Struct TableSpec

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pub struct TableSpec {
    pub n_keys: usize,
    pub n_vals: usize,
    pub uncacheable_columns: DenseIdMap<ColumnId, bool>,
    pub allows_delete: bool,
}

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§n_keys: usize

The number of key columns for the table.

§n_vals: usize

The number of non-key (i.e. value) columns in the table.

The total “arity” of the table is n_keys + n_vals.

§uncacheable_columns: DenseIdMap<ColumnId, bool>

Columns that cannot be cached across generations.

These columns should (e.g.) never have indexes built for them, as they will go out of date too quickly.

§allows_delete: bool

Whether or not deletions are supported for this table.

Tables where this value is false are allowed to panic on calls to stage_remove.

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impl TableSpec

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pub fn arity(&self) -> usize

The total number of columns stored by the table.

Trait Implementations§

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impl Clone for TableSpec

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fn clone(&self) -> TableSpec

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl UnwindSafe for TableSpec

Blanket 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<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> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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