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

: This part is intended to break out of a preceding SQL string (like a search filter or input field) by closing a single quote and a parenthesis.

: These CHR functions convert numeric ASCII values into characters to bypass security filters that might block specific words like "PIPE". 107 = k 72 = H 88 = X 67 = C Result: kHXC (the name of the pipe to listen to).

: A SQL comment used to ignore the rest of the original query, preventing syntax errors. : This part is intended to break out

: An Oracle subprogram typically used for communication between database sessions.

: A special dummy table in Oracle used for selecting results from functions that don't belong to a specific table. : A SQL comment used to ignore the

The command DBMS_PIPE.RECEIVE_MESSAGE(CHR(107)||CHR(72)||CHR(88)||CHR(67),5) attempts to force the database to pause for . Breakdown of the Code:

: This is the timeout argument in seconds. If the database takes exactly 5 seconds to respond, it confirms to an attacker that the system is vulnerable to SQL injection. The command DBMS_PIPE

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