BiteTheDDDDt opened a new pull request, #64637:
URL: https://github.com/apache/doris/pull/64637
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: When `enable_adjust_conjunct_order_by_cost` is enabled,
conjuncts are sorted by `execute_cost` with `std::ranges::sort`. Equal-cost
conjuncts may have their original relative order changed, which can introduce
unnecessary evaluation-order side effects. This patch switches the cost
ordering paths to `std::ranges::stable_sort` so lower-cost conjuncts are still
prioritized while equal-cost conjuncts keep their original order.
### Release note
None
### Check List (For Author)
- Test: Manual test
- Ran `clang-format` v16 on changed C++ files
- Ran `git diff --check`
- BE build was started but interrupted per request; not used as
validation
- Behavior changed: Yes. Equal-cost conjuncts now preserve their original
order when `enable_adjust_conjunct_order_by_cost` is enabled.
- Does this need documentation: No
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