jrecuerda opened a new issue #11799:
URL: https://github.com/apache/arrow/issues/11799
I am not able to use the `hash_*` compute functions. I have tried both in
python and directly in C++ but I am always getting the following error:
```
Function hash_sum has no kernel matching input types (array[int64],
array[string])
```
I have tried multiple combinations of input types: float-int64,
float-string, double-string, double-int64...
These are two simplified examples of what I'm trying:
### Python
```
>>> import pyarrow.compute as pc
>>> pc.sum([1,2,3])
<pyarrow.Int64Scalar: 6>
>>> pc.hash_sum([1,2,3], ["a", "b", "a"])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/vscode/.local/lib/python3.6/site-packages/pyarrow/compute.py",
line 191, in wrapper
return func.call(args, options, memory_pool)
File "pyarrow/_compute.pyx", line 327, in pyarrow._compute.Function.call
File "pyarrow/error.pxi", line 143, in
pyarrow.lib.pyarrow_internal_check_status
File "pyarrow/error.pxi", line 120, in pyarrow.lib.check_status
pyarrow.lib.ArrowNotImplementedError: Function hash_sum has no kernel
matching input types (array[int64], array[string])
```
### C++
```
arrow::DoubleBuilder builder;
builder.Append(1);
builder.Append(2);
builder.Append(3);
auto array = builder.Finish();
arrow::StringBuilder builderStr;
builderStr.Append("a");
builderStr.Append("b");
builderStr.Append("a");
auto arrayKey = builderStr.Finish();
std::vector<std::shared_ptr<arrow::Field>> schema_vector = {
arrow::field("id", arrow::float64()), arrow::field("cat",
arrow::utf8())};
auto schema = std::make_shared<arrow::Schema>(schema_vector);
auto table = arrow::Table::Make(schema, {*array, *arrayKey});
auto res = arrow::compute::CallFunction(std::string("hash_count"),
{table->GetColumnByName("id"), table->GetColumnByName("cat")});
```
What am I missing?
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