[TYPO3-core] Warning in t3lib_db line 1047

[Stefan Geith]

Hi Devs,

when I update sites of my clients to 4.2.1
I get on some site warnings like this:

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource 
in /htdocs/typo3/typo3_src-4.2.1/t3lib/class.t3lib_db.php on line 1047

SourceCode:
   $columns_res = mysql_query('SHOW CHARACTER SET', $this->link);
   while ($row = mysql_fetch_assoc($columns_res)) {
     $output[$row['Charset']] = $row;
   }

Maybe the installed mySql doesnt support this query, so
I changed these lines to:
   $columns_res = mysql_query('SHOW CHARACTER SET', $this->link);
   if ($columns_res) while ($row = mysql_fetch_assoc($columns_res)) {
     $output[$row['Charset']] = $row;
   }

The sites now work without problems.

--------

Does anybody know what impact it has, if no
charsets can be read from mysql ?

Should the above change get applied to the core ?

Should i report a Bug ?
I found http://bugs.typo3.org/view.php?id=3794 but
this doens't seem to be exactly the same.

--------

Stefan