Function build_pruning_predicate

datafusion/pruning/src/pruning_predicate.rs:385–402

Build a pruning predicate from an optional predicate expression. If the predicate is None or the predicate cannot be converted to a pruning predicate, return None. If there is an error creating the pruning predicate it is recorded by incrementing the `predicate_creation_errors` counter.

(
    predicate: Arc<dyn PhysicalExpr>,
    file_schema: &SchemaRef,
    predicate_creation_errors: &Count,
)

/// If there is an error creating the pruning predicate it is recorded by incrementing
/// the `predicate_creation_errors` counter.
pub fn build_pruning_predicate(
    predicate: Arc<dyn PhysicalExpr>,
    file_schema: &SchemaRef,
    predicate_creation_errors: &Count,
) -> Option<Arc<PruningPredicate>> {
    match PruningPredicate::try_new(predicate, Arc::clone(file_schema)) {
        Ok(pruning_predicate) => {
            if !pruning_predicate.always_true() {
                return Some(Arc::new(pruning_predicate));
            }
        }
        Err(e) => {
            debug!("Could not create pruning predicate for: {e}");
            predicate_creation_errors.add(1);
        }
    }
    None
}

/// Rewrites predicates that [`PredicateRewriter`] can not handle, e.g. certain
/// complex expressions or predicates that reference columns that are not in the