Enable page-level payload I/O in hybrid scan - #23362
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Preserve page locations and variable-width offset state needed to safely reconstruct columns from a sparse subset of Parquet data pages.
Refine page topology preprocessing and add pruned-page decoding with hybrid scan coverage.
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Initialize sparse page state and carry variable-width offsets across pruned pages so page-level reads produce valid columns without overestimating string storage.
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Exercise source-grouped sparse payload reads and make dataset selection configurable for validated A/B benchmarks.
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Part of #23362 This PR includes bug fixes and supporting features needed to enable page pruning with page-level (sparse) I/O (for payload columns) in hybrid scan, that is upcoming in #23375 and includes end to end tests. Authors: - Muhammad Haseeb (https://github.com/mhaseeb123) Approvers: - Paul Mattione (https://github.com/pmattione-nvidia) - Vukasin Milovanovic (https://github.com/vuule) - Bradley Dice (https://github.com/bdice) - Nghia Truong (https://github.com/ttnghia) URL: #23374
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Contributes to #23519 This PR adds new hybrid scan APIs to support page-level (sparse) I/O for payload columns. This includes: - API to compute (pruned) page-level I/O byte range for payload columns - API to only materialize these sparse pages into the output table - End-to-end test coverage and some negative tests. More extensive tests will land in #23362 Authors: - Muhammad Haseeb (https://github.com/mhaseeb123) Approvers: - Vyas Ramasubramani (https://github.com/vyasr) - Qi Chen (https://github.com/qbacpey) URL: #23375
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Description
Closes #23519
This PR adds a feature complete prototype implementation of page-level IO support for payload columns in the Hybrid Scan reader along with an example showcasing its application.
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