Function diesel::pg::expression::functions::array_dims

pub fn array_dims<Arr: ArrayOrNullableArray + SingleValue, arr>(
    arr: arr,
) -> array_dims<Arr, arr>
where
    arr: AsExpression<Arr>,

Available on crate feature postgres_backend only.

Returns a text representation of the array’s dimensions

Example

let dims = diesel::select(array_dims::<Array<Integer>,_>(vec![1,2]))
    .get_result::<String>(connection)?;
assert!(String::from("[1:2]").eq(&dims));

let dims = diesel::select(array_dims::<Array<Nullable<Integer>>,_>(vec![None::<i32>,Some(2)]))
    .get_result::<String>(connection)?;
assert!(String::from("[1:2]").eq(&dims));

let dims = diesel::select(array_dims::<Array<Nullable<Integer>>,_>(vec![None::<i32>]))
    .get_result::<String>(connection)?;
assert!(String::from("[1:1]").eq(&dims));