Enum QueryError 

pub enum QueryError {
    MeasurementNotFound(String),
    FieldNotFound {
        measurement: String,
        field: String,
    },
    InvalidTimeRange {
        start: i64,
        end: i64,
    },
    Validation(String),
    Segment(SegmentError),
    Arrow(ArrowError),
    Index(IndexError),
    Io(Error),
    QueryMemoryExceeded {
        requested: usize,
        allocated: usize,
        budget: usize,
    },
}

Query engine errors.

Variants

MeasurementNotFound(String)

Measurement not found in the schema registry.

FieldNotFound

Field not found in the measurement schema.

Fields

measurement: String

Measurement name.

field: String

Field name that was not found.

InvalidTimeRange

Invalid time range (start > end).

Fields

start: i64

Start timestamp.

end: i64

End timestamp.

Validation(String)

Query validation error.

Segment(SegmentError)

Segment read error.

Arrow(ArrowError)

Arrow computation error.

Index(IndexError)

Index error.

Io(Error)

I/O error.

QueryMemoryExceeded

Per-query memory budget exceeded.

Returned when a query operator attempts to allocate more memory than the configured per-query budget allows. This prevents individual queries from causing OOM on the server.

Fields

requested: usize

Bytes requested in this allocation.

allocated: usize

Bytes already allocated by this query.

budget: usize

Total budget for this query.

Trait Implementations

impl Debug for QueryError

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

Formats the value using the given formatter.

impl Display for QueryError

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

Formats the value using the given formatter.

impl Error for QueryError

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<ArrowError> for QueryError

fn from(source: ArrowError) -> Self

Converts to this type from the input type.

impl From<Error> for QueryError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<IndexError> for QueryError

fn from(source: IndexError) -> Self

Converts to this type from the input type.

impl From<SegmentError> for QueryError

fn from(source: SegmentError) -> Self

Converts to this type from the input type.