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LagLeadFunctionSpec

laminar_core::operator::lag_lead

Struct LagLeadFunctionSpec 

Source 
pub struct LagLeadFunctionSpec {
    pub function_type: AnalyticFunctionKind,
    pub source_column: String,
    pub offset: usize,
    pub default_value: Option<f64>,
    pub output_column: String,
}
Expand description

Specification for a single analytic function (LAG, LEAD, FIRST_VALUE, etc.).

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§function_type: AnalyticFunctionKind

The kind of analytic function.

§source_column: String

Source column to read values from.

§offset: usize

Offset: for LAG/LEAD = rows to look back/ahead; for NTH_VALUE = N.

§default_value: Option<f64>

Default value when no row is available (as f64 for simplicity).

§output_column: String

Output column name.

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impl Clone for LagLeadFunctionSpec

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fn clone(&self) -> LagLeadFunctionSpec

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

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

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

Formats the value using the given formatter. Read more

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