Type Alias datafusion_expr::FuncMonotonicity

pub type FuncMonotonicity = Vec<Option<bool>>;

Monotonicity of the ScalarFunctionExpr with respect to its arguments. Each element of this vector corresponds to an argument and indicates whether the function’s behavior is monotonic, or non-monotonic/unknown for that argument, namely:

• None signifies unknown monotonicity or non-monotonicity.
• Some(true) indicates that the function is monotonically increasing w.r.t. the argument in question.
• Some(false) indicates that the function is monotonically decreasing w.r.t. the argument in question.

Aliased Type

struct FuncMonotonicity { /* private fields */ }