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Added cast to/from Null from/to every type #1066

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merged 1 commit into from Jun 10, 2022
Merged

Added cast to/from Null from/to every type #1066

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22 changes: 2 additions & 20 deletions src/compute/cast/mod.rs
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Expand Up @@ -79,16 +79,7 @@ pub fn can_cast_types(from_type: &DataType, to_type: &DataType) -> bool {
}

match (from_type, to_type) {
(
Null,
Boolean | Int8 | UInt8 | Int16 | UInt16 | Int32 | UInt32 | Float32 | Date32 | Time32(_)
| Int64 | UInt64 | Float64 | Date64 | List(_) | Dictionary(..),
)
| (
Boolean | Int8 | UInt8 | Int16 | UInt16 | Int32 | UInt32 | Float32 | Date32 | Time32(_)
| Int64 | UInt64 | Float64 | Date64 | List(_) | Dictionary(..),
Null,
) => true,
(Null, _) | (_, Null) => true,
(Struct(_), _) => false,
(_, Struct(_)) => false,
(List(list_from), List(list_to)) => {
Expand Down Expand Up @@ -379,16 +370,7 @@ pub fn cast(array: &dyn Array, to_type: &DataType, options: CastOptions) -> Resu

let as_options = options.with_wrapped(true);
match (from_type, to_type) {
(
Null,
Boolean | Int8 | UInt8 | Int16 | UInt16 | Int32 | UInt32 | Float32 | Date32 | Time32(_)
| Int64 | UInt64 | Float64 | Date64 | List(_) | Dictionary(..),
)
| (
Boolean | Int8 | UInt8 | Int16 | UInt16 | Int32 | UInt32 | Float32 | Date32 | Time32(_)
| Int64 | UInt64 | Float64 | Date64 | List(_) | Dictionary(..),
Null,
) => Ok(new_null_array(to_type.clone(), array.len())),
(Null, _) | (_, Null) => Ok(new_null_array(to_type.clone(), array.len())),
(Struct(_), _) => Err(Error::NotYetImplemented(
"Cannot cast from struct to other types".to_string(),
)),
Expand Down