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Don Burleson Blog 







How to move a table with a LOB column

Oracle Database Tips by Donald BurlesonMay 15, 2015


Question: I want to move a table to a new tablespace, but it has a CLOB data types column.  How can I move or copy a table that contains a LOB, CLOB or BLOB?  The documentation says that LOB indexes cannot be renamed, rebuilt, or modified.  How to I move a LOB table to another tablespace?

Answer: While it's true that "alter table xxx move lob" does support large object columns (long raw, BLOB, CLOB), you can still use CTAS to move the table.  You can use "create table as select" (CTAS) to copy/move tables with LOB columns:

create table t1
as select * from mytab
tablespace newts;

drop tale;

rename t1 to mytable;

For the CLOB indexes, just punch the index DDL with dbms_metadata, and rebuild the index after copying the table data.




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