New CTable dictionary spec, nested columns and richer Arrow/Parquet interoperability#634

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FrancescAlted merged 40 commits into

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ctable-dict-spec

May 15, 2026

Commits on May 11, 2026

Initial version of CTable dictionary/categorical column type
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Add missing module
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Add nested dotted column access and where-expression support in CTable
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Add dotted nested column support and hierarchical _cols storage paths
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Add nested schema v2 metadata and preserve empty-root Arrow names through import/export
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Added logical nested selector plumbing so metadata mapping is actually usable across APIs
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Implement nested-field CTable pipeline with flattened storage, logical mapping, and roundtrip support
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Skip tests when PyArrow is not installed
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Commits on May 13, 2026

Commits on May 14, 2026