Use LAG for _prev_data #231
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Without explain/analyze plans over realistic large datasets to show it's more performant, it's unlikely I can approve. I can't tell you if it would be more performant by looking at it unfortunately |
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Would this be an improvement? With the subqyer approach there's the risk of having N+1 queries where the LAG might be more efficient?
I don't have any real world data in my pghistory tables yet to test, but I though it might be good to pop the question here.