Mybatis插入數據行ID生成策略

Oracle：

<insert id="insert" parameterType="vo.Category">

<selectKey resultType="java.lang.Short" order="BEFORE" keyProperty="id">

SELECT SEQ_TEST.NEXTVAL FROM DUAL

</selectKey>

insert into category (id,name_zh, parent_id,

show_order, delete_status, description

)

values (
#{id,jdbcType=NUMBER},

#{nameZh,jdbcType=VARCHAR},

#{parentId,jdbcType=NUMBER},

#{showOrder,jdbcType=NUMBER},

#{deleteStatus,jdbcType=NUMBER},

#{description,jdbcType=VARCHAR}

)

</insert>

MySQL：

針對自增主鍵的表，在插入時不須要主鍵，而是在插入過程自動獲取一個自增的主鍵，好比MySQL，能夠採用以下兩種配置方式：
 

<insert id="insert" parameterType="vo.Category" useGeneratedKeys="true" keyProperty="id">

insert into category (id,name_zh, parent_id,

show_order, delete_status, description

)

values (
#{id,jdbcType=INTEGER},

#{nameZh,jdbcType=VARCHAR},

#{parentId,jdbcType=INTEGER},

#{showOrder,jdbcType=INTEGER},

#{deleteStatus,jdbcType=BIT},

#{description,jdbcType=VARCHAR}

)

</insert>

或
 

<insert id=" insert " parameterType="vo.Category">

<selectKey resultType="java.lang.Short" order="AFTER" keyProperty="id">

SELECT LAST_INSERT_ID() AS id

</selectKey>

insert into category (id,name_zh, parent_id,

show_order, delete_status, description

)

values (
#{id,jdbcType=INTEGER},

#{nameZh,jdbcType=VARCHAR},

#{parentId,jdbcType=INTEGER},

#{showOrder,jdbcType=INTEGER},

#{deleteStatus,jdbcType=BIT},

#{description,jdbcType=VARCHAR}

)

</insert>

UUID：

在Oracle中：

<insert id="insert" parameterType="com.xxx.SystemDepartment">

    <selectKey keyProperty="id" resultType="String" order="BEFORE">

        select sys_guid() from dual

    </selectKey>

    insert into SYSTEM_DEPARTMENT (ID,DEPNAME, SUPERID, SORT, STATE)

    values ( #{id,jdbcType=VARCHAR},#{depname,jdbcType=VARCHAR},

    #{superid,jdbcType=DECIMAL}, #{sort,jdbcType=DECIMAL},

    #{state,jdbcType=DECIMAL})

</insert>

在Mysql中：

<insert id="insert" parameterType="com.xxx.SystemDepartment">

    <selectKey keyProperty="id" resultType="String" order="BEFORE">

        SELECT UUID()

    </selectKey>

    insert into SYSTEM_DEPARTMENT (ID,DEPNAME, SUPERID, SORT, STATE)

    values ( #{id,jdbcType=VARCHAR},#{depname,jdbcType=VARCHAR},

    #{superid,jdbcType=INTEGER}, #{sort,jdbcType=INTEGER},

    #{state,jdbcType=INTEGER})

</insert>

注：UUID如不須要連字符'-'可使用數據庫函數進行處理，如mysql：  select  replace(uuid(),'-','')   UUID  ；