Function resolve_condition_value

src/cypher/cypher.c:2545–2574

Resolve the actual property value for a condition from a binding */

/* Resolve the actual property value for a condition from a binding */
static const char *resolve_condition_value(const cbm_condition_t *c, binding_t *b) {
    /* Multi-arg scalar function LHS: coalesce(f.depth, 0) >= 2 (#874).
     * Evaluated through the same code path as RETURN projections. The value is
     * consumed by eval_condition before any other condition is resolved, so a
     * single thread-local buffer per call is safe. */
    if (c->func) {
        static _Thread_local char func_buf[CBM_SZ_512];
        cbm_return_item_t item = {0};
        item.variable = c->variable;
        item.property = c->property;
        item.func = c->func;
        item.args = c->args;
        item.arg_count = c->arg_count;
        return eval_multiarg_func(b, &item, func_buf, sizeof(func_buf));
    }

    cbm_edge_t *e = binding_get_edge(b, c->variable);
    if (e) {
        return edge_prop(e, c->property);
    }
    cbm_node_t *n = binding_get(b, c->variable);
    if (!n) {
        return NULL; /* unbound variable */
    }
    if (c->property) {
        return node_prop(n, c->property, b->store);
    }
    /* Bare alias (e.g. post-WITH virtual var) — use node name directly */
    return n->name ? n->name : "";
}

/* Evaluate a comparison operator between actual and expected strings. */
static bool eval_comparison_op(const char *op, const char *actual, const char *expected) {