pub struct ColumnOptions {
    pub preimage: bool,
    pub uniform: bool,
    pub ref_counted: bool,
    pub compression: CompressionType,
    pub btree_index: bool,
}
Expand description

Database column configuration.

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§preimage: bool

Indicates that the column value is the preimage of the key. This implies that a given value always has the same key. Enables some optimizations.

§uniform: bool

Indicates that the keys are at least 32 bytes and the first 32 bytes have uniform distribution. Allows for skipping additional key hashing.

§ref_counted: bool

Use reference counting for values. Reference operations are allowed for a column. The value is deleted when the counter reaches zero.

§compression: CompressionType

Compression to use for this column.

§btree_index: bool

Column is configured to use Btree storage. Btree columns allow for ordered key iteration and key retrieval, but are significantly less performant and require more disk space.

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Trait Implementations§

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impl Clone for ColumnOptions

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fn clone(&self) -> ColumnOptions

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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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 ColumnOptions

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fn default() -> ColumnOptions

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

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for ColumnOptions

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impl StructuralEq for ColumnOptions

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impl StructuralPartialEq for ColumnOptions

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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> 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> 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
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.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V