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MvccCommitBatch

Struct MvccCommitBatch 

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pub struct MvccCommitBatch {
    pub commit_ts: u64,
    pub records: Vec<MvccLogRecord>,
}
Expand description

All the writes a single BEGIN CONCURRENT transaction produced at its commit. Encoded into one WAL frame body; replayed atomically (a torn batch drops the whole transaction).

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§commit_ts: u64§records: Vec<MvccLogRecord>

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impl MvccCommitBatch

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pub fn encode(&self) -> Result<Box<[u8; 4096]>>

Encodes self into a PAGE_SIZE byte buffer, zero-padded past the actual payload. The buffer is what Wal::append_frame writes as the frame body for page_num = MVCC_FRAME_MARKER.

Returns an error if the encoded size would exceed PAGE_SIZE (a single transaction wrote more than ~4 KB of row data). v0 callers see this as a SQLRiteError::General; multi-frame batch support is a separate slice.

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pub fn decode(body: &[u8]) -> Result<Self>

Decodes a batch from a frame body. Strict: bad magic, truncated stream, unknown tags, or trailing-byte mismatches surface as typed errors. The caller (the WAL replayer) drops any frame that fails to decode and continues with the rest of the log.

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impl Clone for MvccCommitBatch

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fn clone(&self) -> MvccCommitBatch

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 MvccCommitBatch

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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 PartialEq for MvccCommitBatch

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fn eq(&self, other: &MvccCommitBatch) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for MvccCommitBatch

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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<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> 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
where U: Into<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

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

Performs the conversion.