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JoinGraphBuilder

graphos_engine::query::optimizer::join_order

Struct JoinGraphBuilder 

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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

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