IBATIS 总结

以下两段代码等价：

段落1

<insert id="addPaBonusInputItemInfo" parameterClass="linkMap">

        <![CDATA[

            INSERT INTO BN_PARAM_ITEM

                (

                    PARAM_ITEM_NO,

                    PARAM_ITEM_ID,

                    DATA_TYPE,

                    CREATE_DATE,

                  CREATED_BY,

                    ACTIVITY,

                    DESCR

                )

            VALUES(

                    #NO:VARCHAR#,

                    #ITEM_ID:VARCHAR#,

                    #DATA_TYPE:VARCHAR#,

                    SYSDATE,

                  #CREATED_BY:VARCAHR#,

                    1,

                    #DESCR:VARCHAR#

                )

        ]]>

    </insert>

段落2 

<insert id="addPaBonusInputItemInfo" parameterClass="linkMap">

    INSERT INTO BN_PARAM_ITEM

  <![CDATA[

     (

    ]]>

    <dynamic prepend=" ">

    <isNotEmpty  prepend=",">PARAM_ITEM_NO</isNotEmpty>

    <isNotEmpty  prepend=",">PARAM_ITEM_ID</isNotEmpty>

    <isNotEmpty   prepend=",">DATA_TYPE</isNotEmpty>

    <isNotEmpty  prepend=",">CREATE_DATE</isNotEmpty>

    <isNotEmpty property="CREATED_BY" prepend=",">CREATED_BY</isNotEmpty>

    <isNotEmpty   prepend=",">ACTIVITY</isNotEmpty>

    <isNotEmpty  prepend=",">DESCR</isNotEmpty> 

    </dynamic>

    <![CDATA[

    ) VALUES (

    ]]>

    <dynamic prepend=" "> 

    <isNotEmpty property="NO" prepend=",">#NO#</isNotEmpty>

    <isNotEmpty property="ITEM_ID" prepend=",">#ITEM_ID#</isNotEmpty>

    <isNotEmpty property="DATA_TYPE" prepend=",">#DATA_TYPE#</isNotEmpty>

    <![CDATA[

      ,  SYSDATE,

    ]]>

  <isNotEmpty property="CREATED_BY" prepend=",">#CREATED_BY#</isNotEmpty>

    </dynamic>

    <![CDATA[

       1 

    ]]>

    <isNotEmpty property="DESCR" prepend=",">#DESCR#</isNotEmpty> 

    <![CDATA[

      )

    ]]>

    </insert>

 两者差异

如果输入参数：CREATED_BY 为NULL

第一段代码会报错

第二段则不会

 

SQL

INSERT INTO BN_PARAM_ITEM
  (PARAM_ITEM_NO, PARAM_ITEM_ID, DATA_TYPE, CREATE_DATE, ACTIVITY, DESCR)
VALUES
  (?, ?, ?, SYSDATE, 1, ?)
-- [124363, 2, NUMBER(14,4), 6]