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【DM版本】: dm8 (20220xxx)
【操作系统】： centos7
【CPU】: 8
【问题描述】*：关键字作为别名会导致嵌套层次太深？ 不确定后面版本有没有修复。

-- 建表语句
CREATE TABLE "t_temp"
(
"id" BIGINT IDENTITY(1, 1) NOT NULL,
"NO" VARCHAR(255),
"STime" DATETIME(6),
"act3_stat" INTEGER
) ;

-- 查询的bug语句
SELECT HOUR(t."STime") AS "hour", COUNT(DISTINCT t."no") AS "no", MAX(t."STime") AS createTime
FROM "t_temp" t
GROUP BY "hour";

hour的别名改成其它的就正常，这个不确定是否修复了

SELECT HOUR(t."STime") AS "ahour", COUNT(DISTINCT t."no") AS "no", MAX(t."STime") AS createTime
FROM "t_temp" t
GROUP BY "ahour";