Add get_column_usage utility function #516
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jonmmease
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Nov 16, 2024
* Add get_column_usage utility function * Add Python function for column usage
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Adds a
get_column_usageutility function for Rust and Python that compute the columns from the root datasets that are used by a Vega spec.I'm planning to remove the Python Datasource logic in favor of projecting down to the required columns and then using the Arrow PyCapsule API. This should be more efficient as it won't involve calling back into Python to load data.