SQL Server语言 - Ruby，tiny_tds分段错误(构建树)

Question

require 'tiny_tds'
def client 
  client = TinyTds::Client.new username: 'user', password: 'pass', host: '192.168.4.4'
  client.execute('use database').do
  client
end
def services(id)
  out = []
  client.execute('exec GetServiceByServiceGroup @ServiceGroup = %s' % id).each(:symbolize_keys => true) do |s|
    out << {:value => s[:ServiceName] + ' <i>(' + s[:ServiceID].to_s + ')</i>',
      :child => operational_services(s[:ServiceID])}
  end
  out
end
def operational_services(id)
  out = []
  client.execute('exec GetOperationalServiceByService @Service = %s' % id).each(:symbolize_keys => true) do |os|
    out << {:value => os[:OperationalServiceName] + ' <i>(' + os[:OperationalServiceID].to_s + ')<i>'}
  end
  out
end
out = []
client.execute('exec GetServiceGroupByDirection @Direction = 50').each(:symbolize_keys => true) do |service_group|
  out << {:value => service_group[:ServiceGroupName] + ' <i>(' + service_group[:ServiceGroupID].to_s + ')</i>',
    :child => services(service_group[:ServiceGroupID])}
end
out

我采取错误：

test.irb:28: [BUG] Segmentation fault at 0x0000000000000e
ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux]

我想从数据库构建树级别的树，但tiny_tds返回我 sg =（ 为什么？我编写函数"客户端"以在当前返回值时对其他连接进行切割。否则tiny_tds说"尝试启动新的自适应服务器操作，结果挂起（TinyTds：：Error）"

我错在哪里？

Answer 1

我不知道

为什么，但这些工作

def client 
  if @client.nil?
    @client = TinyTds::Client.new username: 'user', password: 'pass', host: '192.168.4.4'
    @client.execute('use database').do
    def @client.execute(sql)
      puts sql
      super(sql).each(:symbolize_keys => true)
    end
  end
  @client
end