ORACLE AT TIME ZONE 时区表达式 迁移 kingbasees V8 oracle 模式 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：时区名、夏令时边界和 timestamp with local time zone 展示规则必须抽样比对。

规则样例

SELECT order_ts AT TIME ZONE 'UTC' FROM orders

SELECT SYSTIMESTAMP AT TIME ZONE sessiontimezone FROM dual

SELECT order_ts FROM orders

参考来源

• https://help.kingbase.com.cn/v8/development/sql-plsql/sql/index.html
• https://bbs.kingbase.com.cn/kingbase-doc/v9/development/sql-plsql/index.html
• https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Datetime-Expressions.html