oracle批量插入，自增主键出现的问题。

两种oracle批量插入的实例。

oracle自增主键批量插入会出现错误。不使用自增主键是不会报错的。

Java 程序 调用批量插入的方法：

List<CategoryExpertGrade> categoryExpertGrades=new ArrayList<CategoryExpertGrade>();
CategoryExpertGrade c1=new CategoryExpertGrade();
CategoryExpertGrade c2=new CategoryExpertGrade();
c1.setGrade("C");
c2.setGrade("D");
c1.setExpertFk(124L);
c2.setExpertFk(124L);
c1.setCategoryFk(4171L);
c2.setCategoryFk(4172L);
categoryExpertGrades.add(c1);
categoryExpertGrades.add(c2);
int i=categoryExpertGradeMapper.insertList(categoryExpertGrades);

第一种：

mybatis  sql语句：

<insert id="insertList"  >
insert    into CATEGORY_EXPERT_GRADE (PK, CATEGORY_FK, EXPERT_FK,
GRADE, SAVE_DATE, FLAG,
EXTEND1, EXTEND2, EXTEND3
)
<foreach collection="recordList"  item="i"  close=" " open=" " separator=" union all ">
select  Sequence_Shzj.nextval ,
'${i.categoryFk}' , '${i.expertFk}' ,
'${i.grade}' , '${i.saveDate}' , '${i.flag}' ,
'${i.extend1}' , '${i.extend2}' , '${i.extend3}'  from dual
</foreach>
</insert>

出错结果：

### SQL: insert into CATEGORY_EXPERT_GRADE (PK, CATEGORY_FK, EXPERT_FK, GRADE, SAVE_DATE, FLAG, EXTEND1, EXTEND2, EXTEND3 )
select Sequence_Shzj.nextval , '4171' , '124' , 'C' , '' , '' , '' , '' , '' from dual
union all
select Sequence_Shzj.nextval , '4172' , '124' , 'D' , '' , '' , '' , '' , '' from dual
e: java.sql.SQLException: ORA-02287: 此处不允许序号

第二种：

mybatis sql语句

<insert id="insertList"  >
insert ALL
<foreach collection="recordList"  item="i"  close=" " open=" " separator=" ">
into CATEGORY_EXPERT_GRADE (PK, CATEGORY_FK, EXPERT_FK,
GRADE, SAVE_DATE, FLAG,
EXTEND1, EXTEND2, EXTEND3
)
values (Sequence_Shzj.nextval, #{i.categoryFk,jdbcType=DECIMAL}, #{i.expertFk,jdbcType=DECIMAL},
#{i.grade,jdbcType=VARCHAR}, #{i.saveDate,jdbcType=DATE}, #{i.flag,jdbcType=DECIMAL},
#{i.extend1,jdbcType=VARCHAR}, #{i.extend2,jdbcType=VARCHAR}, #{i.extend3,jdbcType=VARCHAR}
)
</foreach>
SELECT 1 FROM DUAL
</insert>

错误结果：

### SQL: insert ALL
into CATEGORY_EXPERT_GRADE (PK, CATEGORY_FK, EXPERT_FK, GRADE, SAVE_DATE, FLAG, EXTEND1, EXTEND2, EXTEND3 ) values (Sequence_Shzj.nextval, ?, ?, ?, ?, ?, ?, ?, ? )
into CATEGORY_EXPERT_GRADE (PK, CATEGORY_FK, EXPERT_FK, GRADE, SAVE_DATE, FLAG, EXTEND1, EXTEND2, EXTEND3 ) values (Sequence_Shzj.nextval, ?, ?, ?, ?, ?, ?, ?, ? )
SELECT 1 FROM DUAL
### Cause: java.sql.SQLException: ORA-00001: 违反唯一约束条件 (XIAOMI.PK_CATEGORY_EXPERT_GRADE), PK 的值是相同的。

上面的两种批量插入的方式都不能使用序列。

解决办法：

写一个函数包装一下序列：

create or replace function
4000
get_seq return number is
Result number;
begin
select Sequence_Shzj.nextval into Result from dual;
return(Result);
end get_seq;

sql语句中的Sequence_Shzj.nextval都替换成get_seq;