Enum ReadLevel 

#[repr(i32)]
pub enum ReadLevel {
    IndexAndWal = 0,
    IndexOnly = 1,
    IndexAndBoundedWal = 2,
}

ReadLevel specifies which data sources to read from during queries. This affects consistency vs performance tradeoffs.

Variants

IndexAndWal = 0

Read from both the index and the write-ahead log (default). Provides full consistency with all committed writes visible.

IndexOnly = 1

Read only from the index, skipping the write-ahead log. Provides eventual consistency - recent uncommitted writes may not be visible.

IndexAndBoundedWal = 2

Read from the index and up to a server-configured number of write-ahead log entries. Provides a consistent prefix of the WAL with bounded query latency: recently committed writes beyond the limit may not be visible.

Implementations

impl ReadLevel

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of ReadLevel.

pub fn from_i32(value: i32) -> Option<ReadLevel>

👎Deprecated:

Use the TryFrom<i32> implementation instead

Converts an i32 to a ReadLevel, or None if value is not a valid variant.

impl ReadLevel

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Self>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for ReadLevel

fn clone(&self) -> ReadLevel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReadLevel

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

Formats the value using the given formatter.

impl Default for ReadLevel

fn default() -> ReadLevel

Returns the “default value” for a type.

impl From<ReadLevel> for ReadLevel

fn from(value: ReadLevel) -> Self

Converts to this type from the input type.

impl From<ReadLevel> for ReadLevel

fn from(value: ReadLevel) -> Self

Converts to this type from the input type.

impl From<ReadLevel> for i32

fn from(value: ReadLevel) -> i32

Converts to this type from the input type.

impl Hash for ReadLevel

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ReadLevel

fn cmp(&self, other: &ReadLevel) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ReadLevel

fn eq(&self, other: &ReadLevel) -> 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 PartialOrd for ReadLevel

fn partial_cmp(&self, other: &ReadLevel) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<i32> for ReadLevel

type Error = UnknownEnumValue

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<ReadLevel, UnknownEnumValue>

Performs the conversion.

impl Copy for ReadLevel

impl Eq for ReadLevel

impl StructuralPartialEq for ReadLevel