Crate graphforge_rel 

GraphForge Graph IR → DataFusion relational lowering.

Milestone status

• M12 #574 — IR expression lowering to DataFusion Expr
• M12 #573 — Wire SessionContext
• M12 #575 — Lower simple GraphOps (Filter, Project, …)
• M12 #576 — Lower NodeScan and Expand
• M12 #578 — Graph-native Extension stubs + explain_logical ← this issue

Re-exports

pub use expr::ExprLowerer;

pub use expr::LoweringError;

pub use expr::VarMap;

pub use expr::ir_literal_to_scalar;

pub use expr::scalar_to_ir_literal;

pub use lowerer::GraphPlanLowerer;

Modules

calendar

A proleptic-Gregorian calendar on i64 days-since-epoch (#1011).

expr

IR expression arena → DataFusion [Expr] lowering.

lowerer

GraphPlanLowerer — converts a GraphPlan operator pipeline into a DataFusion LogicalPlan.

temporal

Cypher temporal-value construction, evaluated at lowering time.

Structs

GraphPlan

A versioned, serialisable graph query plan.

Enums

GfError

All errors produced by GraphForge.

Functions

explain_logical

Render a GraphPlan’s optimised DataFusion LogicalPlan as indented text (with per-node schemas) for the explain LogicalPlan stage.

explain_logical_with

Like explain_logical but lowers with an optional OntologyHandle so that typed edge scans and variable-length expands can resolve relation-type names. Used by the logical-plan golden suite (which binds against a formal ontology for deterministic type IDs).

explain_logical_with_catalog

Like explain_logical_with but also threads a GraphCatalog so property accesses (e.g. n.name) resolve to their column names via the catalog’s PropId → name map instead of falling back to prop_<id> placeholders. Used by the engine facade’s explain, which lowers against the instance’s runtime catalog.

lower

Lower a GraphPlan to a DataFusion LogicalPlan.

lower_and_optimize

Lower a GraphPlan and run DataFusion’s analyzer + optimizer over it.

Type Aliases

LogicalPlan

A DataFusion datafusion::logical_expr::LogicalPlan produced by the relational lowering pass.