Function bool_and 

pub fn bool_and<'a, V, E>(
    expr: E,
) -> SQLExpr<'a, V, <V::DialectMarker as DialectTypes>::Bool, Null, Agg>
where
    V: SQLParam + 'a,
    V::DialectMarker: PostgresAggregateSupport,
    E: Expr<'a, V>,
    E::SQLType: BooleanAggregatePolicy<V::DialectMarker>,

BOOL_AND - true if all non-null inputs are true (PostgreSQL).