Query events clarification

Sam37Sam37
in General Discussion

Hi

 

I see this message in Query events, trying to understand what does this mean.

 

"NO GROUPBY PUSHDOWN The optimizer couldn't push GroupBy past Join

 

Aggregate columns not materialized; can't do pushdown."

 

though suggested action say no user action is needed, Wondering what is this message for, how do we interpret it.

 

Thanks much

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