Enum Selector 

#[non_exhaustive]
pub enum Selector {
    SingleUse(Box<TransactionOptions>),
    Id(Bytes),
    Begin(Box<TransactionOptions>),
}

If no fields are set, the default is a single use transaction with strong concurrency.

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.

SingleUse(Box<TransactionOptions>)

Execute the read or SQL query in a temporary transaction. This is the most efficient way to execute a transaction that consists of a single SQL query.

Id(Bytes)

Execute the read or SQL query in a previously-started transaction.

Begin(Box<TransactionOptions>)

Begin a new transaction and execute this read or SQL query in it. The transaction ID of the new transaction is returned in ResultSetMetadata.transaction, which is a Transaction.

Implementations

impl Selector

pub fn from_single_use(value: impl Into<Box<TransactionOptions>>) -> Self

Initializes the enum to the SingleUse branch.

pub fn from_id(value: impl Into<Bytes>) -> Self

Initializes the enum to the Id branch.

pub fn from_begin(value: impl Into<Box<TransactionOptions>>) -> Self

Initializes the enum to the Begin branch.

Trait Implementations

impl Clone for Selector

fn clone(&self) -> Selector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Selector

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

Formats the value using the given formatter.

impl PartialEq for Selector

fn eq(&self, other: &Selector) -> 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 StructuralPartialEq for Selector