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[Bug]:【GENERATED AS IDENTITY] B 库 identity + ON UPDATE CURRENT_TIMESTAMP 静默放行,identity 值被重生成 #8454
cloudsbreak创建于  23 天前关闭于  5 天前
cloudsbreak
cloudsbreak成员
23 天前 创建

测试类型

SQL功能

测试版本

7.0.0LTS

问题描述

B 模式库中,GENERATED AS IDENTITY 列与 ON UPDATE CURRENT_TIMESTAMP 共存时,应报错但静默放行。
PostgreSQL 17.4 实测:ON UPDATE CURRENT_TIMESTAMP 报 syntax error(PG 无此语法)。
openGauss B 库实测:建表成功,ON UPDATE 子句被偷换为 b_db_statement_startup_time(),UPDATE 后 identity 值被重生成(违反 identity 值稳定语义)。

操作系统和硬件信息

数据库版本: openGauss 7.0.0-LTS

测试环境

企业版单机

被测功能

GENERATED AS IDENTITY

预置条件

操作步骤

-- 需在 B 模式库执行
DROP TABLE IF EXISTS t_identity_onupdate CASCADE;
CREATE TABLE t_identity_onupdate(a int GENERATED ALWAYS AS IDENTITY ON UPDATE CURRENT_TIMESTAMP, b int);
-- 建表成功(预期应报错)
INSERT INTO t_identity_onupdate(b) VALUES(1);
SELECT a FROM t_identity_onupdate;
-- a = 1
UPDATE t_identity_onupdate SET b = 2;
SELECT a FROM t_identity_onupdate;
-- a = 2(identity 值被重生成,违反稳定语义)

预期输出

建表时报 syntax error(PostgreSQL 行为)
-- PostgreSQL 17.4 实测
CREATE TABLE t_identity_onupdate(a int GENERATED ALWAYS AS IDENTITY ON UPDATE CURRENT_TIMESTAMP, b int);
-- ERROR: syntax error at or near "ON"

实际输出

建表成功,UPDATE 后 identity 值从 1 变为 2

日志信息

建表成功,UPDATE 后 identity 值从 1 变为 2

提单组织

联合伙伴

测试代码

likedislike
cloudsbreakcloudsbreak成员
23 天前 添加了label:bug
opengauss_bot
opengauss_bot成员
23 天前 评论:

This issue requires an assignee. Since you haven't specified one, we've assigned TestManager as the default assignee for this issue.

likedislike
opengauss_botopengauss_bot成员
23 天前 将 TestManager 设为负责人
opengauss_bot
opengauss_bot成员
23 天前 评论:

Welcome To openGauss Community

Hey @cloudsbreak , thanks for your contribution to the community.

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likedislike
opengauss_botopengauss_bot成员
23 天前 添加了label:sig/SQLEngine
sungang14sungang14成员
17 天前 issue优先级由 无优先级 改变为 次要
sungang14sungang14成员
17 天前 关联了看板:openGauss 7.0.0-LTS
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11 天前 关联了pull request:fix GENERATED AS IDENTITY in B mode
ywzq1161327784ywzq1161327784成员
10 天前 issue状态由 待办的 改变为 待回归
cloudsbreak
cloudsbreak成员
5 天前 评论:

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likedislike
cloudsbreakcloudsbreak成员
5 天前 issue状态由 待回归 改变为 已验收
cloudsbreakcloudsbreak成员
5 天前 关闭了 issue