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

原文链接：https://www.f2er.com/postgresql/193728.html

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

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