spell_ok $SPELL && local OLDVERSION="$(installed_version $SPELL)" || return 0

if [[ ${OLDVERSION%.*} != ${VERSION%.*} ]]; then
  message "${PROBLEM_COLOR}" &&
  message "You are about to upgrade (downgrade) your PostgreSQL installation to a" &&
  message "different major version, please be aware that a database repository will only" &&
  message "work with a specific major version of PostgreSQL. You need to make a dump of" &&
  message "your entire database system, create a new repository with the new PostgreSQL" &&
  message "version and import your dump. You should not continue with this upgrade" &&
  message "(downgrade) if you do not have a dump of your database system. If you need" &&
  message "help creating a dump of your database system see the PostgreSQL HOWTO at" && 
  message "(http://wiki.sourcemage.org/HowTo/Postgresql) for instructions." &&
  message "${DEFAULT_COLOR}" &&
  if ! query "Do you wish to upgrade PostgreSQL now?" n; then
    return 1
  fi
fi