Function evaluate_bounds

datafusion/expr/src/predicate_bounds.rs:49–59

Computes the output interval for the given boolean expression based on statically available information. # Arguments `predicate` - The boolean expression to analyze `is_null` - A callback function that provides additional nullability information for expressions. When called with an expression, it should return: - `Some(true)` if the expression is known to evaluate to NULL - `Some(false)` if the

(
    predicate: &Expr,
    certainly_null_expr: Option<&Expr>,
    input_schema: &dyn ExprSchema,
)

/// predicate can evaluate to.
///
pub(super) fn evaluate_bounds(
    predicate: &Expr,
    certainly_null_expr: Option<&Expr>,
    input_schema: &dyn ExprSchema,
) -> Result<NullableInterval> {
    let evaluator = PredicateBoundsEvaluator {
        input_schema,
        certainly_null_expr,
    };
    evaluator.evaluate_bounds(predicate)
}

struct PredicateBoundsEvaluator<'a> {
    input_schema: &'a dyn ExprSchema,