Function least 

pub fn least<'a, V, L, R>(
    left: L,
    right: R,
) -> SQLExpr<'a, V, L::SQLType, <L::Nullable as NullAnd<R::Nullable>>::Output, <L::Aggregate as AggOr<R::Aggregate>>::Output>
where
    V: SQLParam + 'a,
    V::DialectMarker: PostgresNullSupport,
    L: Expr<'a, V>,
    R: Expr<'a, V>,
    L::SQLType: Compatible<R::SQLType>,
    L::Nullable: NullAnd<R::Nullable>,
    R::Nullable: Nullability,
    L::Aggregate: AggOr<R::Aggregate>,
    R::Aggregate: AggregateKind,

LEAST - returns the smallest of the given values (PostgreSQL).

Both arguments must have compatible types. PostgreSQL ignores NULL inputs, so LEAST(1, NULL) returns 1. The result is only NULL when all inputs are NULL.

Example

use drizzle_core::expr::least;

// Cap at maximum of 100
let score = least(users.score, 100);