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Reduce V2 scan filtering, planning, and repeated file reads - #10844

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joseph-isaacs wants to merge 28 commits into

ji/codex/optimize-scan-v2-10799

Draft

Reduce V2 scan filtering, planning, and repeated file reads#10844
joseph-isaacs wants to merge 28 commits into
developfrom
ji/codex/optimize-scan-v2-10799

Commits on Oct 26, 2026
Commits on Oct 27, 2026
- perf(scan): avoid tiny V2 file partitions
  joseph-isaacs
  committed
  c1a961d
- perf: share filtered scan values across misaligned output batches
  joseph-isaacs
  committed
  fc4b26d
- Avoid expression partition annotations for single-domain scans
  joseph-isaacs
  committed
  eb29280
- Merge develop into optimize-scan-v2
  
  joseph-isaacs
  and
  claude
  committed
  80d6e3d
- Format V2 scan and DataFusion opener changes
  
  joseph-isaacs
  and
  claude
  committed
  dc96f26
- Fix clippy lints in V2 scan chunking and row-index planning
  
  joseph-isaacs
  and
  claude
  committed
  388c0cd
- Integrate measured scan improvements and resolve develop conflicts
  joseph-isaacs
  committed
  75932c7
- Adapt scan prefetch and cache lifetime coverage to engine-owned drivers
  joseph-isaacs
  committed
  83eadcb
- Fix scan test compilation and checked projection offsets
  joseph-isaacs
  committed
  c35fb2e
- Avoid prefetching dictionary values already retained by file scans
  joseph-isaacs
  committed
  b0caf5a
- Share filtered extension components across packed scan batches
  joseph-isaacs
  committed
  aa534ec
Commits on Oct 28, 2026
- Amortize filtered scan work and retain immutable file handles
  joseph-isaacs
  committed
  d88dd98
- Format file-handle lifetime test
  joseph-isaacs
  committed
  03e024b