string sCypherSql = “schema”; 尝试了"schema"、“schema;”、":schema"、":schema;"， neo4j_result_stream_t *results = neo4j_run(pSession, sCypherSql.c_str(), neo4j_null); 都返回 neo4j_check_failure|-22|Invalid input ‘c’: expected ‘t/T’ or ‘e/E’ (line 1, column 2 (offset: 1)) statement faile 请问我怎样通过neo4j_run查询指定neo4j服务的模式索引情况呢？ Thank you!