人大金仓报错CONNECT BY clause required in this query block

原因是有关键字level，附数据库关键字，比较多
解决方案 要么替换掉level；要么用别名；要么`(反单引号)替换成"（双引号）

PDOStatement Object
(
    [queryString] => SELECT id, parent_id, level, lft, rgt
FROM a3bav_menu
WHERE id = 1 LIMIT 1
)
SQLSTATE[42601]: Syntax error: 7 ERROR: CONNECT BY clause required in this query block LINE 1: SELECT id, parent_id, level, lft, rgt ^stop pdo.php

alter system set exclude_reserved_words='level';