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MaskReduce

vortex_array::expr

Trait MaskReduce 

Source 
pub trait MaskReduce: VTable {
    // Required method
    fn mask(
        array: &Self::Array,
        mask: &ArrayRef,
    ) -> VortexResult<Option<ArrayRef>>;
}
Expand description

Mask an array without reading buffers.

This trait is for mask implementations that can operate purely on array metadata and structure without needing to read or execute on the underlying buffers. Implementations should return None if masking requires buffer access.

The mask parameter is a boolean array where true=keep/valid, false=null-out.

§Preconditions

The mask is guaranteed to have the same length as the array. Trivial cases (AllValid, AllInvalid, NonNullable) are handled by the caller before dispatch.

Required Methods§

Source

fn mask(array: &Self::Array, mask: &ArrayRef) -> VortexResult<Option<ArrayRef>>

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§