1.通过Oracle序列

1. -- Create sequence
2. create sequence SEQ_DW_EWSYSTEM
3. minvalue 1
4. maxvalue 999999999999999999999999999
5. start with 1
6. increment by 1
7. cache 20;

1. <insert id="insertEwsystem" parameterType="Ewsystem">
2. <selectKey keyProperty="id" resultType="long" order="BEFORE">
3. SELECT SEQ_EWSYSTEM.NEXTVAL FROM DUAL <!-- SELECT DECODE(MAX(ID),NULL,0,MAX(ID))+1 FROM EWSYSTEM -->
4. </selectKey>
5. INSERT INTO EWSYSTEM (ID,ORG_ID,NAME)VALUES(#{id},#{orgId,jdbcType=VARCHAR},#{name,jdbcType=VARCHAR})
6. </insert>

2.通过Oracle触发器

1. create or replace trigger TRG_DW_EWSYSTEM
2. before insert
3. on DW_EWSYSTEM  for each row
4. begin
5. select SEQ_DW_EWSYSTEM.nextval into :new.id from dual;
6. end;

1. <insert id="insertEwsystem" parameterType="Ewsystem">
2. <selectKey resultType="int" keyProperty="id" order="AFTER">
3. SELECT SEQ_DW_EWSYSTEM.CURRVAL FROM DUAL
4. </selectKey>
5. INSERT INTO EWSYSTEM (ID,ORG_ID,NAME)VALUES(#{id},#{orgId,jdbcType=VARCHAR},#{name,jdbcType=VARCHAR})
6. </insert>