Add support for automatic join column deduplication in DataFrame joins#1185

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kosiew wants to merge 18 commits intoapache:mainfrom

kosiew:column-1173

Commits on Jul 4, 2025

refactor: style loading logic in DataFrameHtmlFormatter
kosiew
committed

Commits on Jul 8, 2025

Add deduplicate option to DataFrame.join to drop duplicate join columns
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test: add deduplicate join selection tests for DataFrame
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test: add test for select after deduplicated join on DataFrame
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docs: enhance joins.rst with details on DataFrame naming and deduplication behavior
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feat: introduce JoinKeys dataclass for improved join key handling in DataFrame
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docs: enhance _prepare_deduplicate docstring with detailed parameter and return information
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feat: implement collision-safe temporary aliases for join column renaming in DataFrame
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fix: update sorting in test_join_deduplicate_multi to include multiple columns
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test: add deduplication tests for all join types in test_join_deduplicate_all_types
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test: enhance join deduplication tests with schema validation and individual column selection
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fix: improve error messages for join key validation in DataFrame
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feat: enhance join operation preparation with JoinPreparation class
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fix join deduplicate and tests
kosiew
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