Sunyue opened a new issue, #424:
URL: https://github.com/apache/arrow-go/issues/424
### Describe the enhancement requested
When trying to cast float16 array to float32/float64 using
`compute.CastToType()`, I am getting error `not implemented: function
'cast_float' has no kernel matching input types (float16)`. I tried a few other
types which are also not possible.
Is it feasible to support casting from float16 in function
`compute.CastToType()`? Thanks!
```go
import (
"testing"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/array"
"github.com/apache/arrow-go/v18/arrow/compute"
"github.com/apache/arrow-go/v18/arrow/float16"
"github.com/apache/arrow-go/v18/arrow/memory"
"github.com/stretchr/testify/require"
)
func Test_Types(t *testing.T) {
t.Parallel()
tt := []struct {
name string
to arrow.DataType
}{
{
name: "float32",
to: arrow.PrimitiveTypes.Float32,
},
{
name: "float64",
to: arrow.PrimitiveTypes.Float64,
},
}
for _, tc := range tt {
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
ctx := t.Context()
rq := require.New(t)
builder :=
array.NewFloat16Builder(memory.DefaultAllocator)
defer builder.Release()
builder.AppendValues([]float16.Num{float16.New(1.1),
float16.New(2.2), float16.New(3.3)}, nil)
arr := builder.NewArray()
defer arr.Release()
_, err := compute.CastToType(ctx, arr, tc.to)
rq.NoError(err, "failed to cast from float16 to %q",
tc.to.Name())
})
}
}
```
### Component(s)
Other
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