Module expr_eval 

Expression evaluation helper functions.

This module extracts high-complexity expression evaluation logic from the main executor to reduce cognitive complexity and improve maintainability.

Functions

cypher_eq

Deep equality comparison with Cypher-compliant numeric coercion and 3-valued logic. Returns Some(bool) for True/False, and None for Null/Unknown.

eval_binary_op

Evaluate a binary operation on two already-evaluated values.

eval_in_op

Evaluate IN operator.

eval_scalar_function

Evaluate a built-in scalar function.

eval_vector_distance

Evaluate vector distance between two vectors.

eval_vector_similarity

Evaluate vector similarity between two vectors (cosine similarity).

is_scalar_function

Check if a function name is a known scalar function (not aggregate).