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TransactionBuilder

Struct TransactionBuilder 

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pub struct TransactionBuilder {
    pub isolation: IsolationLevel,
    pub access: AccessMode,
    pub lock_resolution: LockResolution,
    pub lock_timeout: Option<i32>,
    pub no_auto_undo: bool,
    pub auto_commit: bool,
}
Expand description

Construtor (builder) para o Transaction Parameter Buffer.

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§isolation: IsolationLevel

Nível de isolamento usado ao iniciar a transação.

§access: AccessMode

Se a transação permite escrita ou apenas leitura.

§lock_resolution: LockResolution

O que fazer quando há conflito de bloqueio.

§lock_timeout: Option<i32>

Timeout de bloqueio (lock) em segundos (só faz sentido com LockResolution::Wait).

§no_auto_undo: bool

Desabilita o log de undo por instrução (mais rápido, sem savepoints).

§auto_commit: bool

Faz commit automático de cada instrução DML no lado do servidor.

Implementations§

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impl TransactionBuilder

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pub fn new() -> Self

Cria um builder com os padrões do driver: snapshot, leitura/escrita e wait.

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pub fn isolation(self, level: IsolationLevel) -> Self

Define o nível de isolamento.

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pub fn read_only(self) -> Self

Marca a transação como somente leitura.

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pub fn read_write(self) -> Self

Marca a transação como leitura e escrita.

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pub fn no_wait(self) -> Self

Faz conflitos de bloqueio falharem imediatamente.

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pub fn lock_timeout(self, seconds: i32) -> Self

Aguarda conflitos de bloqueio por até seconds segundos.

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pub fn build(&self) -> Vec<u8>

Serializa para um buffer de bytes TPB.

Trait Implementations§

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impl Clone for TransactionBuilder

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fn clone(&self) -> TransactionBuilder

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for TransactionBuilder

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

Formats the value using the given formatter. Read more
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impl Default for TransactionBuilder

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fn default() -> TransactionBuilder

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Read<Exclusive, BecauseExclusive> for T
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
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fn vzip(self) -> V