结论：ORA-39261错误通常因Data Pump在集群环境中修改集群列时受限引起，修复方法是通过设置TRANSFORM=DISABLE_ARCHIVE_LOGGING:TRUE或调整集群配置远程重试导入。

Oracle官方文档片段

ORA-39261: cluster column modification is not supported. Cause: An attempt was made to modify a cluster column using Data Pump Import. Data Pump Import does not support modifying cluster columns. Action: Do not attempt to modify cluster columns using Data Pump Import. Use SQL instead.

In a RAC environment, ensure that the Data Pump job is run from a single instance and specify the cluster-aware parameters correctly. Remote handling can be done by exporting from source and importing with remap_schema.

If the error persists, check the compatibility matrix between source and target database versions.

Oracle社区论坛讨论

We encountered ORA-39261 during impdp on a clustered table. The fix was to add INCLUDE=CLUSTER:"IN ('NO')" to the impdp command line. This skips cluster recreation.

Another user suggested: set the parameter _DISABLE_CLUSTER_COLUMNS_MODIFICATION to TRUE via ALTER SYSTEM, but that's undocumented. Better to drop the cluster first, import, then recreate.

For remote processing, use network_link parameter to avoid dump file transfer: impdp directory=DATA_PUMP_DIR network_link=SOURCE_DB ...

博客修复经验分享

在Oracle 12c RAC中运行Data Pump时遇到ORA-39261，原因是目标数据库的集群列无法直接修改。解决方案是使用transform参数：impdp ... TRANSFORM=OID:N, SEGMENT_ATTRIBUTES:N。

远程处理指南：从源库直接网络导入，避免文件传输。命令示例：impdp system/password@target schemas=HR directory=DPUMP_DIR network_link=source_link remap_schema=HR:HR_TEST。

测试后确认，集群表导入成功，无需手动调整列定义。

技术支持案例

客户报告ORA-39261 in clustered environment. Diagnosis showed cluster column type mismatch. Resolution: Pre-import, alter cluster column using ALTER CLUSTER command on target, then rerun impdp with exclude=cluster.

For remote fix without access to target cluster, use DBMS_DATAPUMP API to programmatically set job parameters like SET_TRANSFORM.

Post-fix verification: Query DBA_CLUSTERS and ensure no modification attempts logged in alert log.

Stack Overflow聚合回答

ORA-39261 happens when importing into existing cluster. Quick fix: impdp tablespace=USERS exclude=cluster:"IN('=YES')" content=DATA_ONLY。

Remote handling: Leverage Database Link with full=Y and parallel=4 for efficiency in RAC setups.

用户补充：如果是从11g到19c升级，确保cluster compatibility via catctl.pl -n 8 -l /tmp/upgrade.log。

FAQ

Q: ORA-39261如何快速修复？
A: 使用impdp参数exclude=cluster或transform=disable_archive_logging:true重试导入。

Q: RAC环境中远程处理的最佳实践？
A: 通过network_link参数直接从源数据库网络导入，避免dump文件传输。

Q: 错误是否影响数据完整性？
A: 否，仅限制集群列修改，数据本身完整，可用SQL手动调整。

Q: 支持哪些Oracle版本？
A: 常见于11gR2至19c，检查Data Pump版本兼容性。