Cause: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "

插入数据postgre 报错如下

`01`	`### Error updating database. Cause: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint` `"vehicle__appKey_pkey"`

`02`	`### The error may involve com.sq.platform.basePlatform.dao.VehicleMapper.insertVehicleAppkey-Inline`

`03`	`### The error occurred` `while` `setting parameters`

`04`	`### SQL: insert into vehicle__appkey(vehicle_id_fk, appkey_id_fk) values (?, ?)`

`05`	`### Cause: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint` `"vehicle__appKey_pkey"`

`06`	`; SQL []; ERROR: duplicate key value violates unique constraint` `"vehicle__appKey_pkey"; nested exception is org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint` `"vehicle__appKey_pkey"`

`07`	`at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:239)`

`08`	`at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)`

`09`	`at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:74)`

`10`	`at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:399)`

`11`	`at com.sun.proxy.$Proxy11.insert(Unknown Source)`

表中 vehicle__appkey id字段如下

 
       1 
       id integer NOT NULL DEFAULT nextval('"vehicle__appKey_id_seq"'::regclass),

1

 
       1 
       vehicle__appKey_pkey 序列表如下

 
       1 
       <span style="font-family: Arial, Helvetica, sans-serif;">-- Sequence: "vehicle__appKey_id_seq"</span>

 
       01 
       <pre name="code" class="java"> 
      
       02 
       -- DROP SEQUENCE "vehicle__appKey_id_seq"; 
      
       03 
         
       04 
       CREATE SEQUENCE "vehicle__appKey_id_seq" 
      
       05 
         INCREMENT  1 
      
       06 
         MINVALUE  1 
      
       07 
         MAXVALUE  9223372036854775807 
      
       08 
         <span style="color:#ff0000;">START 711</span> 
      
       09 
         CACHE  1; 
      
       10 
       ALTER TABLE "vehicle__appKey_id_seq" 
      
       11 
         OWNER TO postgres;

不难看出以上错误是由于 vehicle__appkey中id字段重复导致的，而id字段的值来自于 vehicle__appKey_pkey 序列表， START 711 标示下一个id值为712，而712的id vehicle__appkey表中已经存在了，所以插入数据时报以上这个错误

解决方法：将"vehicle__appKey_id_seq"中的当前值设为为vehicle__appkey id的最大值

Cause: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "

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