在项目开发的时候，Oracle表中的informCentralManId，informProvinceManId，informCityManId字段类型是 NUMBER，当这几个字段插入NULL的时候，就会报java.sql.SQLSyntaxErrorException: ORA-01790: 表达式必须具有与对应表达式相同的数据类型问题

原因：在mybatis中，字段没有指定类型，当为NULL的时候，可以使当字符串处理了。

处理：在对应的字段上加上 jdbcType=INTEGER

这是报错前的sql：

INSERT INTO T_INFORM_RULE(

id,

foreign_key,

threshold_grade,

alarm_frequency,

inform_way,

inform_central_man_id,

inform_province_man_id,

inform_city_man_id,

business_key,

created_by,

created_time,

updated_by,

updated_time

)

select TIR_ID_SEQ.NEXTVAL,cd.* from(

select

#{item.foreignKey},

#{item.thresholdGrade},

#{item.alarmFrequency},

#{item.informWay},

#{item.informCentralManId},

#{item.informProvinceManId},

#{item.informCityManId},

#{item.businessKey},

#{item.createdBy},

#{item.createdTime},

#{item.updatedBy},

#{item.updatedTime}

from dual

) cd

修复后的sql：

INSERT INTO T_INFORM_RULE(

id,

foreign_key,

threshold_grade,

alarm_frequency,

inform_way,

inform_central_man_id,

inform_province_man_id,

inform_city_man_id,

business_key,

created_by,

created_time,

updated_by,

updated_time

)

select TIR_ID_SEQ.NEXTVAL,cd.* from(

select

#{item.foreignKey},

#{item.thresholdGrade},

#{item.alarmFrequency},

#{item.informWay},

#{item.informCentralManId,jdbcType=INTEGER},

#{item.informProvinceManId,jdbcType=INTEGER},

#{item.informCityManId,jdbcType=INTEGER},

#{item.businessKey},

#{item.createdBy},

#{item.createdTime},

#{item.updatedBy},

#{item.updatedTime}

from dual

) cd