exim 4.84 mysql problem

remote_smtp:
  driver                = smtp
  headers_remove        = X-Spam-Report:X-Spam-Bar

local_delivery:
  driver        = appendfile
#  file         = /var/mail/$local_part
#  directory    = /home/$local_part/.maildir
  directory     = /var/mail/${local_part}/
  maildir_format
  delivery_date_add
  envelope_to_add
  return_path_add
  group         = mail
  mode          = 0660

local_mysql_delivery:
  driver        = appendfile
#  file         = /var/mail/$local_part
#  directory    = /home/$local_part/.maildir
  directory     = /var/mail/${domain}/${local_part}/
  maildir_format
  delivery_date_add
  envelope_to_add
  return_path_add
  user          = mail
  group         = mail
  mode          = 0660
# at this time, we know a local user to get his individual preferences to tag the mail
# the '${eval:$header_X-Spam-Score-Int:}' is is a hack to cope with negative ints that seem to be parsed as strings, thus failing the
# comparsion
# if there's no X-Spam-Score-Int header set by data-acl above, don't panic ;-)
# another hack is that we remove important headers, we add later to be sure there are no multiple versions from earlier relays, or
# forged ones (this is BUGGY right now as it merges all equal headers!)
#     therefore i implemented the ${sg{$header_X-Spam-Score-Int:}{^.*\n}{}} regex hack, that strips all

headers_remove = Subject : X-Spam-Flag : X-Spam-Score-Int : X-Spam-Score : X-Spam-Bar : X-Spam-Report
headers_add   = "X-Spam-Threshold: ${lookup mysql{ \
                                        SELECT spam_threshold \
                                        FROM user \
                                        WHERE username='${quote_mysql:$local_part}' \
                                        AND domain='${quote_mysql:$domain}' \
                                        AND SMTP_allowed='YES' \
                                      }{$value}{ERROR}}\n\
                  X-Spam-Score: $header_X-Spam-Score:\n\
                  X-Spam-Score-Int: $header_X-Spam-Score-Int:\n\
                  X-Spam-Bar: $header_X-Spam-Bar:\n\
                  X-Spam-Report: $header_X-Spam-Report:\n\
                  X-Spam-Flag: ${if def:header_X-Spam-Score-Int:{\
                                        ${if >={${eval:${sg{$header_X-Spam-Score-Int:}{^.*\n}{}}}}\
                                                {${lookup mysql{ \
                                                        SELECT spam_threshold*10 \
                                                        FROM user \
                                                        WHERE username='${quote_mysql:$local_part}' \
                                                        AND domain='${quote_mysql:$domain}' \
                                                        AND SMTP_allowed='YES' \
                                                }{$value}{ERROR}}}{YES}{NO}}\
                                        }{\
                                        UNKNOWN\
                                }}\n\
                  Subject: ${if def:header_X-Spam-Score-Int:{\
                                        ${if >={${eval:${sg{$header_X-Spam-Score-Int:}{^.*\n}{}}}}\
                                                {${lookup mysql{ \
                                                        SELECT spam_threshold*10 \
                                                        FROM user \
                                                        WHERE username='${quote_mysql:$local_part}' \
                                                        AND domain='${quote_mysql:$domain}' \
                                                        AND SMTP_allowed='YES' \
                                                }{$value}{ERROR}}}{YES}{NO}}\
                                        }{\
                                        UNKNOWN\
                                }}\n\
                  Subject: ${if def:header_X-Spam-Score-Int:{\
                                        ${if >={${eval:${sg{$header_X-Spam-Score-Int:}{^.*\n}{}}}}\
                                                {${lookup mysql{ \
                                                        SELECT spam_threshold*10 \
                                                        FROM user \
                                                        WHERE username='${quote_mysql:$local_part}' \
                                                        AND domain='${quote_mysql:$domain}' \
                                                        AND SMTP_allowed='YES' \
                                                }{$value}{ERROR}}}{${lookup mysql{ \
                                                                        SELECT spam_tag \
                                                                        FROM user \
                                                                        WHERE username='${quote_mysql:$local_part}' \
                                                                        AND domain='${quote_mysql:$domain}' \
                                                                        AND SMTP_allowed='YES' \
                                                                   }{$value}{ERROR}}$h_subject:}{$h_subject:}}\
                                }{$h_subject:}}\n\
                  X-Delivered-To: $original_local_part@$original_domain ($local_part@$domain)\n\
                  X-Message-Age: $message_age"