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feat(core): scaffold PrefixMergeExec for cross-partition windowed-aggregate state merge #2211

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feat(core): scaffold PrefixMergeExec for cross-partition windowed-aggregate state merge #2211

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e80aa81
feat(core): scaffold PrefixMergeExec for cross-partition windowed-agg…
avantgardnerio Jul 30, 2026
fe8bb2a
docs(prefix-merge): clarify scheduler/executor division of labor
avantgardnerio Jul 30, 2026
11f2129
feat(prefix-merge): add WindowApply / ScalarOp descriptors for per-co…
avantgardnerio Jul 30, 2026
115e511
feat(prefix-merge): implement WindowApply::Aggregate — real per-row s…
avantgardnerio Jul 30, 2026
201ebea
test(prefix-merge): add AVG cross-partition demo
avantgardnerio Jul 30, 2026
1ab1f26
feat(prefix-merge): implement WindowApply::Scalar via arrow kernels +…
avantgardnerio Jul 30, 2026
3955e1a
refactor(prefix-merge): drop PARTITION BY keying to match DF-side sim…
avantgardnerio Jul 30, 2026
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2 changes: 2 additions & 0 deletions ballista/core/src/execution_plans/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ mod distributed_explain_analyze;
mod distributed_query;
mod ordered_range_repartition;
mod per_partition_filter;
mod prefix_merge;
mod range_repartition_common;
mod runtime_stats;
mod shuffle_reader;
Expand All @@ -42,6 +43,7 @@ pub use distributed_explain_analyze::DistributedExplainAnalyzeExec;
pub use distributed_query::{DistributedQueryExec, execute_physical_plan};
pub use ordered_range_repartition::OrderedRangeRepartitionExec;
pub use per_partition_filter::PerPartitionFilterExec;
pub use prefix_merge::{FinalizedPartitionState, PrefixMergeExec, ScalarOp, WindowApply};
pub use runtime_stats::{
MergedRuntimeStats, RuntimeStatsExec, TaskRuntimeStats,
collect_reports as collect_runtime_stats_reports, log_merged_runtime_stats,
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