pub struct Mean;Expand description
Compute the arithmetic mean of an array.
Implemented as Sum / Count via BinaryCombined.
Coercion / return type:
- Booleans and primitive numeric types are coerced to
f64and the result is a nullablef64. - Decimals are kept as decimals but not implemented currently
Implementations§
Trait Implementations§
Source§impl BinaryCombined for Mean
impl BinaryCombined for Mean
Source§fn id(&self) -> AggregateFnId
fn id(&self) -> AggregateFnId
Stable identifier for the combined aggregate.
Source§fn left_name(&self) -> &'static str
fn left_name(&self) -> &'static str
Field name for the left child in the partial struct dtype.
Source§fn right_name(&self) -> &'static str
fn right_name(&self) -> &'static str
Field name for the right child in the partial struct dtype.
Source§fn return_dtype(&self, input_dtype: &DType) -> Option<DType>
fn return_dtype(&self, input_dtype: &DType) -> Option<DType>
Return type of the combined aggregate.
Source§fn finalize(&self, sum: ArrayRef, count: ArrayRef) -> VortexResult<ArrayRef>
fn finalize(&self, sum: ArrayRef, count: ArrayRef) -> VortexResult<ArrayRef>
Combine the finalized left and right results into the final aggregate.
fn finalize_scalar( &self, left_scalar: Scalar, right_scalar: Scalar, ) -> VortexResult<Scalar>
Source§fn serialize(
&self,
_options: &CombinedOptions<Self>,
) -> VortexResult<Option<Vec<u8>>>
fn serialize( &self, _options: &CombinedOptions<Self>, ) -> VortexResult<Option<Vec<u8>>>
Serialize the options for this combined aggregate. Default: not serializable.
Source§fn coerce_args(
&self,
_options: &PairOptions<<Sum as AggregateFnVTable>::Options, <Count as AggregateFnVTable>::Options>,
input_dtype: &DType,
) -> VortexResult<DType>
fn coerce_args( &self, _options: &PairOptions<<Sum as AggregateFnVTable>::Options, <Count as AggregateFnVTable>::Options>, input_dtype: &DType, ) -> VortexResult<DType>
Coerce the input type. Default: chains
right.coerce_args(left.coerce_args(input)).Source§fn deserialize(
&self,
metadata: &[u8],
session: &VortexSession,
) -> VortexResult<CombinedOptions<Self>>
fn deserialize( &self, metadata: &[u8], session: &VortexSession, ) -> VortexResult<CombinedOptions<Self>>
Deserialize the options for this combined aggregate. Default: bails.
Auto Trait Implementations§
impl Freeze for Mean
impl RefUnwindSafe for Mean
impl Send for Mean
impl Sync for Mean
impl Unpin for Mean
impl UnsafeUnpin for Mean
impl UnwindSafe for Mean
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