grafeo_engine::query::optimizer::join_order

Struct JoinGraphBuilder

pub struct JoinGraphBuilder { /* private fields */ }

Expand description

Extracts a join graph from a query pattern.

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impl JoinGraphBuilder

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pub fn new() -> Self

Creates a new builder.

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pub fn add_relation( &mut self, variable: &str, relation: LogicalOperator, ) -> usize

Adds a base relation (scan).

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pub fn add_join_condition( &mut self, left_var: &str, right_var: &str, left_expr: LogicalExpression, right_expr: LogicalExpression, )

Adds a join condition between two variables.

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pub fn build(self) -> JoinGraph

Builds the join graph.

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impl Default for JoinGraphBuilder

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fn default() -> Self

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

Auto Trait Implementations§

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impl UnwindSafe for JoinGraphBuilder

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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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where T: ?Sized,

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

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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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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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