Question

I am using PDO for php and. Parameters are binding right. However when I check my mysql-query.log on CentOS 5.6

I get the following

UPDATE 
  ^ M site_folder_pages ^ M 
SET
  ^ M ^ M title = 'Schanz, Hermann',
  ^ M `desc` = 'Telefonnummer, E-Mailadresse',
  ^ M declared_encoding = NULL,
  ^ M detected_encoding = NULL,
  ^ M word_count = '230',
  ^ M last_checked = NOW(),
  ^ M date_modified = NOW() ^ M 
WHERE ^ M url_hash = '0001843c8b7bb28b46323fd1e8a3efa5' ^ M 
  AND site_id = '52f2b2940f79c1f7d623b066b2bce2e5' 

Having this, I am not really sure if this query was executed right or the “^M” character was only added on the log file and not the actual query.

Doing a quick search in google I also find queries with the same characters:
Query with ^M

Is it just on the log? or is it really executed with that character hence there was an error during the execution?

Answer 1

^M is the on-screen representation of a carriage return in many UNIX terminals. What you’re probably looking at is a log file and/or query string containing Windows-style line endings (\r\n), but reading it in UNIX mode (\n) and thus the carriage returns (\r = ^M) are showing up.

Since both \r and \n are whitespace characters, MySQL ignores them, so it won’t cause an actual problem.