ESQL: fix COUNT filter pushdown (#117503) #117652
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If `COUNT` agg has a filter applied, this must also be push down to source. This currently does not happen, but this issue is masked currently by two factors: * a logical optimisation, `ExtractAggregateCommonFilter` that extracts the filter out of the STATS entirely (and pushes it to source then from a `WHERE`); * the phisical plan optimisation implementing the push down, `PushStatsToSource`, currently only applies if there's just one agg function to push down. However, this fix needs to be applied since: * it's still present in versions prior to `ExtractAggregateCommonFilter` introduction; * the defect might resurface when the restriction in `PushStatsToSource` is lifted. Fixes elastic#115522. (cherry picked from commit 560e0c5)
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If
COUNTagg has a filter applied, this must also be push down to source. This currently does not happen, but this issue is masked currently by two factors:ExtractAggregateCommonFilterthat extracts the filter out of the STATS entirely (and pushes it to source then from aWHERE);PushStatsToSource, currently only applies if there's just one agg function to push down.However, this fix needs to be applied since:
ExtractAggregateCommonFilterintroduction;PushStatsToSourceis lifted.Fixes #115522.
(cherry picked from commit 560e0c5)