Enum FirstRowError 

pub enum FirstRowError {
    RowsEmpty,
    TypeCheckFailed(TypeCheckError),
    DeserializationFailed(DeserializationError),
}

An error returned by QueryRowsResult::first_row.

Variants

RowsEmpty

The request response was of Rows type, but no rows were returned

TypeCheckFailed(TypeCheckError)

Type check failed

DeserializationFailed(DeserializationError)

Deserialization failed

Trait Implementations

impl Debug for FirstRowError

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

Formats the value using the given formatter.

impl Display for FirstRowError

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

Formats the value using the given formatter.

impl Error for FirstRowError

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 From<DeserializationError> for FirstRowError

fn from(source: DeserializationError) -> FirstRowError

Converts to this type from the input type.

impl From<TypeCheckError> for FirstRowError

fn from(source: TypeCheckError) -> FirstRowError

Converts to this type from the input type.