Struct ColumnPredicateExpr 

pub struct ColumnPredicateExpr { /* private fields */ }

Implementations

impl ColumnPredicateExpr

pub fn new( column_name: PlSmallStr, dtype: DataType, source_arrow_dtype: ArrowDataType, expr: Arc<dyn PhysicalIoExpr>, specialized: Option<SpecializedColumnPredicate>, ) -> Self

Trait Implementations

impl Clone for ColumnPredicateExpr

fn clone(&self) -> ColumnPredicateExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ParquetColumnExpr for ColumnPredicateExpr

Available on crate feature parquet only.

fn try_evaluate_mut( &self, values: &dyn Array, bm: &mut BitmapBuilder, ) -> PolarsResult<()>

fn evaluate_null(&self) -> PolarsResult<bool>

The predicate result for a null value. This can fail, e.g. when the predicate casts the value after fill_null, so it should only be called if there is a null.

fn can_evaluate_null_slots(&self) -> bool

Whether the placeholder values under null rows can be evaluated with the results thrown away. This is not the case if evaluating them can have side effects or fail.

fn as_specialized(&self) -> Option<&SpecializedParquetColumnExpr>

fn evaluate(&self, values: &(dyn Array + 'static)) -> Bitmap

fn try_evaluate( &self, values: &(dyn Array + 'static), ) -> Result<Bitmap, PolarsError>

fn evaluate_mut(&self, values: &(dyn Array + 'static), bm: &mut BitmapBuilder)