Question

如果我这样做：

import time
import random
import datetime

class TimeoutException(Exception):
    def __init__(self, *args, **kwargs):
        Exception.__init__(self, *args, **kwargs)

def busy_work():

    # Pretend to do something useful
    time.sleep(random.uniform(0.3, 0.6))

def train_loadbatch_from_lists(batch_size, timeout_sec):

    time_start = datetime.datetime.now()
    batch_xs = []
    batch_ys = []

    for i in range(0, batch_size+1):
        busy_work()
        batch_xs.append(i)
        batch_ys.append(i)

        time_elapsed = datetime.datetime.now() - time_start
        print 'Elapsed:', time_elapsed
        if time_elapsed > timeout_sec:
            raise TimeoutException()

    return batch_xs, batch_ys

def main():

    timeout_sec = datetime.timedelta(seconds=5)
    batch_size = 10
    try:
        print 'Processing batch'
        batch_xs, batch_ys = train_loadbatch_from_lists(batch_size, timeout_sec)
        print 'Completed successfully'
        print batch_xs, batch_ys
    except TimeoutException, e:
        print 'Timeout after processing N records'

if __name__ == '__main__':
    main()

我明白了：

然而，如果我们注释掉Event关键字：

SELECT 
  NON EMPTY 
    [Measures].[Internet Sales Amount] ON COLUMNS
 ,NON EMPTY 
    {
      Hierarchize
      ( EXISTING
        {
          [Product].[Product Categories].[Product].&[483]
         ,[Product].[Product Categories].[Product].&[486]
         ,[Product].[Product Categories].[Product].&[478]
         ,[Product].[Product Categories].[Product].&[479]
         ,[Product].[Product Categories].[Product].&[477]
         ,[Product].[Product Categories].[Product].&[484]
         ,[Product].[Product Categories].[Product].&[485]
         ,[Product].[Product Categories].[Product].&[317]
         ,[Product].[Product Categories].[Product].&[316]
         ,[Product].[Product Categories].[Product].&[583]
         ,[Product].[Product Categories].[Product].&[311]
         ,[Product].[Product Categories].[Product].&[594]
        }
      )
    } ON ROWS
FROM [Adventure Works]
WHERE 
  [Product].[Product Model Lines].[Product Line].&[M];

我们得到以下信息：

我们使用Pyramid前端。本来希望那里的人可以在他们的mdx渲染引擎中包含EXISTING关键字，这样用户就不必担心这个错误了。

这绝对是个错误吗？

包含SELECT NON EMPTY [Measures].[Internet Sales Amount] ON COLUMNS ,NON EMPTY { Hierarchize ( --EXISTING { [Product].[Product Categories].[Product].&[483] ,[Product].[Product Categories].[Product].&[486] ,[Product].[Product Categories].[Product].&[478] ,[Product].[Product Categories].[Product].&[479] ,[Product].[Product Categories].[Product].&[477] ,[Product].[Product Categories].[Product].&[484] ,[Product].[Product Categories].[Product].&[485] ,[Product].[Product Categories].[Product].&[317] ,[Product].[Product Categories].[Product].&[316] ,[Product].[Product Categories].[Product].&[583] ,[Product].[Product Categories].[Product].&[311] ,[Product].[Product Categories].[Product].&[594] } ) } ON ROWS FROM [Adventure Works] WHERE [Product].[Product Model Lines].[Product Line].&[M];是否表示脚本运行速度较慢？

有趣的mdx bug？

0 个答案: