pluggable database 不允許執行日誌切換語句，執行的話會報這個錯誤，需要再cdb下執行alter system switch logfile
PURPOSE
This is a brief reference note to show the meaning of database error "ORA-65040". It includes the error text, "Cause" and "Action" from message files for each database version from 9.2 onwards, along with search links and details of any database bug issues related to the error.
SCOPE
This note is intended for general audience as a starting point to check the meaning of "ORA-65040". It does not give detailed information about the error and does not give error message text for versions below 9.2 .
DETAILS
Error Text, Cause and Action from Message File/s for ORA-65040
Versions 12.1
Error: ORA-65040 operation not allowed from within a pluggable database
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Cause: An operation was attempted that can only be performed in the root
container.
Action: Switch to the root container to perform the operation.
Search Links for ORA-65040