Struct parity_db::ColumnOptions
source · [−]pub struct ColumnOptions {
pub preimage: bool,
pub uniform: bool,
pub ref_counted: bool,
pub compression: CompressionType,
pub compression_threshold: u32,
pub btree_index: bool,
}
Fields
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.
compression: CompressionType
Compression to use for this column.
compression_threshold: u32
Minimal value size threshold to attempt compressing a value.
btree_index: bool
Column is using a btree indexing.
Implementations
sourceimpl ColumnOptions
impl ColumnOptions
Trait Implementations
sourceimpl Clone for ColumnOptions
impl Clone for ColumnOptions
sourcefn clone(&self) -> ColumnOptions
fn clone(&self) -> ColumnOptions
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for ColumnOptions
impl Debug for ColumnOptions
sourceimpl Default for ColumnOptions
impl Default for ColumnOptions
sourcefn default() -> ColumnOptions
fn default() -> ColumnOptions
Returns the “default value” for a type. Read more
sourceimpl PartialEq<ColumnOptions> for ColumnOptions
impl PartialEq<ColumnOptions> for ColumnOptions
sourcefn eq(&self, other: &ColumnOptions) -> bool
fn eq(&self, other: &ColumnOptions) -> bool
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
sourcefn ne(&self, other: &ColumnOptions) -> bool
fn ne(&self, other: &ColumnOptions) -> bool
This method tests for !=
.
impl Eq for ColumnOptions
impl StructuralEq for ColumnOptions
impl StructuralPartialEq for ColumnOptions
Auto Trait Implementations
impl RefUnwindSafe for ColumnOptions
impl Send for ColumnOptions
impl Sync for ColumnOptions
impl Unpin for ColumnOptions
impl UnwindSafe for ColumnOptions
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more