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Add support for categorical type #693

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Merged
merged 3 commits into from
May 7, 2024
Merged

Add support for categorical type #693

merged 3 commits into from
May 7, 2024

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sungwy
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@sungwy sungwy commented May 2, 2024

Fixes: #450

DictionaryType is a separate type in Arrow, but isn't in Parquet.

Similar to how Arrow handles Dictionary Types, we will simply infer the Iceberg Type from the value_type of the provided DictionaryType field.

@sungwy sungwy requested a review from Fokko May 2, 2024 15:24
HonahX
HonahX reviewed May 7, 2024
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Overall LGTM! Thanks @syun64. Just have one general question: Shall we throw a warning that we will not convert the field back to dictionary type when reading?

HonahX
HonahX approved these changes May 7, 2024
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Thanks for adding the warning!

Fokko
Fokko approved these changes May 7, 2024
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@syun64 Looking good 👍

@Fokko Fokko merged commit 0508667 into apache:main May 7, 2024
@sungwy sungwy deleted the categoricals branch May 7, 2024 21:46
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@Fokko Fokko Fokko approved these changes

@HonahX HonahX HonahX approved these changes

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Add support for Categoricals as a data type in the writer
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@sungwy @Fokko @HonahX