Enum ColumnResolutionReason 

pub enum ColumnResolutionReason {
    NotFound,
    Indeterminate,
    Ambiguous,
}

Why an output-column selector could not be resolved.

Variants

NotFound

The output shape is known and does not contain the requested column.

Indeterminate

An unresolved wildcard prevents the output position from being known.

Ambiguous

More than one output position matches the requested name.

Trait Implementations

impl Clone for ColumnResolutionReason

fn clone(&self) -> ColumnResolutionReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ColumnResolutionReason

impl Debug for ColumnResolutionReason

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnResolutionReason

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ColumnResolutionReason

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

Formats the value using the given formatter.

impl Eq for ColumnResolutionReason

impl PartialEq for ColumnResolutionReason

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ColumnResolutionReason

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ColumnResolutionReason