Enum Shard

pub enum Shard {
    Direct(usize),
    All,
    Unknown,
    Blocked,
}

What shard, if any, the statement should be sent to.

Example

use pgdog_plugin::Shard;

// Send query to shard 2.
let direct = Shard::Direct(2);

// Send query to all shards.
let cross_shard = Shard::All;

// Let PgDog handle sharding.
let unknown = Shard::Unknown;

Variants

Direct(usize)

Direct-to-shard statement, sent to the specified shard only.

All

Send statement to all shards and let PgDog collect and transform the results.

Unknown

Not clear which shard it should go to, so let PgDog decide. Use this if you don’t want to handle sharding inside the plugin.

Blocked

The statement is blocked from executing.

Trait Implementations

impl Clone for Shard

fn clone(&self) -> Shard

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Shard

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

Formats the value using the given formatter.

impl From<Shard> for i64

fn from(value: Shard) -> Self

Converts to this type from the input type.

impl PartialEq for Shard

fn eq(&self, other: &Shard) -> 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 TryFrom<i64> for Shard

type Error = ()

The type returned in the event of a conversion error.

fn try_from(value: i64) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for Shard

impl Eq for Shard

impl StructuralPartialEq for Shard