Trait tikv::storage::txn::commands::prewrite::PrewriteKind

trait PrewriteKind {
    type Mutation: MutationLock;
    fn txn_kind(&self) -> TransactionKind;

    fn can_skip_constraint_check(
        &mut self, 
        _mutations: &mut [Self::Mutation], 
        _snapshot: &impl Snapshot, 
        _context: &mut WriteContext<'_, impl LockManager>
    ) -> Result<()> { ... }
}

Encapsulates things which must be done differently for optimistic or pessimistic transactions.

Associated Types

type Mutation: MutationLock

The type of mutation and, optionally, its extra information, differing for the optimistic and pessimistic transaction.

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Required methods

fn txn_kind(&self) -> TransactionKind

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Provided methods

fn can_skip_constraint_check(
    &mut self,
    _mutations: &mut [Self::Mutation],
    _snapshot: &impl Snapshot,
    _context: &mut WriteContext<'_, impl LockManager>
) -> Result<()>

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Implementors

impl PrewriteKind for Optimistic

type Mutation = Mutation

fn txn_kind(&self) -> TransactionKind

fn can_skip_constraint_check(
    &mut self,
    mutations: &mut [Self::Mutation],
    snapshot: &impl Snapshot,
    context: &mut WriteContext<'_, impl LockManager>
) -> Result<()>

impl PrewriteKind for Pessimistic

type Mutation = (Mutation, bool)

fn txn_kind(&self) -> TransactionKind

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