCd}  AS TRNSLT_CD,
                  #{rec.setTo}       AS SET_INDEX,
                  #{rec.dkiTo}       AS SET_NUM,

                  <choose>
                      <when test="lItem.packetNum != null">
                          #{lItem.packetNum} AS P_NUM
                      </when>
                      <otherwise>
                          0  AS P_NUM
                      </otherwise>
                  </choose>
                  FROM SYSIBM.SYSDUMMY1

                  -- separator inserted
                  ;
            </if>
        </foreach>
    </foreach>
    -- Change the delimiter back to ';'
    -- @DELIMITER ;
</insert>

通过将mybatis-delimiter从;更改为其他内容，该内容不会出现在您的语句中，就像§一样，您可以执行以分号分隔的sql脚本

在MyBatis中为IBM DB2执行多个INSERT语句

2 个答案: