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…puts Each ingestion-time output the query side reads (the executor's materialization frontier) reads one tumbling pane of raw samples. Outputs that differ only in which pane they read share one SummaryDefinition, identified by a SHA-256 of their sub-DAG with TimeShift offsets zeroed. Each output binds to its definition with an offset: at evaluation time T it reads the pane ending at T - offset. SummaryStore keeps built panes by definition and end. #509 Example 4b's six 10-minute KLL panes become one definition with offsets 0..50 min. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This was referenced Oct 7, 2026
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Stack 2/5. Base: #818. Next: #820.
Before this PR
The data plane loaded the plan but didn't know which outputs it had to store.
After this PR
Sds::from_dagturns the plan's ingestion-time frontier into stored-summary definitions:TimeRange(width) ← TimeShift(offset)* ← Scan. That makes it a pane ofwidthending atT − offset; any other shape is rejected asUnsupportedShape.TimeShiftoffsets zeroed. In Example 4b, the six 10-minute KLL panes become one definition with offsets 0, 10, …, 50 min.SummaryStorekeeps panes by(definition, end)and evicts them by end time.Testing
data_plane/tests/sds.rs(6 tests): sharing, offsets, identity, rejected shapes, store eviction.🤖 Generated with Claude Code