feat: Native columnar to row conversion#3221

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andygrove wants to merge 33 commits intoapache:mainfrom

andygrove:native-c2r

Commits on Jan 19, 2026

feat: add experimental native columnar to row conversion

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cargo fmt
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cargo clippy
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docs
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update benchmark [skip ci]
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fix: use correct element sizes in native columnar to row for array/map

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test: add fuzz test with nested types to native C2R suite

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test: add deeply nested type tests to native C2R suite

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Commits on Jan 20, 2026

test: add fuzz test with generateNestedSchema for native C2R

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format
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fix: handle LargeList and improve error handling in native C2R

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fix
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fix: add Dictionary-encoded array support to native C2R

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format
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clippy [skip ci]
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test: add benchmark comparing JVM and native columnar to row conversion

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perf: optimize native C2R by eliminating Vec allocations for strings

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perf: add fixed-width fast path for native C2R

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test: add fixed-width-only benchmark and refactor C2R benchmark

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perf: optimize complex types in native C2R by eliminating intermediate allocations

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perf: add bulk copy optimization for primitive arrays in native C2R

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perf: add pre-downcast optimization for native C2R general path

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fix: correct array element bulk copy for Date32, Timestamp, Boolean

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perf: Velox-style optimization for array/map C2R (40-52% faster)

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perf: inline type dispatch for struct fields in native C2R

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perf: pre-downcast struct fields for native C2R

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perf: optimize general path for mixed fixed/variable-length columns

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revert
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upmerge
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revert doc format change
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fix: address clippy warnings and remove dead code in native C2R

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Remove #[inline] hint from bulk_copy_range

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fix
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feat: Native columnar to row conversion#3221

feat: Native columnar to row conversion#3221
andygrove wants to merge 33 commits intoapache:mainfrom
andygrove:native-c2r

Commits on Jan 19, 2026

feat: add experimental native columnar to row conversion

cargo fmt

cargo clippy

docs

update benchmark [skip ci]

fix: use correct element sizes in native columnar to row for array/map

test: add fuzz test with nested types to native C2R suite

test: add deeply nested type tests to native C2R suite

Commits on Jan 20, 2026

test: add fuzz test with generateNestedSchema for native C2R

format

fix: handle LargeList and improve error handling in native C2R

fix

fix: add Dictionary-encoded array support to native C2R

format

clippy [skip ci]

test: add benchmark comparing JVM and native columnar to row conversion

perf: optimize native C2R by eliminating Vec allocations for strings

perf: add fixed-width fast path for native C2R

test: add fixed-width-only benchmark and refactor C2R benchmark

perf: optimize complex types in native C2R by eliminating intermediate allocations

perf: add bulk copy optimization for primitive arrays in native C2R

perf: add pre-downcast optimization for native C2R general path

fix: correct array element bulk copy for Date32, Timestamp, Boolean

perf: Velox-style optimization for array/map C2R (40-52% faster)

perf: inline type dispatch for struct fields in native C2R

perf: pre-downcast struct fields for native C2R

perf: optimize general path for mixed fixed/variable-length columns

revert

upmerge

revert doc format change

fix: address clippy warnings and remove dead code in native C2R

Remove #[inline] hint from bulk_copy_range

fix