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Support decoding Union column into DenseUnion #28

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Jefffrey opened this issue Apr 1, 2024 · 0 comments
Open

Support decoding Union column into DenseUnion #28

Jefffrey opened this issue Apr 1, 2024 · 0 comments
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enhancement New feature or request low Low priority

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@Jefffrey
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Jefffrey commented Apr 1, 2024

Initial Union support will decode to Sparse Union: datafusion-contrib/datafusion-orc@ee69b91

Can try give option to prefer decoding to DenseUnion: https://arrow.apache.org/docs/format/Columnar.html#dense-union

  • Since ORC already encodes data in a dense manner (omitting nulls in the data streams) so might be more efficient? Unknown, just something to keep in mind
@Jefffrey Jefffrey added enhancement New feature or request low Low priority labels Apr 1, 2024
@waynexia waynexia transferred this issue from datafusion-contrib/datafusion-orc Oct 30, 2024
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@Jefffrey