ORA-14416：Online DDL's cannot be used string
错误码
错误描述：Online DDL's cannot be used string
错误原因：An attempt was made to use the DROP INDEX ONLINE, ALTER TABLE DROP CONSTRAINT ONLINE, or ALTER TABLE SET UNUSED COLUMN ONLINE statement on an table type (for example, cluster, temporary, index-organized table (IOT), external tables) that was not allowed.
解决方法：Using online DDL's like DROP INDEX ONLINE, ALTER TABLE DROP CONSTRAINT ONLINE, or ALTER TABLE SET UNUSED COLUMN ONLINE statement on certain types of tables (for example, cluster, temporary, indexed-organized table (IOT), external tables) is illegal. Remove the ONLINE keyword from the statement.
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