Struct KernelPredicateEvaluatorDefaults 

pub struct KernelPredicateEvaluatorDefaults;

A collection of provided methods from the KernelPredicateEvaluator trait, factored out to allow reuse by multiple bool-output predicate evaluator implementations.

Implementations

impl KernelPredicateEvaluatorDefaults

pub fn eval_pred_scalar(val: &Scalar, inverted: bool) -> Option<bool>

Directly evaluates a boolean scalar. See KernelPredicateEvaluator::eval_pred_scalar.

pub fn eval_pred_scalar_is_null(val: &Scalar, inverted: bool) -> Option<bool>

Directly null-tests a scalar. See KernelPredicateEvaluator::eval_pred_scalar_is_null.

pub fn partial_cmp_scalars( ord: Ordering, a: &Scalar, b: &Scalar, inverted: bool, ) -> Option<bool>

A (possibly inverted) partial comparison of two scalars using SQL/logical semantics.

Returns None if the scalars are incomparable (different types, NULL values, or unsupported types like Struct/Array/Map).

NOTE: This implements SQL NULL semantics where NULL is incomparable to everything, including itself. For physical/structural comparison of query plans, use == on Scalar directly (which provides physical equality).

pub fn eval_pred_binary_scalars( op: BinaryPredicateOp, left: &Scalar, right: &Scalar, inverted: bool, ) -> Option<bool>

Directly evaluates a boolean comparison. See KernelPredicateEvaluator::eval_pred_binary_scalars.

pub fn finish_eval_pred_junction( op: JunctionPredicateOp, preds: &mut dyn Iterator<Item = Option<bool>>, inverted: bool, ) -> Option<bool>

Finishes evaluating a (possibly inverted) junction operation. See KernelPredicateEvaluator::finish_eval_pred_junction.

The inputs were already inverted by the caller, if needed.

With AND (OR), any FALSE (TRUE) input dominates, forcing a FALSE (TRUE) output. If there was no dominating input, then any NULL input forces NULL output. Otherwise, return the non-dominant value. Inverting the operation also inverts the dominant value.