ORA-23338: priority or value already in priority group string ORACLE 报错 故障修复 远程处理

文档解释

ORA-23338: priority or value already in priority group string

Cause: The specified value or priority has already been registered as part of the priority group.

Action: Either specify a different value or priority that not already part of the priority group, or drop the value to the priority group.

ORA-23338错误指示priority参数中包含重复的值。

官方解释

ORA-23338: priority or value already in priority group string

Cause: A PRIORITY or a VALUE attribute was specified more than once in the PRIORITY GROUP or PERCENTILE GROUP.

Action: Make sure that PRIORITY or VALUE values are unique in a priority group.

常见案例

ORA-23338错误通常是由于在PRIORITY GROUP或PERCENTILE GROUP（window组）中重复指定PRIORITY或VALUE属性的结果。如下所示：我们将两次指定值为2的priority属性：

CREATE MATERIALIZED VIEW mview

REFRESH PRIORITY group group1

USING DEFAULT

COALESCE

USING PRIORITY (2, 2);

一般处理方法及步骤

修正ORA-23338错误的最佳方法是将priority group或percentile group（窗口组）中的重复参数替换为其他唯一值，以避免冲突。例如，我们可以编辑以上示例，替换其中的第二个参数，如下所示：

CREATE MATERIALIZED VIEW mview

REFRESH PRIORITY group group1

USING DEFAULT

COALESCE

USING PRIORITY (2, 3);