mybatis插入时，当插入clob类型时报错，ORA-01461:仅能绑定要插入LONG列的LONG值。
mapper文件SQL如下

<insert id="addDutyPost" parameterType="dp">
    insert into sds_duty_post(id,title,content,creator,create_date)
    select SEQ_SDS_DUTY_POST.NEXTVAL,#{title,jdbcType=VARCHAR},#{content,jdbcType=CLOB},#{creator,jdbcType=VARCHAR},sysdate
    from dual where not exists(select 'x' from sds_duty_post where title=#{title})
</insert>

这个SQL在长度<4000时，工作正常；大于4000，会提示ORA-01461.
修改SQL

<select id="selPostByTitle" parameterType="string" resultType="dp">
    select id as postid,title,content,creator,create_date,updator,update_date from sds_duty_post where title=#{value}
</select>
<insert id="addDutyPost" parameterType="dp">
    insert into sds_duty_post(id,title,content,creator,create_date)
    values (SEQ_SDS_DUTY_POST.NEXTVAL,#{title,jdbcType=VARCHAR},#{content,jdbcType=CLOB},#{creator,jdbcType=VARCHAR},sysdate)
</insert>

或者

<select id="selPostByTitle" parameterType="string" resultType="dp">
    select id as postid,title,content,creator,create_date,updator,update_date from sds_duty_post where title=#{value}
</select>
<insert id="addDutyPost" parameterType="dp">
declare
	cntnt clob:=#content#
	begin
    insert into sds_duty_post(id,title,content,creator,create_date)
    values (SEQ_SDS_DUTY_POST.NEXTVAL,#{title},cntnt,#{creator},sysdate);
    end;
</insert>