zeroshade opened a new issue, #1471:
URL: https://github.com/apache/arrow-go/issues/1471
### Describe the bug
`GetReferencedValue` resolves a `StructFieldRef` on an array with
`v.Value.Children()[r.Field]`. That uses the child data as stored, without
applying the parent struct array's offset and length. When the struct column
comes from a sliced record batch or array, a nested field reference returns the
wrong length and the wrong values.
### To reproduce
Schema `s: struct<a: int32>` with rows `[{"s": {"a": 1}}, {"s": null}, {"s":
{"a": 3}}, {"s": {"a": 4}}]`. Evaluate the field reference `s.a` with
`exprs.ExecuteScalarExpression`:
- On the full record: `[1 null 3 4]` (correct).
- On `rec.NewSlice(2, 4)`: `[1 null 3 4]`. Expected `[3 4]`.
### Expected behavior
The referenced child should be sliced to the parent's offset and length, as
`array.Struct.Field` does (`NewSliceData(child, offset, offset+len)`).
### Component(s)
Go, Compute (`arrow/compute/exprs`)
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