Function mz_expr::relation::non_nullable_columns

source ยท 
pub fn non_nullable_columns(predicates: &[MirScalarExpr]) -> BTreeSet<usize>
Expand description

Augment non-nullability of columns, by observing either

  1. Predicates that explicitly test for null values, and
  2. Columns that if null would make a predicate be null.