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UnionParallelExecutor

oxirs_arq::executor_pipeline

Struct UnionParallelExecutor 

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pub struct UnionParallelExecutor;
Expand description

Executes independent SPARQL union branches in parallel and merges results.

Uses rayon for data-parallelism across branches. Deduplication uses the canonical string key of each BindingMap.

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impl UnionParallelExecutor

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pub fn execute_branches(branches: Vec<Vec<BindingMap>>) -> Vec<BindingMap>

Execute multiple pre-computed branches (each a Vec<BindingMap>) in parallel and merge the results.

Duplicates are removed using the canonical string representation of each BindingMap as the deduplication key.

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pub fn execute_optional( main: Vec<BindingMap>, optional: Vec<BindingMap>, ) -> Vec<BindingMap>

Compute the LEFT OUTER JOIN (OPTIONAL) of main rows with optional rows.

For each row in main:

  • If there is at least one compatible row in optional, emit all compatible merged rows.
  • Otherwise, emit the main row unchanged (preserving LEFT JOIN semantics).
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pub fn dedup(rows: Vec<BindingMap>) -> Vec<BindingMap>

Remove duplicate binding maps by canonical key.

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