Mybatis插入数据行ID生成策略

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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：

针对自增主键的表，在插入时不需要主键，而是在插入过程自动获取一个自增的主键，比如MySQL，可以采用如下两种配置方式：

<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如不需要连字符'-'可以使用数据库函数进行处理，如mysql： select replace(uuid(),'-','') UUID ；

来源：oschina

链接：https://my.oschina.net/u/592236/blog/692232

标签

MyBatis

uuid