[ESQL] Plug TopN agg groupings filtering into the language#130111
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ivancea wants to merge 95 commits intoelastic:mainfrom
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[ESQL] Plug TopN agg groupings filtering into the language#130111ivancea wants to merge 95 commits intoelastic:mainfrom
ivancea wants to merge 95 commits intoelastic:mainfrom
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…cs, and added it to benchmark
# Conflicts: # x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/aggregation/blockhash/BlockHashTests.java
ivancea
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Jun 27, 2025
| aggregatorFactories, | ||
| context.pageSize(ts.estimatedRowSize()) | ||
| context.pageSize(ts.estimatedRowSize()), | ||
| context.queryPragmas().maxTopNAggsLimit() |
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Here we inject the pragma
# Conflicts: # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/planner/mapper/Mapper.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LocalPhysicalPlanOptimizerTests.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LogicalPlanOptimizerTests.java
# Conflicts: # x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/OrdinalsGroupingOperator.java # x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/OperatorTests.java # x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/HashAggregationOperatorTests.java # x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/planner/AbstractPhysicalOperationProviders.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/PhysicalPlanOptimizerTests.java # x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/planner/TestPhysicalOperationProviders.java
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Continuation of #127148
Depends on #129633 (Bug fix)The first PR added a new
TopNBlockHashthat skips non-topN groups for specific cases (TopNafterAggregate, sharing the same attributes for groups/order).This PR plugs it into the language:
TopN+AggregatetoTopNAggregate. This is done at the very end, so other logical rules remain unchangedTopNAggregatetoTopNAggregateExecTopNis converted toLimitandSortat the beginning, here we do the same convertingTopNAggregatetoTopNandAggregateTopNAggregateExecis a child class ofAggregateExec, so most rules still apply. Some other were updatedAlso, a new pragma was added (
max_top_n_aggs_limit) to limit the maximum TopN limit after which the TopNBlockHash will be used. This is temporary until we use better index statistics.Draft
TopNAggregatecan't be serialized to older nodes. This must be fixed before merging.A potential solution could be applying the pragma at logical plan optimization level, and skip the rule there instead of at physical plan to operator conversion. However, we don't have (currently) the pragmas accesible within the rulesFuture changes
OrdinalsGroupingOperatorto use the pragma for its BlockHash, if it makes sense