[python] Defer BLOB payload reads until after filtering#8808
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XiaoHongbo-Hope wants to merge 3 commits into
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[python] Defer BLOB payload reads until after filtering#8808XiaoHongbo-Hope wants to merge 3 commits into
XiaoHongbo-Hope wants to merge 3 commits into
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Purpose
Filtered data-evolution scans previously materialized projected BLOB payloads before applying residual filters and limits. This made filtered-out rows still incur payload I/O.
Read eligible BLOB fields as descriptors through merge, filter and limit, then materialize only surviving rows. Predicates referencing the BLOB field keep the eager path.
read.defer-blob-resolve=falserestores the previous behavior.Tests
deferred_blob_resolve_test.pydata_evolution_deletion_vector_test.pytest_limit_pushdown.pyDedicatedFormatWriterTest#test_update_blob_columnDedicatedFormatWriterTest#test_array_blob_column_write_read_and_updateDedicatedFormatWriterTest#test_map_blob_column_write_read_and_update