iBatis中使用动态查询

最新推荐文章于 2016-05-09 17:21:57 发布

转载最新推荐文章于 2016-05-09 17:21:57 发布 · 569 阅读

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#ibatis #date #email #branch #user

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本文通过一个具体的MyBatis动态SQL示例，详细介绍了如何使用MyBatis进行复杂查询与更新操作。示例中包括了条件查询、动态字段设置等功能，展示了MyBatis在处理数据库操作时的强大灵活性。

<select id="selectDispatchedKey" parameterClass="KeyAndKeyFlowInfo" resultMap="KeyAndKeyFlowResult">
   select distinct
    KEY_ID,
    USER_ID,
    INITIATOR,
    INIT_DATE,
    INITIATOR_EMAIL,
    SGS_KEY.BRANCH_NAME,
    APPROVER,
    APPROVER_EMAIL,
    APPROVE_DATE
   from
    SGS_KEY,
    SGS_KEY_FLOW
   where SGS_KEY.APPLY_FLOW_ID=SGS_KEY_FLOW.KEY_FLOW_ID
   <dynamic prepend="and" open="(" close=")">
    <isNotNull property="ki.userId" prepend="and" removeFirstPrepend="false">
     USER_ID = #ki.userId#
    </isNotNull>
    <isNotNull property="kfi.initiator" prepend="and">
     INITIATOR = #kfi.initiator#
    </isNotNull>
    <isNotNull property="kfi.initDate" prepend="and">
     INIT_DATE = #kfi.initDate#
    </isNotNull>
   </dynamic>
</select>

<update id="updateKeyFlow" parameterClass="KeyFlowInfo">
   update SGS_KEY_FLOW set
   <dynamic>
     KEY_FLOW_ID =#keyFlowId#
    <isNotNull property="branchName" prepend=",">
     BRANCH_NAME = #branchName#
    </isNotNull>
    <isNotEqual property="operation" prepend="," compareProperty="operation" compareValue="0">
     OPERATION = #operation#
    </isNotEqual>
    <isNotNull property="initiator" prepend=",">
     INITIATOR = #initiator#
    </isNotNull>
    <isNotNull property="initiatorEmail" prepend=",">
     INITIATOR_EMAIL = #initiatorEmail#
    </isNotNull>
    <isNotNull property="initDate" prepend=",">
     INIT_DATE = #initDate#
    </isNotNull>
    <isNotNull property="approver" prepend=",">
     APPROVER = #approver#
    </isNotNull>
    <isNotNull property="approverEmail" prepend=",">
     APPROVER_EMAIL = #approverEmail#
    </isNotNull>
    <isNotNull property="approveDate" prepend=",">
     APPROVE_DATE = #approveDate#
    </isNotNull>
    <isNotEqual property="keyNum" prepend="," compareProperty="keyNum" compareValue="0">
     KEY_NUM = #keyNum#
    </isNotEqual>
    <isNotNull property="applyReason" prepend=",">
     APPLY_REASON = #applyReason#
    </isNotNull>
    <isNotNull property="rejectReason" prepend=",">
     REJECT_REASON = #rejectReason#
    </isNotNull>
   </dynamic>
   where
    KEY_FLOW_ID =#keyFlowId#
</update>