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ORA-26711: remote table does not contain a primary key constraint ORACLE 报错 故障修复 远程处理

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ORA-26711: remote table does not contain a primary key constraint ORACLE 报错 故障修复 远程处理

文档解释

ORA-26711: remote table does not contain a primary key constraint

Cause: The master table for remote apply does not constain a primary key constraint or the primary key constraint has been disabled.

Action: Create a primary key constraint on the master table or enable the existing constraint.

ORA-26711: remote table does not contain a primary key constraint

该错误指示远程表不包含主键约束。

官方解释

ORA-26711表示,当查询一个远程表时产生了错误,因为表中没有主键约束。一个主键约束会确保每一行的数据的唯一性,集群表的聚集标准会依赖与之。当使用Oracle网络架构时,只有将远程表添加主键约束,才能正确运行,防止产生此错误。

常见案例

ORA-26711错误通常发生在当对远程表执行查询操作时,且表中没有主键约束。

一般处理方法及步骤

1. 确定该表的列的唯一性。

2. 若通过第一步的唯一性约束可以唯一定位每一行中的数据,可以在这几列上定义主键约束:

ALTER TABLE table_name

ADD CONSTRAINT pk_table_name

PRIMARY KEY (column_1, column_2,… column_n);

3. 如果没有一个列或组合的列可以唯一标识每一行,则添加一列并在该列定义主键约束,然后在每一行表中添加一个唯一值,如序列或者GUID:

ALTER TABLE table_name

ADD column_name INTEGER UNIQUE;

ALTER TABLE table_name

ADD CONSTRAINT pk_table_name

PRIMARY KEY (column_name);

4. 生成每一行的唯一值:

UPDATE table_name SET

column_name = (SELECT sequence_name.NEXTVAL FROM DUAL);

或者SQL Server环境下的GUID:

UPDATE table_name SET

column_name = CAST(NEWID() AS INTEGER);

5. 重新查询表:

SELECT column_1, column_2, … column_n FROM

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ORA-26711: remote table does not contain a primary key constraint ORACLE 报错 故障修复 远程处理

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