Function coerce_array

parquet/src/arrow/array_reader/primitive_array.rs:227–244

Coerce the parquet physical type array to the target type This should match the logic in schema::primitive::apply_hint

(array: ArrayRef, target_type: &ArrowType)

///
/// This should match the logic in schema::primitive::apply_hint
fn coerce_array(array: ArrayRef, target_type: &ArrowType) -> Result<ArrayRef> {
    if let ArrowType::Dictionary(key_type, value_type) = target_type {
        let dictionary = pack_dictionary(key_type, array.as_ref())?;
        let any_dictionary = dictionary.as_any_dictionary();

        let coerced_values =
            coerce_array(Arc::clone(any_dictionary.values()), value_type.as_ref())?;

        return Ok(any_dictionary.with_values(coerced_values));
    }

    match array.data_type() {
        ArrowType::Int32 => coerce_i32(array.as_primitive(), target_type),
        ArrowType::Int64 => coerce_i64(array.as_primitive(), target_type),
        ArrowType::Boolean | ArrowType::Float32 | ArrowType::Float64 => Ok(array),
        _ => unreachable!("Cannot coerce array of type {}", array.data_type()),
    }
}

fn coerce_i32(array: &Int32Array, target_type: &ArrowType) -> Result<ArrayRef> {
    Ok(match target_type {