VarianceState

sql_cli::sql::aggregates

Struct VarianceState 

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pub struct VarianceState {
    pub sum: f64,
    pub sum_of_squares: f64,
    pub count: i64,
}
Expand description

State for VARIANCE/STDDEV aggregation

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§sum: f64§sum_of_squares: f64§count: i64

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impl VarianceState

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pub fn new() -> Self

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pub fn add(&mut self, value: &DataValue) -> Result<()>

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pub fn variance(&self) -> f64

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pub fn stddev(&self) -> f64

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pub fn finalize_variance(self) -> DataValue

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pub fn finalize_stddev(self) -> DataValue

Trait Implementations§

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impl Clone for VarianceState

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fn clone(&self) -> VarianceState

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for VarianceState

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for VarianceState

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fn default() -> Self

Returns the “default value” for a type. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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