Align PandasCursor with PolarsCursor and optimize DataFrame operations#639

Merged

laughingman7743 merged 8 commits intomasterfrom

feature/pandas-cursor-alignment

Jan 4, 2026

Commits on Jan 4, 2026

Align PandasCursor chunk processing with PolarsCursor implementation

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Fix DataFrameIterator.iterrows() to maintain continuous row indices

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Rename DataFrameIterator to PandasDataFrameIterator and PolarsDataFrameIterator

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Optimize DataFrame operations for better performance

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Fix column names cache initialization order for unload queries

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Remove unused _closed flag from PolarsDataFrameIterator

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Add PolarsDataFrameIterator documentation to polars.rst

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Add Polars to extra packages table in README

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