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Incorrect n_buffers in FFI_ArrowArray #1959

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viirya opened this issue Jun 29, 2022 · 0 comments · Fixed by #1960
Closed

Incorrect n_buffers in FFI_ArrowArray #1959

viirya opened this issue Jun 29, 2022 · 0 comments · Fixed by #1960
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arrow Changes to the arrow crate bug

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viirya commented Jun 29, 2022 •
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Describe the bug
We count n_buffers for FFI_ArrowArray by looking at ArrayData regarding with its null_buffer, and buffers. However, for NullType array, n_buffers should be 0. But currently n_buffers is 1.

n_buffers should be based on the layout spec.

We found this bug when transferring a NullType array between Rust and Java. The ffi ArrowArray fails a check at Arrow Java.

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@viirya viirya added the bug label Jun 29, 2022
@viirya viirya mentioned this issue Jun 29, 2022
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@alamb alamb changed the title Incorrect n_buffers in FFI_ArrowArray Incorrect n_buffers in FFI_ArrowArray Jul 7, 2022
@alamb alamb added the arrow Changes to the arrow crate label Jul 7, 2022
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Calculate n_buffers in FFI_ArrowArray by data layout viirya/arrow-rs
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