Function collect_pattern_vars

src/cypher/cypher.c:3809–3824

Project RETURN * — all bound variable properties */ Collect all variable names from query patterns */

/* Project RETURN * — all bound variable properties */
/* Collect all variable names from query patterns */
static int collect_pattern_vars(cbm_query_t *q, const char **vars, int max_vars) {
    int vc = 0;
    for (int pi = 0; pi < q->pattern_count; pi++) {
        for (int ni = 0; ni < q->patterns[pi].node_count && vc < max_vars; ni++) {
            if (q->patterns[pi].nodes[ni].variable) {
                vars[vc++] = q->patterns[pi].nodes[ni].variable;
            }
        }
        for (int ri = 0; ri < q->patterns[pi].rel_count && vc < max_vars; ri++) {
            if (q->patterns[pi].rels[ri].variable) {
                vars[vc++] = q->patterns[pi].rels[ri].variable;
            }
        }
    }
    return vc;
}

/* Build star-projection columns: var.name, var.qualified_name, var.label, var.file_path */
static void build_star_columns(result_builder_t *rb, const char **vars, int vc) {