feat(fuzz): row-encoding fuzz target for vortex-row#8955
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Generates 1-3 same-length columns of arbitrary dtypes with per-column RowSortField configs and checks three properties: - computed row sizes match the encoded key lengths - byte comparison of whole-array keys equals a logical tuple comparison under an independent total-order oracle (IEEE-754 total order for floats, positional nulls, leaf-only descending inversion) - keys stay comparable across separately encoded chunks, including chunks recompressed by btrblocks to different physical layouts The cross-chunk property reproduces the decimal key-width bug fixed in #8937 within minutes when run against develop without that fix. Signed-off-by: Nemo Yu <zyu379@wisc.edu>
Signed-off-by: Nemo Yu <zyu379@wisc.edu>
Signed-off-by: Nemo Yu <zyu379@wisc.edu>
a10y
approved these changes
Jul 24, 2026
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Follow-up to #8937, where @a10y suggested a fuzz target for vortex-row.
What it does
Adds a
row_encodefuzz target that generates 1–3 same-length columns of arbitrary dtypes (via the existingArbitraryArraymachinery) with independent per-columnRowSortFieldconfigs (descending × nulls-first), and checks three properties:compute_row_sizes' per-row{fixed, var}totals equal the encoded key lengths.RowKey(recursive over structs/FSLs) and compares with the byte format's exact semantics, nulls positioned bynulls_firstregardless of direction, anddescendinginverting leaf values only.Unsupported dtypes (List, Variant, Union, Extension, Decimal256) assert that the encoder rejects them. The target is wired into the scheduled fuzz workflow like the existing targets.