Struct ZeroOrMore 

pub struct ZeroOrMore;

The query can return no row, so .get() returns Option<R>.

Trait Implementations

impl Clone for ZeroOrMore

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ZeroOrMore

impl Debug for ZeroOrMore

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ZeroOrMore

fn default() -> Self

Returns the “default value” for a type.

impl RowCount for ZeroOrMore

type Get<R> = Option<R>

What .get() returns for rows of type R.

fn first<R>(row: Option<R>) -> Result<Option<R>, DrizzleError>

The first row of a result as Self::Get.