Enum NaryRelationError 

pub enum NaryRelationError {
    EmptySchema,
    BlankColumnName {
        index: usize,
    },
    DuplicateColumn {
        column: String,
    },
    RowArityMismatch {
        expected: usize,
        actual: usize,
    },
    UnknownColumn {
        column: String,
    },
    MissingColumn {
        column: String,
    },
    UnexpectedColumn {
        column: String,
    },
    SchemaMismatch {
        left: Vec<String>,
        right: Vec<String>,
    },
}

Errors returned by n-ary relation validation and schema-aware operations. Errors returned by schema-aware n-ary relation operations.

Variants

EmptySchema

The provided schema has no columns.

BlankColumnName

A column name is blank or only whitespace.

Fields

index: usize

The zero-based schema position with the blank name.

DuplicateColumn

A column name is repeated where uniqueness is required.

Fields

column: String

The repeated column name.

RowArityMismatch

A row does not match the relation arity.

Fields

expected: usize

The schema arity expected by the relation.

actual: usize

The number of values that actually appeared in the row.

UnknownColumn

An operation referenced a column that is not present in the schema.

Fields

column: String

The missing column name.

MissingColumn

A named-row input omitted a column required by the schema.

Fields

column: String

The missing column name.

UnexpectedColumn

A named-row input provided a column that is not in the schema.

Fields

column: String

The unexpected column name.

SchemaMismatch

An operation requires identical schemas but received different ones.

Fields

left: Vec<String>

The left-hand schema.

right: Vec<String>

The right-hand schema.

Trait Implementations

impl Clone for NaryRelationError

fn clone(&self) -> NaryRelationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NaryRelationError

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

Formats the value using the given formatter.

impl Display for NaryRelationError

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

Formats the value using the given formatter.

impl Error for NaryRelationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for NaryRelationError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for NaryRelationError

impl StructuralPartialEq for NaryRelationError