如何解决错误：重复的键值违反了唯一约束“ xak1fact_dim_relationship”
| 在删除某些行并根据来自Java的条件更新表时，出现以下错误。我的数据库是PostgreSQL 8.4。下面是错误： 错误：重复的键值违反唯一 约束\“ xak1fact_dim_relationship \” 导致此问题的代码如下：/**
* Commits job. This does the following:
* <OL>
* <LI> cancel previous datamart states </LI>
* <LI> drop diabled derived objects </LI>
* <LI> flip mirror relationships for objects with next states </LI>
* <LI> advance rolloff_state from start1 to complete1,from start2 to complete </LI>
* <LI> set 1/0 internal states to 0/-1 </LI>
* <LI> remove header objects with no letter rows </LI>
* <LI> mark mirror rel as OS if children are missing (e.g.,semantic w/o agg build) </LI>
* <LI> mark mirror rel as OS if int-map not in sync with dim base (e.g.,int-map SQL w/o semantic) </LI>
* </OL>
*/
protected void CommitJobUnprotected()
throws SQLException
{
if (_repl.epiCenterCon== null)
throw makeReplacementError(0);
boolean oldAutoCommitStatus = _repl.epiCenterCon.getAutoCommit();
try
{
_repl.epiCenterCon.setAutoCommit(false);
Statement stmt = null;
boolean committed = false;
synchronized (SqlRepl.metaChangeLock)
{
try
{
stmt = _repl.epiCenterCon.createStatement();
// update internal states for fact_dim_relationship
metaExec(stmt,\"DELETE from fact_dim_relationship WHERE internal_state = -1 AND \" +
\" EXISTS (SELECT 1 FROM fact_dim_relationship WHERE internal_state = 1)\",\" SELECT 1 from fact_dim_relationship WHERE internal_state = -1 AND \" +
\" EXISTS (SELECT 1 FROM fact_dim_relationship WHERE internal_state = 1)\"); /*1*/
metaExec( stmt,\"UPDATE fact_dim_relationship SET internal_state = internal_state - 1 \" +
\" WHERE EXISTS (SELECT 1 FROM fact_dim_relationship inner1 \" +
\" WHERE inner1.internal_state = 1 \" +
\" AND inner1.fact_tbl_key = fact_dim_relationship.fact_tbl_key \" +
\" AND inner1.dim_base_key = fact_dim_relationship.dim_base_key ) \",\" SELECT 1 FROM fact_dim_relationship \" +
\" WHERE EXISTS (SELECT 1 FROM fact_dim_relationship inner1 \" +
\" WHERE inner1.internal_state = 1 \" +
\" AND inner1.fact_tbl_key = fact_dim_relationship.fact_tbl_key \" +
\" AND inner1.dim_base_key = fact_dim_relationship.dim_base_key ) \"); /*5*/
System.out.println(\"Update done on fact_dim_relationship\");
_repl.doDrop(SqlReplLogger.DB_META,stmt,\"fact_agg\",\"SELECT fact_agg_key FROM fact_agg f WHERE \" +
\" NOT EXISTS (SELECT 1 FROM fact_agg_letter l WHERE \" +
\" f.fact_agg_key = l.fact_agg_key) \"); /*6*/
_repl.doDrop(SqlReplLogger.DB_META,\"dim_base_agg\",\"SELECT dim_base_agg_key FROM dim_base_agg d WHERE \" +
\" NOT EXISTS (SELECT 1 FROM dim_base_agg_letter l WHERE \" +
\" d.dim_base_agg_key = l.dim_base_agg_key) \"); /*6*/
CheckOutOfSync(stmt,null); /*7*/
CheckOutOfSync(stmt,null); /*7*/
metaExec( stmt,\" update mirror_relationship set relation_to_current = \'Out Of Sync\' \" +
\" where dim_col_intmap_key is not null \" +
\" and relation_to_current = \'One Back\' \" +
\" and not exists ( \" +
\" select 1 \" +
\" from mirror_relationship m2,dim_col_view c,dim_col_intmap i \" +
\" where m2.dim_base_key = c.dim_base_key \" +
\" and c.dim_col_key = i.dim_col_key \" +
\" and i.dim_col_intmap_key = mirror_relationship.dim_col_intmap_key \" +
\" and m2.relation_to_current = \'One Back\') \",\" SELECT 1 FROM mirror_relationship \" +
\" where dim_col_intmap_key is not null \" +
\" and relation_to_current = \'One Back\' \" +
\" and not exists ( \" +
\" select 1 \" +
\" from mirror_relationship m2,dim_col_intmap i \" +
\" where m2.dim_base_key = c.dim_base_key \" +
\" and c.dim_col_key = i.dim_col_key \" +
\" and i.dim_col_intmap_key = mirror_relationship.dim_col_intmap_key \" +
\" and m2.relation_to_current = \'One Back\') \"); /*8*/
// clean out the tables used by mombuilder,aggbuilder,and semantics
metaExec( stmt,\"delete from relation_intermediary\",\"select 1 from relation_intermediary\" );
_repl.epiCenterCon.commit();
committed = true;
}
finally
{
safeMetaRollbackIfNeeded( committed );
_repl.safeClose( null,stmt );
}
} // end synchronized block
}
finally
{
_repl.epiCenterCon.setAutoCommit(oldAutoCommitStatus);
}
}
解决方法
如果仅这组特定查询，请使用
SET CONSTRAINT
BEGIN;
SET CONSTRAINT = xak1fact_dim_relationship DEFERRED;
-- Do your SQL
COMMIT;
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