{keyword}');select Dbms_pipe.receive_message(chr(107)||chr(72)||chr(88)||chr(67),5) From Dual-- -

If you encountered this in a log or a search field, it is likely an automated probe by a security scanner or an attacker trying to identify vulnerabilities. CHR - Oracle Help Center

: A SQL comment used to ignore the rest of the original query, preventing syntax errors. If you encountered this in a log or

: A special dummy table in Oracle used for selecting results from functions that don't belong to a specific table. If you encountered this in a log or