PostgresDB 2200S: Invalid XML Comment

The XML comment is invalid.
  1. Identify the query or transaction that's generating the 2200S: Invalid XML Comment error. If you have access to the application or script running queries, check its logs for recent SQL statements sent to PostgreSQL.
  2. Once identified, review the specific SQL query for any XML-related functions or operations, especially those attempting to create or manipulate XML comments. Look for syntax like xmlcomment, XMLELEMENT, etc.
  3. Validate the XML content being passed into the SQL query. Ensure that the comment does not contain --, as XML comments cannot contain -- inside them. Use an online XML validator if necessary.
  4. Correct the XML content by either modifying the application logic that generates this XML or by directly adjusting the SQL query. For instance, if you found an invalid XML comment in the query, adjust it to ensure it's valid. For example:
  5. SELECT xmlelement(name "root", xmlcomment('Valid comment here'));
  6. If the error is due to dynamic XML generation or manipulation, consider adding validation logic in the application to catch invalid XML comments before they are sent to the database.
  7. Re-run the corrected SQL query or application logic to confirm the error is resolved.
  8. If the problem persists, consider isolating the issue by running a simple XML-related query to ensure the PostgreSQL XML functions are working as expected, for example:
  9. SELECT xmlcomment('Test comment');
  10. Monitor the application and database logs for any recurrence of the error.

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