feat(cubesql): Support MEASURE SQL push down
#8606
Open
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Description of Changes Made
This PR adds push down for
MEASUREaggregate function, replacing it with the aggregate function of the respective measure. It additionally improves error thrown byMEASUREfunction when it cannot be pushed down (the original error thrown wasoneshot cancelled, which does not help). The new error message should help users resolve the issue themselves should they stumble upon it.