andygrove commented on code in PR #3491:
URL: https://github.com/apache/datafusion-comet/pull/3491#discussion_r2819793815
##########
native/spark-expr/src/conversion_funcs/cast.rs:
##########
@@ -1138,25 +1123,26 @@ fn cast_binary_formatter(value: &[u8]) -> String {
/// Determines if DataFusion supports the given cast in a way that is
/// compatible with Spark
fn is_datafusion_spark_compatible(from_type: &DataType, to_type: &DataType) ->
bool {
- if from_type == to_type {
- return true;
- }
- match from_type {
- DataType::Null => {
- matches!(to_type, DataType::List(_))
- }
- DataType::Boolean => matches!(
- to_type,
- DataType::Int8
- | DataType::Int16
- | DataType::Int32
- | DataType::Int64
- | DataType::Float32
- | DataType::Float64
- | DataType::Utf8
- ),
- DataType::Int8 | DataType::Int16 | DataType::Int32 | DataType::Int64
=> {
- matches!(
+ is_identity_cast(from_type, to_type)
Review Comment:
What is the reason for extracting `from_type == to_type` into a dedicated
function that is only called here?
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