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Advocate IV
Advocate IV

EVALUATE SELECTCOLUMNS() in background slows down report

I've begun using DaxStudio, and I noticed in a larger report of mine that any change is followed by hundreds of iterations of the following query for what seems to be every column:

EVALUATE SELECTCOLUMNS(FILTER(VALUES(table[column]),LEN(table[column])<=100),"valueColumn", table[column])

Most of these complete in 10-20 milliseconds. This occurs even on a blank page with all report-level filters cleared. However, for a larger table in the model (~1M rows) that requires a unique identifier text column, the query takes almost a minute. I am unsure what is causing this behaviour and whether there is anything that I can do to mitigate it. Unfortunately, I am unable to share the model or table. Does anyone have ideas what I could check or try to fix this?




Frequent Visitor

same problem here.. anyone solved? 

Please help

Not applicable

Did you ever figure this out? I am experiencing this same thing.

Any news on this ? I'm experiencing the same issue. 

Regular Visitor

Did you ever figure this out? I'm experiencing the same thing after downloading DAX Studio



What is your data source and what operations do you take in Query Editor of Power BI Desktop? How do you capture the above query?


Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

My data source is SQL server. I have ~70 tables, some with quite a number of steps. The above query was captured via Dax Studio.

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