feat: cast expression

[danking]

Without this, it is impossible to compare two columns with different bit-widths.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.02%. Comparing base (1aac9ca) to head (efa3e8c).
⚠️ Report is 16 commits behind head on develop.

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[codspeed-hq]

CodSpeed Performance Report

Merging #5389 will degrade performances by 11.37%

_{Comparing dk/pyexpr-cast (efa3e8c) with develop (e269163)¹}

Summary

❌ 16 regressions
✅ 1405 untouched
🆕 7 new
⏩ 652 skipped²
🗄️ 28 archived benchmarks run³

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	decode_primitives[f32, (1000, 128)]	22.6 µs	25.5 µs	-11.28%
❌	decode_primitives[f32, (1000, 2)]	22.4 µs	25.3 µs	-11.35%
❌	decode_primitives[f32, (1000, 32)]	22.6 µs	25.4 µs	-11.29%
❌	decode_primitives[f32, (1000, 4)]	22.4 µs	25.3 µs	-11.37%
❌	decode_primitives[f32, (1000, 512)]	23.9 µs	26.7 µs	-10.74%
❌	decode_primitives[f32, (1000, 8)]	22.5 µs	25.3 µs	-11.34%
❌	decode_primitives[i64, (1000, 128)]	25.4 µs	28.4 µs	-10.34%
❌	decode_primitives[i64, (1000, 2)]	25.1 µs	28.1 µs	-10.54%
❌	decode_primitives[i64, (1000, 32)]	25.5 µs	28.5 µs	-10.38%
❌	decode_primitives[i64, (1000, 4)]	24.9 µs	27.8 µs	-10.52%
❌	decode_primitives[i64, (1000, 8)]	24.7 µs	27.6 µs	-10.61%
❌	decode_primitives[u8, (1000, 128)]	23.3 µs	26.2 µs	-10.86%
❌	decode_primitives[u8, (1000, 32)]	23.2 µs	26 µs	-10.91%
❌	decode_primitives[u8, (1000, 4)]	23.2 µs	26 µs	-10.91%
❌	decode_primitives[u8, (1000, 512)]	23.3 µs	26.1 µs	-10.87%
❌	decode_primitives[u8, (1000, 8)]	23.2 µs	26 µs	-10.91%
🆕	decompress[("alp_for_bp_f64", 0x4633420)]	N/A	24.2 ms	N/A
🆕	decompress[("datetime_for_bp", 0x46362e0)]	N/A	34.9 ms	N/A
🆕	decompress[("dict_fsst_varbin_bp_string", 0x4635620)]	N/A	14.5 ms	N/A
🆕	decompress[("dict_fsst_varbin_string", 0x4635180)]	N/A	14.5 ms	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Footnotes

1. No successful run was found on develop (e1c8435) during the generation of this report, so e269163 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 652 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. ↩

3. 28 benchmarks were run, but are now archived. If they were deleted in another branch, consider rebasing to remove them from the report. Instead if they were added back, click here to restore them. ↩

[joseph-isaacs]

any reason we omit the types?

[danking]

@joseph-isaacs what do you mean? I think this is just the default printed form for any expression.