ORACLE FLASHBACK 查询（AS OF SCN/TIMESTAMP、VERSIONS BETWEEN） 迁移 tidb 8.5 怎么改

兼容性判定

怎么改

需按命中位置逐条评估改写

判定说明

能力矩阵暂未声明该特征，按未覆盖处理并降低置信度，建议 PoC 复核

库侧 / 应用侧路径

推荐路线：case_by_case。验证建议：判定条件：业务用途是误删恢复还是审计对账；替代方案能回放同一历史时点数据

规则样例

SELECT * FROM acct AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '1' HOUR) WHERE id = 1

SELECT ver_num, amt FROM bill VERSIONS BETWEEN SCN MINVALUE AND MAXVALUE WHERE id = 9

SELECT * FROM acct WHERE id = 1

参考来源

• https://docs.pingcap.com/zh/tidb/v8.5/sql-statement-overview/
• https://docs.pingcap.com/zh/tidb/stable/sql-mode/
• https://docs.oracle.com/en/database/oracle/oracle-database/19/adfns/flashback.html