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ArrayAndStats

vortex_compressor::stats

Struct ArrayAndStats 

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pub struct ArrayAndStats { /* private fields */ }
Expand description

An array bundled with its lazily-computed statistics cache.

The cache is guaranteed to correspond to the array. When a scheme creates a derived array (e.g. FoR bias subtraction), it must create a new ArrayAndStats so that stale stats from the original array are not reused.

Built-in stats are accessed via typed methods (integer_stats, float_stats, string_stats) which generate stats lazily on first access using the stored GenerateStatsOptions.

Extension schemes can use get_or_insert_with for custom stats types.

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impl ArrayAndStats

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pub fn new(array: ArrayRef, opts: GenerateStatsOptions) -> Self

Creates a new bundle with the given stats generation options.

Stats are generated lazily on first access via the typed accessor methods.

§Panics

Panics if the array is not canonical.

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pub fn array(&self) -> &ArrayRef

Returns a reference to the array.

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pub fn array_as_primitive(&self) -> PrimitiveArray

Returns the array as a PrimitiveArray.

§Panics

Panics if the array is not a primitive array.

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pub fn array_as_utf8(&self) -> VarBinViewArray

Returns the array as a VarBinViewArray.

§Panics

Panics if the array is not a UTF-8 string array.

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pub fn into_array(self) -> ArrayRef

Consumes the bundle and returns the array.

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pub fn array_len(&self) -> usize

Returns the length of the array.

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pub fn bool_stats(&mut self) -> &BoolStats

Returns bool stats, generating them lazily on first access.

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pub fn integer_stats(&mut self) -> &IntegerStats

Returns integer stats, generating them lazily on first access.

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pub fn float_stats(&mut self) -> &FloatStats

Returns float stats, generating them lazily on first access.

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pub fn string_stats(&mut self) -> &StringStats

Returns string stats, generating them lazily on first access.

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pub fn get_or_insert_with<T: 'static>(&mut self, f: impl FnOnce() -> T) -> &T

For extension schemes with custom stats types.

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