2025-11-05

Power Query Folding and Execution Order in Power BI

Power BI is lying to you. Those neat, orderly “Applied Steps” you trust are a façade. Power Query is secretly rearranging, deferring, collapsing and sometimes ignoring the way you wrote your transform steps — which is why your filters don’t filter, your merges get weird, and refreshes suddenly go from 20 seconds to 10 minutes. The only way to stop getting blindsided is to understand the invisible engine + query folding… because THAT is the real execution order — not the thing you see in the pane.

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Power Query Folding and Execution Order in Power BI (English)