Module expr 

IR expression arena → DataFusion [Expr] lowering.

ExprLowerer is a pure, I/O-free transformation: it walks the ExprArena from a [GraphPlan] and produces DataFusion [Expr] values that can be consumed by operator lowering (#575, #576).

Structs

ExprLowerer

Lowers IR expressions from an ExprArena into DataFusion [Expr] values.

NodeShape

The shape of a node value materialized for a bare RETURN n (#785): the node’s resolved label (if known at lowering) and the persisted property columns its scan joined in (available as var_N.<prop>).

VarMap

Maps VarIds to DataFusion column name strings.

Enums

LoweringError

Errors that can occur when lowering an IR expression to DataFusion.

Functions

decode_het_scalar

Decode one tagged heterogeneous scalar into its logical value.

ir_literal_to_scalar

Convert an IrLiteral to a DataFusion ScalarValue.

scalar_to_ir_literal

Convert a DataFusion ScalarValue back to an IrLiteral for storage as a property value (#791 SET).