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Arrow IPC projection support #1338

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Dandandan opened this issue Feb 19, 2022 · 0 comments · Fixed by #1339
Closed

Arrow IPC projection support #1338

Dandandan opened this issue Feb 19, 2022 · 0 comments · Fixed by #1339
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enhancement Any new improvement worthy of a entry in the changelog

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@Dandandan
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Is your feature request related to a problem or challenge? Please describe what you are trying to do.
The FileReader currently doesn't support projection to skip reading/decoding certain columns.
This could be used by engines lole DataFusion to make the Arrow file reader more efficient.

Describe the solution you'd like
Support an optional Vec<usize> parameter to configure the column indexes in the reader.

Describe alternatives you've considered

Additional context
See support in arrow2
https://docs.rs/arrow2/latest/arrow2/io/ipc/read/struct.FileReader.html
@Dandandan Dandandan added the enhancement Any new improvement worthy of a entry in the changelog label Feb 19, 2022
@Dandandan Dandandan changed the title Arrow ipc FileReader projection support Arrow IPCFileReader projection support Feb 19, 2022
@Dandandan Dandandan changed the title Arrow IPCFileReader projection support Arrow IPC FileReader projection support Feb 19, 2022
@Dandandan Dandandan changed the title Arrow IPC FileReader projection support Arrow IPC projection support Feb 19, 2022
@Dandandan Dandandan mentioned this issue Feb 19, 2022
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enhancement Any new improvement worthy of a entry in the changelog
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Implement projection for arrow IPC Reader file / streams Dandandan/arrow-rs
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@Dandandan