Article ID: 120681, created on Mar 22, 2014, last review on Apr 29, 2014

  • Applies to:
  • Plesk 11.0 for Linux


The following error is appeared when connecting to the panel:

    ERROR: PleskMainDBException
    MySQL query failed: Unknown column '' in 'where clause'

    0: common_func.php3:220
        db_query(string 'SELECT login, type, ip_address, ip_dual_stack FROM sessions WHERE sess_id=""')
    1: class.Session.php:420
        Session->init(string '')
    2: auth.php3:197


MySQL configuration file /etc/my.cnf contains following setting:


With ANSI_QUOTES enabled, you cannot use double quotation marks to quote literal strings, because it is interpreted as an identifier.


Comment this line or delete it in /etc/my.cnf and restart mysql server:

    #/etc/init.d/mysql stop
    #/etc/init.d/mysql start

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