Repository navigation
[C++][Dataset] Filtering dataset that has column with StringView type gives empty table as result #39637
Description
Describe the bug, including details regarding any error messages, version, and platform.
Not a C++ reproducer, but with very preliminary (non-merged) Python bindings to illustrate it:
import pyarrow as pa
import pyarrow.dataset as ds
# create IPC file with StringView column
builder = pa.lib.StringViewBuilder()
builder.append("test")
builder.append("some long string that is not inlined")
builder.append(None)
arr = builder.finish()
table = pa.table({"a": [1, 2, 3], "b": arr})
ds.write_dataset(table, "test_string_view", format="ipc")
# read back as a dataset
dataset = ds.dataset("test_string_view/", format="ipc")
The dataset looks good, and can be read as a whole:
>>> dataset.schema
a: int64
b: string_view
>>> dataset.to_table()
pyarrow.Table
a: int64
b: string_view
----
a: [[1,2,3]]
b: [["test","some long string that is not inlined",null]]
But when reading it with a filter on the other integer column, it silently gives an empty table (I would have expected it to raise an error because filter/take is not yet implemented for string_view):
>>> dataset.to_table(filter=ds.field('a') > 1)
pyarrow.Table
a: int64
b: string_view
----
a: [[]]
b: [[]]
This doesn't seem to happen if the string array only has inlined strings (then I get the expected error).
Component(s)
C++
Activity
thisisnic commentedon Nov 10, 2026
I'm just going through older bug issues to see if we can close them out or we need further action.
Could not reproduce on 26.0.1: the filter now raises
ArrowNotImplementedError: Function 'array_filter' has no kernel matching input types (string_view, bool)instead of returning an empty table. The change is in 24.0.0 and later.