Struct DynamicComparisonExpr

pub struct DynamicComparisonExpr { /* private fields */ }

A dynamic comparison expression can be used to capture a comparison to a value that can change during the execution of a query, such as when a compute engine pushes down an ORDER BY + LIMIT operation and is able to progressively tighten the bounds of the filter.

Implementations

impl DynamicComparisonExpr

pub fn new( rhs: ExprRef, operator: Operator, rhs_value: impl Fn() -> Option<ScalarValue> + Send + Sync + 'static, rhs_dtype: DType, default: bool, ) -> Self

pub fn scalar(&self) -> Option<Scalar>

Methods from Deref<Target = dyn VortexExpr>

pub fn id(&self) -> ExprId

pub fn is<V: VTable>(&self) -> bool

pub fn as_<V: VTable>(&self) -> &V::Expr

pub fn as_opt<V: VTable>(&self) -> Option<&V::Expr>

pub fn evaluate(&self, scope: &Scope) -> VortexResult<ArrayRef>

Compute result of expression on given batch producing a new batch

Trait Implementations

impl AnalysisExpr for DynamicComparisonExpr

fn stat_falsification(&self, catalog: &mut dyn StatsCatalog) -> Option<ExprRef>

An expression over zone-statistics which implies all records in the zone evaluate to false.

fn max(&self, _catalog: &mut dyn StatsCatalog) -> Option<ExprRef>

An expression for the upper non-null bound of this expression, if available.

fn min(&self, _catalog: &mut dyn StatsCatalog) -> Option<ExprRef>

An expression for the lower non-null bound of this expression, if available.

fn nan_count(&self, _catalog: &mut dyn StatsCatalog) -> Option<ExprRef>

An expression for the NaN count for a column, if available.

fn field_path(&self) -> Option<FieldPath>

impl AsRef<dyn VortexExpr> for DynamicComparisonExpr

fn as_ref(&self) -> &dyn VortexExpr

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for DynamicComparisonExpr

fn clone(&self) -> DynamicComparisonExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DynamicComparisonExpr

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

Formats the value using the given formatter.

impl Deref for DynamicComparisonExpr

type Target = dyn VortexExpr

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Display for DynamicComparisonExpr

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

Formats the value using the given formatter.

impl From<DynamicComparisonExpr> for ExprRef

fn from(value: DynamicComparisonExpr) -> ExprRef

Converts to this type from the input type.

impl Hash for DynamicComparisonExpr

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntoExpr for DynamicComparisonExpr

fn into_expr(self) -> ExprRef

Convert this type into an expression reference.

impl PartialEq for DynamicComparisonExpr

fn eq(&self, other: &Self) -> 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 Eq for DynamicComparisonExpr