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[Test only] Backport #10852 (Auto RowSelection construction) to 59_maintenance - #10885

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[Test only] Backport #10852 (Auto RowSelection construction) to 59_maintenance#10885
alamb wants to merge 5 commits into
apache:59_maintenancefrom
alamb:test-10852-59-maintenance

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@alamb

@alamb alamb commented Aug 27, 2026

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Which issue does this PR close?

Rationale for this change

Draft backport of #10852 onto 59_maintenance so I can test the performance of that change against the 59 release line. Not intended for merge.

What changes are included in this PR?

Cherry-pick of the four commits from #10852, plus two small adaptations for 59_maintenance:

  • Kept the mask_to_selectors import in read_plan.rs (still used on this branch)
  • rand::RngExtrand::Rng (this branch pins rand 0.9)

Are these changes tested?

Yes, by the tests brought over from #10852.

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