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Module aggregate

Module aggregate 

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ArrayOp::Aggregate handler for NodeDB-Lite.

Scans all segments and the memtable, applies aggregate_attr (or group_by_dim) per tile, then merges partials across tiles via AggregateResult::merge. Bitemporal system-time ceiling is honoured: tiles whose system_from_ms exceeds the cutoff are skipped, mirroring the same filter applied in engine.rs::slice.

Functions§

aggregate
Execute ArrayOp::Aggregate for the Lite engine.