[Backport 2.x] Unify precomputation of aggregations behind a common API #17197
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* Unify precomputation of aggregations behind a common API We've had a series of aggregation speedups that use the same strategy: instead of iterating through documents that match the query one-by-one, we can look at a Lucene segment and compute the aggregation directly (if some particular conditions are met). In every case, we've hooked that into custom logic hijacks the getLeafCollector method and throws CollectionTerminatedException. This creates the illusion that we're implementing a custom LeafCollector, when really we're not collecting at all (which is the whole point). With this refactoring, the mechanism (hijacking getLeafCollector) is moved into AggregatorBase. Aggregators that have a strategy to precompute their answer can override tryPrecomputeAggregationForLeaf, which is expected to return true if they managed to precompute. This should also make it easier to keep track of which aggregations have precomputation approaches (since they override this method). Signed-off-by: Michael Froh <[email protected]> * Remove subaggregator check from CompositeAggregator Not sure why I added this, when the existing implementation didn't have it. That said, we *should* call finishLeaf() before precomputing the current leaf. Signed-off-by: Michael Froh <[email protected]> * Resolve conflicts with star-tree changes Signed-off-by: Michael Froh <[email protected]> * Skip precomputation when valuesSource is null Signed-off-by: Michael Froh <[email protected]> * Add comment as suggested by @bowenlan-amzn Signed-off-by: Michael Froh <[email protected]> --------- Signed-off-by: Michael Froh <[email protected]> (cherry picked from commit 2847695) Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
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❕ Gradle check result for a751d6d: UNSTABLE Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure. |
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## 2.x #17197 +/- ##
============================================
+ Coverage 71.98% 72.00% +0.02%
+ Complexity 65987 65982 -5
============================================
Files 5341 5341
Lines 307114 307152 +38
Branches 44824 44822 -2
============================================
+ Hits 221068 221171 +103
+ Misses 67608 67576 -32
+ Partials 18438 18405 -33 ☔ View full report in Codecov by Sentry. |
sandeshkr419
approved these changes
Jan 30, 2025
msfroh
approved these changes
Jan 30, 2025
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Backport 2847695 from #16733.