Question

我写了以下MDX查询：

 SUM(
        (
        Filter  
            ([Shop].[Shop ID].[Shop ID].Members,
            IsEmpty(([Time].[Calendar].CurrentMember)) 
            = false
            AND
            IsEmpty(([Time].[Calendar].CurrentMember.Lag(1))) 
            = false
            AND
            IsEmpty(([Time].[Calendar].CurrentMember.Lag(2))) 
            = false)
        ,
        [Measures].[Real weight]
        )
    )

然而它运作缓慢。我相信我可以加快速度。有任何想法吗？我已经阅读了以下博客，但它对我帮助不大。可能我会错过那里重要的事情：

http://sqlblog.com/blogs/mosha/archive/2005/02/13/performance-of-aggregating-data-from-lower-levels-in-mdx.aspx

提前致谢！

修改：

对不起，请在此处找到答案：http://sqlblog.com/blogs/mosha/archive/2008/10/22/optimizing-mdx-aggregation-functions.aspx

SUM([Shop].[Shop ID].[Shop ID].Members,
        (
        IIF(

            IsEmpty(([Time].[Calendar].CurrentMember,[Measures].[Real weight])) 
            = false
            AND
            IsEmpty(([Time].[Calendar].CurrentMember.Lag(1),[Measures].[Real weight])) 
            = false
            AND
            IsEmpty(([Time].[Calendar].CurrentMember.Lag(2),[Measures].[Real weight])) 
            = true

            ,
            [Measures].[Real weight]
            ,
            NULL)
        ))

Answer 1

对不起，请在此处找到答案：http://sqlblog.com/blogs/mosha/archive/2008/10/22/optimizing-mdx-aggregation-functions.aspx

SUM([Shop].[Shop ID].[Shop ID].Members,
        (
        IIF(

            IsEmpty(([Time].[Calendar].CurrentMember,[Measures].[Real weight])) 
            = false
            AND
            IsEmpty(([Time].[Calendar].CurrentMember.Lag(1),[Measures].[Real weight])) 
            = false
            AND
            IsEmpty(([Time].[Calendar].CurrentMember.Lag(2),[Measures].[Real weight])) 
            = true

            ,
            [Measures].[Real weight]
            ,
            NULL)
        ))

加快SUM和Filter功能

1 个答案: