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Implement bound truncation in parquet writer #29164

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Implement bound truncation in parquet writer #29164

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6791d83
bytes: allow for pointers to all byte-sized types in io_placeholder
ballard26 Jan 7, 2026
81b6f4d
bytes: expose reverse fragment iterator in iobuf
ballard26 Jan 7, 2026
3abadda
bytes: implement reverse byte iterator for iobuf
ballard26 Jan 7, 2026
6262bca
bytes: fix case where the last rhs fragment is skipped during comparison
ballard26 Jan 7, 2026
b004a33
strings: add additional utils for utf-encoded byte sequences
ballard26 Jan 7, 2026
af2da8f
serde/parquet: use zero-copy for bound encoding
ballard26 Jan 7, 2026
6cccc78
test_utils: make bound checks more permissive in parquet_verifier
ballard26 Jan 7, 2026
96e9f3e
serde/parquet: add min/max value truncators for byte array types
ballard26 Jan 7, 2026
9ce1d1a
serde/parquet: integrate bound truncation into parquet writer
ballard26 Jan 7, 2026
c3837e1
serde/parquet/tests: increase size of generated byte array fields
ballard26 Jan 7, 2026
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2 changes: 1 addition & 1 deletion src/v/bytes/iobuf.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -197,7 +197,7 @@ std::strong_ordering iobuf::operator<=>(const iobuf& o) const {
rhs.remove_prefix(n);
if (rhs.empty()) {
rhs = other_next_view();
if (o_it == o.cend()) {
if (rhs.empty()) {
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@ballard26 ballard26 Jan 7, 2026

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I'll open up a separate PR to backport this fix to older RP versions.

break;
}
}
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4 changes: 4 additions & 0 deletions src/v/bytes/tests/iobuf_tests.cc
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Expand Up @@ -99,6 +99,10 @@ SEASTAR_THREAD_TEST_CASE(test_cmp_str_view) {
std::strong_ordering::equal, (multiple_frags.share(0, 3) <=> "cat"));
BOOST_CHECK_LT(iobuf::from(""), iobuf::from("cat"));
BOOST_CHECK_GT(iobuf::from("cat"), iobuf::from(""));
auto multi_frags = iobuf::from("ab");
multi_frags.append_fragments(iobuf::from("d"));
BOOST_CHECK_EQUAL(
true, (iobuf::from("abc") <=> multi_frags) == std::strong_ordering::less);
}

SEASTAR_THREAD_TEST_CASE(test_appended_data_is_retained) {
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