Move expression analysis and rewrite tooling into vortex-expr

[robert3005]

Summary

PR 5 of the stack that splits vortex-array into smaller crates.

Nothing in vortex-array calls vortex_array::expr::{analysis, forms}, the partition_bound* transforms or the replace transform. Their only users are scan planning in vortex-layout and one replace call in vortex-datafusion.

Changes

• These items move to a new vortex-expr crate:
  • vortex_expr::analysis: annotations, labeling, field-access analysis and referenced_field_paths. Its items are also re-exported at the crate root, as they were before.
  • vortex_expr::forms::conjuncts.
  • vortex_expr::transform: partition_bound, partition_bound_annotations, BoundPartitionedExpr and replace.
• find_between stays in vortex-array because BoundExpression::optimize uses it. The now-internal vortex_array::expr::transform module becomes private.
• One optimizer test used replace. It now builds the replaced expression directly.
• The umbrella crate's vortex::expr re-exports both vortex_array::expr and vortex_expr, so vortex::expr::transform::replace and friends keep their paths.

API Changes

vortex_array::expr::{analysis, forms, transform::*} and the analysis items re-exported at the root of vortex_array::expr move to vortex_expr. Paths through vortex::expr::… are unchanged.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Ps4mp7KF5c4p66aoSoXx5j

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[codspeed]

Merging this PR will regress 2 benchmarks

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️ 16 benchmarks spent significant time in system calls

System calls cannot be consistently instrumented, so they are not included in the measure, which understates the real cost. Please switch to the Walltime instrument to accurately measure system calls.

Measurement and system calls

• density_sweep_dense_runs[0.001]
• filter_powerlaw_by_mostly_true[250000]
• chunked_dict_primitive_into_canonical[f64, (1000, 1000, 10)]
• random_i128[0.01]
• density_sweep_dense_runs[0.9]
• optimize_lookup_predicate[ids=256, shape=in_list]
• bench_compare_sliced_dict_primitive[(3333, 10000)]
• decompress[u32, (1000, 256)]
• decompress[u16, (4000, 256)]
• from_vec_drop_vortex[65536]
• …and 6 more

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 6 improved benchmarks
❌ 2 regressed benchmarks
✅ 2168 untouched benchmarks
⏩ 37 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	threshold_neon[8]	2.8 µs	4.1 µs	-30.33%
❌	WallTime	take_u16_nullable_from_65536_avx512[1048576]	380.5 µs	450.5 µs	-15.55%
⚡	WallTime	filter_neon[8]	2.2 µs	1.1 µs	×2.1
⚡ ⚠️	Simulation	density_sweep_dense_runs[0.001]	46.8 µs	29.5 µs	+58.79%
⚡ ⚠️	Simulation	filter_powerlaw_by_mostly_true[250000]	144.6 µs	103.4 µs	+39.83%
⚡	WallTime	threshold_avx2[8]	2.3 µs	2 µs	+18.23%
⚡	Simulation	random_i8[0.01]	123.4 µs	108 µs	+14.26%
⚡	WallTime	filter_neon[80]	3.6 µs	3.2 µs	+11.83%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing rk/split-array-05-expr (276f15b) with rk/split-array-04-aggregates (33fb97e)}

Footnotes

1. 37 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[robert3005]

The CodSpeed Performance Analysis check is red. Its headline number swings with no relevant code change: earlier runs on this PR reported +12.99% and −9.77%, and this head shows "2 benchmarks regressed".

The two regressions it flags (density_sweep_dense_runs and filter_powerlaw_by_mostly_true) are filter kernels. This PR doesn't touch them; it only moves expression-analysis code, which those benchmarks never run. CodSpeed also warns that the runs it compared came from different runtime environments, so I'm treating this as runner noise and not changing code for it.

The earlier Rust (docs) failure (a broken intra-doc link) is fixed on the current head.

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