adriangb opened a new pull request, #20834:
URL: https://github.com/apache/datafusion/pull/20834
## Summary
- Add 17 new benchmarks to `sql_planner.rs` that stress the logical
optimizer across different dimensions:
- **Plan node scaling**: join chains with 4, 8, and 16 tables
- **Expression scaling**: 50-200 filter predicates, 100 aggregate
expressions, 50 CASE expressions
- **Mixed deep+wide**: joins combined with aggregates, filters, sorts,
limits
- **Subqueries**: correlated EXISTS, IN, scalar subqueries, and multiple
combined subqueries
- **Unions**: 4 and 8 branch UNION ALL queries
- **Other**: DISTINCT over many columns, nested CTEs (4 levels)
- Uncomment existing TPC-H and TPC-DS full-suite logical plan benchmarks
These complement the existing simple-plan benchmarks (2-6 node plans) by
covering the optimizer's behavior as plan complexity grows — useful for
tracking optimizer performance improvements (ref #15045).
## Test plan
- [x] `cargo bench --bench sql_planner` runs successfully with all new
benchmarks
- [x] Verified no overlap with existing benchmarks in
`sql_planner_extended.rs` or `optimizer/benches/`
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