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Posted to issues@arrow.apache.org by "andishgar (via GitHub)" <gi...@apache.org> on 2026/07/15 17:10:07 UTC
[I] [C++] RunEndEncodedBuilder does not merge consecutive NaN values [arrow]
andishgar opened a new issue, #50517:
URL: https://github.com/apache/arrow/issues/50517
### Describe the bug, including details regarding any error messages, version, and platform.
The following code:
```c++
auto ree_type = run_end_encoded(int32(), float32());
auto int32_builder = std::make_shared<Int32Builder>(pool_);
auto float_builder = std::make_shared<FloatBuilder>(pool_);
RunEndEncodedBuilder builder(pool_, int32_builder, float_builder, ree_type);
ASSERT_OK(builder.AppendScalar(**MakeScalar(float32(), std::nanf("0")), 3));
ASSERT_OK(builder.AppendScalar(**MakeScalar(float32(), std::nanf("0")), 3));
ASSERT_OK_AND_ASSIGN(auto array, builder.Finish());
ARROW_LOGGER_INFO("", array->ToString());
```
produces the following output. This indicates that consecutive NaN values are treated as distinct values instead of being merged into a single run:
```
-- run_ends:
[
3,
6
]
-- values:
[
nan,
nan
]
```
### Component(s)
C++
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Re: [I] [C++] RunEndEncodedBuilder does not merge consecutive NaN values [arrow]
Posted by "andishgar (via GitHub)" <gi...@apache.org>.
andishgar commented on issue #50517:
URL: https://github.com/apache/arrow/issues/50517#issuecomment-5002653916
@snoopuppy582, thanks for your interest and contribution. I was planning to work on this issue myself, so could you please consider picking up another issue instead? I appreciate your help.
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Re: [I] [C++] RunEndEncodedBuilder does not merge consecutive NaN values [arrow]
Posted by "snoopuppy582 (via GitHub)" <gi...@apache.org>.
snoopuppy582 commented on issue #50517:
URL: https://github.com/apache/arrow/issues/50517#issuecomment-5002353776
take
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Re: [I] [C++] RunEndEncodedBuilder does not merge consecutive NaN values [arrow]
Posted by "snoopuppy582 (via GitHub)" <gi...@apache.org>.
snoopuppy582 commented on issue #50517:
URL: https://github.com/apache/arrow/issues/50517#issuecomment-5002758695
Understood, thanks for letting me know. I'll step back and pick up another issue.
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