class ActiveRecord::ConnectionAdapters::MySQL::Column

def auto_increment?
  extra == "auto_increment"
end

def case_sensitive?
  collation && !collation.end_with?("_ci")
end

def unsigned?
  /\bunsigned(?: zerofill)?\z/.match?(sql_type)
end

def virtual?
  /\b(?:VIRTUAL|STORED|PERSISTENT)\b/.match?(extra)
end