Struct datafusion::physical_expr::analysis::AnalysisContext

pub struct AnalysisContext {
    pub boundaries: Vec<ExprBoundaries>,
    pub selectivity: Option<f64>,
}

The shared context used during the analysis of an expression. Includes the boundaries for all known columns.

Fields

boundaries: Vec<ExprBoundaries>

selectivity: Option<f64>

The estimated percentage of rows that this expression would select, if it were to be used as a boolean predicate on a filter. The value will be between 0.0 (selects nothing) and 1.0 (selects everything).

Implementations

impl AnalysisContext

pub fn new(boundaries: Vec<ExprBoundaries>) -> AnalysisContext

pub fn with_selectivity(self, selectivity: f64) -> AnalysisContext

pub fn try_from_statistics( input_schema: &Schema, statistics: &[ColumnStatistics], ) -> Result<AnalysisContext, DataFusionError>

Create a new analysis context from column statistics.

Trait Implementations

impl Clone for AnalysisContext

fn clone(&self) -> AnalysisContext

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AnalysisContext

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

Formats the value using the given formatter.

impl PartialEq for AnalysisContext

fn eq(&self, other: &AnalysisContext) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for AnalysisContext