Enum DataError 

#[non_exhaustive]
pub enum DataError {
    UnknownColumn(String),
    UnsupportedKey(String),
    UnsupportedColumn(String),
    LiteralMismatch(String),
    NotNumeric(String),
    WindowSpan(String),
    DuplicateName(String),
    ColumnCount {
        expected: usize,
        found: usize,
    },
    ColumnMismatch {
        column: usize,
    },
    NullKey {
        row: usize,
    },
    KeyType,
    TooManyRows,
    Arrow(String),
}

Why a table or view operation was refused. Nothing changes when one is returned.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnknownColumn(String)

No column has this name.

UnsupportedKey(String)

The key column must hold integers or strings.

UnsupportedColumn(String)

Views and groups cannot read this column’s data type (lists, structs, binary, …).

LiteralMismatch(String)

A filter’s value or operation does not fit this column’s type (text compared with a number, contains on a number).

NotNumeric(String)

Sums and means need an integer, decimal or float column; this one holds something else (text, booleans, dates, times).

WindowSpan(String)

A window’s span does not fit its column: a Duration goes with dates, times and timestamps, a number (zero or more) with integers, decimals and floats.

DuplicateName(String)

Two columns of a group spec’s result would have this name.

ColumnCount

The batch has a different number of columns.

Fields

expected: usize

Columns in the table.

found: usize

Columns in the batch.

ColumnMismatch

The batch’s column at this index has another name or data type.

Fields

column: usize

Index of the first differing column.

NullKey

A row of the batch has no key.

Fields

row: usize

The row, within the batch.

KeyType

Keys to delete or find are not of the key column’s kind (text for a number key).

TooManyRows

More than 2^32 live keys, or rows in one batch.

Arrow(String)

Arrow could not build a batch: compacting a table, or assembling groups.

Trait Implementations

impl Clone for DataError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataError

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

Formats the value using the given formatter.

impl Display for DataError

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

Formats the value using the given formatter.

impl Eq for DataError

impl Error for DataError

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 DataError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DataError