ORA-14298: LOB column block size mismatch in ALTER TABLE EXCHANGE [SUB]PARTITION

文档解释

ORA-14298: LOB column block size mismatch in ALTER TABLE EXCHANGE [SUB]PARTITION

Cause: The block sizes of a pair of corresponding LOB columns of the two tables specified in the ALTER TABLE EXCHANGE [SUB]PARTITION statement are different.

Action: Ensure that the block sizes of corresponding pairs of LOB columns of the tables involved in the ALTER TABLE EXCHANGE [SUB]PARTITION statement are the same.

官方解释

ORA-14298:”LOB column block size mismatch in ALTER TABLE EXCHANGE [SUB]PARTITION”,意思是”使用ALTER TABLE EXCHANGE [SUB]PARTITION 命令与某个LDT(大对象数据类型)列大小不匹配”。

常见案例

正常处理方法及步骤

1)重新指定子句中涉及到的分区块大小;

2)确保要交换的LDT字段块大小是一样的;

3)尝试更改表的块大小,以增加源表中的LOB列的大小;

4)尝试重新构建原始的表,并使用正确的列块大小;

5)或者在alter table exchange partition 子句中指定具有相同块大小的替代表;

6)仔细检查目标表和源表中分区重叠情况,并按需修改分区名称。

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