Struct PruningPredicate

pub struct PruningPredicate { /* private fields */ }

Implementations

impl PruningPredicate

pub fn try_new(original_expr: &ExprRef) -> Option<Self>

pub fn expr(&self) -> &ExprRef

pub fn required_stats(&self) -> &HashMap<FieldOrIdentity, HashSet<Stat>>

pub fn evaluate(&self, metadata: &ArrayData) -> VortexResult<Option<ArrayData>>

Evaluate this predicate against a per-chunk statistics table.

Returns Ok(None) if any of the required statistics are not present in metadata. If it returns Ok(Some(array)), the array is a boolean array with the same length as the metadata, and a true value means the chunk can be pruned.

Trait Implementations

impl Clone for PruningPredicate

fn clone(&self) -> PruningPredicate

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PruningPredicate

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

Formats the value using the given formatter.

impl Display for PruningPredicate

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

Formats the value using the given formatter.