westonpace commented on issue #35354:
URL: https://github.com/apache/arrow/issues/35354#issuecomment-1536892668
I can confirm this with a unit test. I suspect we are overflowing something
but I don't see any asan or ubsan violations so it'll take a bit more digging:
```
TEST(HashJoin, LargeString) {
LargeStringBuilder builder;
ASSERT_OK(builder.Reserve(1030));
for (int i = 0; i < 1030; i++) {
ASSERT_OK(builder.Append(std::to_string(i)));
}
ASSERT_OK_AND_ASSIGN(auto arr, builder.Finish());
ExecBatch batch({arr}, 1030);
std::vector<ExecBatch> batches = {batch};
Declaration left{"exec_batch_source", ExecBatchSourceNodeOptions(
schema({field("x",
large_utf8())}), batches)};
Declaration right{
"exec_batch_source",
ExecBatchSourceNodeOptions(schema({field("x", large_utf8())}),
batches)};
HashJoinNodeOptions join_opts(JoinType::RIGHT_ANTI, {"x"}, {"x"});
Declaration join{"hashjoin", {left, right}, join_opts};
ASSERT_OK_AND_ASSIGN(std::shared_ptr<Table> result,
DeclarationToTable(join));
std::cout << result->ToString() << std::endl;
}
```
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