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SegmentMeta

spg_storage::segment

Struct SegmentMeta

pub struct SegmentMeta {
    pub num_rows: u64,
    pub num_pages: u32,
    pub page_size_bytes: u32,
    pub min_pk: u64,
    pub max_pk: u64,
    pub total_bytes: usize,
}

Expand description

Lightweight summary of a finished segment — what the catalog manifest (v5.3 work) records to find the segment on disk and what RowLocator::Cold (v5.1 work) carries inside the PB index. Generated by Segment::encode.

Fields§

§num_rows: u64§num_pages: u32§page_size_bytes: u32§min_pk: u64§max_pk: u64§total_bytes: usize

Length of the full serialised segment in bytes. Useful for preallocating the file or sanity-checking after write_all.

Trait Implementations§

impl Clone for SegmentMeta

fn clone(&self) -> SegmentMeta

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

impl Debug for SegmentMeta

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for SegmentMeta

impl RefUnwindSafe for SegmentMeta

impl Send for SegmentMeta

impl Sync for SegmentMeta

impl Unpin for SegmentMeta

impl UnsafeUnpin for SegmentMeta

impl UnwindSafe for SegmentMeta

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

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

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.

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

Performs the conversion.