Enum ZeroColumnCountDisposition 

pub enum ZeroColumnCountDisposition {
    NotRequired,
    Rejected,
    Represented,
}

Disposition of metadata-only row-count sources.

Variants

NotRequired

The plan reads at least one source column, so zero-column count is unused.

Rejected

The plan required zero-column count, but it was not proven safe.

Represented

The source represents row counts without reading physical columns.

Implementations

impl ZeroColumnCountDisposition

pub const fn as_str(self) -> &'static str

Stable lower-case code used by reports.

Trait Implementations

impl Clone for ZeroColumnCountDisposition

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 ZeroColumnCountDisposition

impl Debug for ZeroColumnCountDisposition

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

Formats the value using the given formatter.

impl Eq for ZeroColumnCountDisposition

impl Hash for ZeroColumnCountDisposition

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ZeroColumnCountDisposition

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ZeroColumnCountDisposition