release-25.4: sql: add optimizer_use_max_frequency_selectivity session setting #156788
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The `optimizer_use_max_frequency_selectivity` session setting has been added. It is enabled by default. Disabling it reverts the selectivity improvements added in cockroachdb#151409. Release note: None
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Thanks for opening a backport. Before merging, please confirm that the change does not break backwards compatibility and otherwise complies with the backport policy. Include a brief release justification in the PR description explaining why the backport is appropriate. All backports must be reviewed by the TL for the owning area. While the stricter LTS policy does not yet apply, please exercise judgment and consider gating non-critical changes behind a disabled-by-default feature flag when appropriate. |
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Nov 3, 2025
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@michae2 reviewed 10 of 10 files at r1, all commit messages.
Reviewable status:complete! 1 of 0 LGTMs obtained (waiting on @mgartner)
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Backport 1/1 commits from #156654.
/cc @cockroachdb/release
The
optimizer_use_max_frequency_selectivitysession setting has beenadded. It is enabled by default. Disabling it reverts the selectivity
improvements added in #151409.
Release note: None
Release justification: Session setting for newly introduced optimizer
behavior.