Search notes:

ORA-65503: cannot send or receive temporary LOB locators over a database link

This statement is ok.
select sql_text     from v$sql@db_far_away;
sql_fulltext is a CLOB and cannot be transmitted over a database link:
select sql_fulltext from v$sql@db_far_away;
-- ORA-65503: cannot send or receive temporary LOB locators over a database link
-- ORA-02063: preceding line from XYZ

TODO

I was unable to replicate the error message in 23c.

See also

LOB datatypes
Database links
Other Oracle error messages

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