andygrove commented on code in PR #716:
URL: https://github.com/apache/datafusion-comet/pull/716#discussion_r1690189625
##########
native/spark-expr/src/cast.rs:
##########
@@ -502,158 +502,163 @@ impl Cast {
eval_mode,
}
}
+}
- fn cast_array(&self, array: ArrayRef) -> DataFusionResult<ArrayRef> {
- let to_type = &self.data_type;
- let array = array_with_timezone(array, self.timezone.clone(),
Some(to_type))?;
- let from_type = array.data_type().clone();
- let array = match &from_type {
- DataType::Dictionary(key_type, value_type)
- if key_type.as_ref() == &DataType::Int32
- && (value_type.as_ref() == &DataType::Utf8
- || value_type.as_ref() == &DataType::LargeUtf8) =>
- {
- let dict_array = array
- .as_any()
- .downcast_ref::<DictionaryArray<Int32Type>>()
- .expect("Expected a dictionary array");
-
- let casted_dictionary = DictionaryArray::<Int32Type>::new(
- dict_array.keys().clone(),
- self.cast_array(dict_array.values().clone())?,
- );
-
- let casted_result = match to_type {
- DataType::Dictionary(_, _) =>
Arc::new(casted_dictionary.clone()),
- _ => take(casted_dictionary.values().as_ref(),
dict_array.keys(), None)?,
- };
- return Ok(spark_cast(casted_result, &from_type, to_type));
- }
- _ => array,
- };
- let from_type = array.data_type();
-
- let cast_result = match (from_type, to_type) {
- (DataType::Utf8, DataType::Boolean) => {
- Self::spark_cast_utf8_to_boolean::<i32>(&array, self.eval_mode)
- }
- (DataType::LargeUtf8, DataType::Boolean) => {
- Self::spark_cast_utf8_to_boolean::<i64>(&array, self.eval_mode)
- }
- (DataType::Utf8, DataType::Timestamp(_, _)) => {
- Self::cast_string_to_timestamp(&array, to_type, self.eval_mode)
- }
- (DataType::Utf8, DataType::Date32) => {
- Self::cast_string_to_date(&array, to_type, self.eval_mode)
- }
- (DataType::Int64, DataType::Int32)
- | (DataType::Int64, DataType::Int16)
- | (DataType::Int64, DataType::Int8)
- | (DataType::Int32, DataType::Int16)
- | (DataType::Int32, DataType::Int8)
- | (DataType::Int16, DataType::Int8)
- if self.eval_mode != EvalMode::Try =>
- {
- Self::spark_cast_int_to_int(&array, self.eval_mode, from_type,
to_type)
- }
- (
- DataType::Utf8,
- DataType::Int8 | DataType::Int16 | DataType::Int32 |
DataType::Int64,
- ) => Self::cast_string_to_int::<i32>(to_type, &array,
self.eval_mode),
- (
- DataType::LargeUtf8,
- DataType::Int8 | DataType::Int16 | DataType::Int32 |
DataType::Int64,
- ) => Self::cast_string_to_int::<i64>(to_type, &array,
self.eval_mode),
- (DataType::Float64, DataType::Utf8) => {
- Self::spark_cast_float64_to_utf8::<i32>(&array, self.eval_mode)
- }
- (DataType::Float64, DataType::LargeUtf8) => {
- Self::spark_cast_float64_to_utf8::<i64>(&array, self.eval_mode)
- }
- (DataType::Float32, DataType::Utf8) => {
- Self::spark_cast_float32_to_utf8::<i32>(&array, self.eval_mode)
- }
- (DataType::Float32, DataType::LargeUtf8) => {
- Self::spark_cast_float32_to_utf8::<i64>(&array, self.eval_mode)
- }
- (DataType::Float32, DataType::Decimal128(precision, scale)) => {
- Self::cast_float32_to_decimal128(&array, *precision, *scale,
self.eval_mode)
- }
- (DataType::Float64, DataType::Decimal128(precision, scale)) => {
- Self::cast_float64_to_decimal128(&array, *precision, *scale,
self.eval_mode)
- }
- (DataType::Float32, DataType::Int8)
- | (DataType::Float32, DataType::Int16)
- | (DataType::Float32, DataType::Int32)
- | (DataType::Float32, DataType::Int64)
- | (DataType::Float64, DataType::Int8)
- | (DataType::Float64, DataType::Int16)
- | (DataType::Float64, DataType::Int32)
- | (DataType::Float64, DataType::Int64)
- | (DataType::Decimal128(_, _), DataType::Int8)
- | (DataType::Decimal128(_, _), DataType::Int16)
- | (DataType::Decimal128(_, _), DataType::Int32)
- | (DataType::Decimal128(_, _), DataType::Int64)
- if self.eval_mode != EvalMode::Try =>
- {
- Self::spark_cast_nonintegral_numeric_to_integral(
- &array,
- self.eval_mode,
- from_type,
- to_type,
- )
- }
- _ if Self::is_datafusion_spark_compatible(from_type, to_type) => {
- // use DataFusion cast only when we know that it is compatible
with Spark
- Ok(cast_with_options(&array, to_type, &CAST_OPTIONS)?)
- }
- _ => {
- // we should never reach this code because the Scala code
should be checking
- // for supported cast operations and falling back to Spark for
anything that
- // is not yet supported
- Err(SparkError::Internal(format!(
- "Native cast invoked for unsupported cast from
{from_type:?} to {to_type:?}"
- )))
- }
- };
- Ok(spark_cast(cast_result?, from_type, to_type))
+pub fn spark_cast_array(
Review Comment:
If we are making this public, we should add some documentation. I think
there is a clippy lint that we should turn on to make sure all pub items have
rustdocs.
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