pub enum FactorizerVariable {
Id(GlobalId),
Index(usize),
Unknown,
}
Expand description
The variables used in symbolic expressions representing cardinality
Variants§
Id(GlobalId)
The total cardinality of a given global id
Index(usize)
The inverse of the number of distinct keys in the index held in the given column, i.e., 1/|# of distinct keys|
TODO(mgree): need to correlate this back to a given global table, to feed in statistics (or have a sub-attribute for collecting this)
Unknown
An unbound local or other unknown quantity
Trait Implementations§
source§impl Clone for FactorizerVariable
impl Clone for FactorizerVariable
source§fn clone(&self) -> FactorizerVariable
fn clone(&self) -> FactorizerVariable
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for FactorizerVariable
impl Debug for FactorizerVariable
source§impl Ord for FactorizerVariable
impl Ord for FactorizerVariable
source§fn cmp(&self, other: &FactorizerVariable) -> Ordering
fn cmp(&self, other: &FactorizerVariable) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the maximum of two values. Read more
source§impl PartialEq for FactorizerVariable
impl PartialEq for FactorizerVariable
source§fn eq(&self, other: &FactorizerVariable) -> bool
fn eq(&self, other: &FactorizerVariable) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for FactorizerVariable
impl PartialOrd for FactorizerVariable
source§fn partial_cmp(&self, other: &FactorizerVariable) -> Option<Ordering>
fn partial_cmp(&self, other: &FactorizerVariable) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read moreimpl Copy for FactorizerVariable
impl Eq for FactorizerVariable
impl StructuralPartialEq for FactorizerVariable
Auto Trait Implementations§
impl Freeze for FactorizerVariable
impl RefUnwindSafe for FactorizerVariable
impl Send for FactorizerVariable
impl Sync for FactorizerVariable
impl Unpin for FactorizerVariable
impl UnwindSafe for FactorizerVariable
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T: ?Sized,
impl<T> BorrowMut<T> for Twhere
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<Q, K> Comparable<K> for Q
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impl<R, O, T> CopyOnto<ConsecutiveOffsetPairs<R, O>> for T
source§fn copy_onto(
self,
target: &mut ConsecutiveOffsetPairs<R, O>
) -> <ConsecutiveOffsetPairs<R, O> as Region>::Index
fn copy_onto( self, target: &mut ConsecutiveOffsetPairs<R, O> ) -> <ConsecutiveOffsetPairs<R, O> as Region>::Index
Copy self into the target container, returning an index that allows to
look up the corresponding read item.
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impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool
Compare self to
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