datafusion_common::cse

Struct CSE

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pub struct CSE<N, C: CSEController<Node = N>> { /* private fields */ }
Expand description

The main entry point of Common Subexpression Elimination.

CSE requires a CSEController, that defines how common subtrees of a particular TreeNode tree can be eliminated. The elimination process can be started with the CSE::extract_common_nodes() method.

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impl<N: TreeNode + HashNode + Clone + Eq, C: CSEController<Node = N>> CSE<N, C>

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pub fn new(controller: C) -> Self

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pub fn extract_common_nodes( &mut self, nodes_list: Vec<Vec<N>>, ) -> Result<FoundCommonNodes<N>>

Extracts common TreeNodes and rewrites nodes_list.

Returns FoundCommonNodes recording the result of the extraction.

Auto Trait Implementations§

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impl<N, C> Freeze for CSE<N, C>
where C: Freeze,

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impl<N, C> RefUnwindSafe for CSE<N, C>
where C: RefUnwindSafe, N: RefUnwindSafe,

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impl<N, C> Send for CSE<N, C>
where C: Send, N: Send,

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impl<N, C> Sync for CSE<N, C>
where C: Sync, N: Sync,

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impl<N, C> Unpin for CSE<N, C>
where C: Unpin, N: Unpin,

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impl<N, C> UnwindSafe for CSE<N, C>
where C: UnwindSafe, N: UnwindSafe,

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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, 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<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,