ORACLE MERGE INTO 目标为内联视图 迁移 opengauss 6.0 A 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

MERGE 目标改实表

库侧 / 应用侧路径

推荐路线：case_by_case。验证建议：目标必须改实表，过滤条件前移到 ON/USING；需要验证原内联视图是否屏蔽了不可更新列或行。

规则样例

MERGE INTO (SELECT * FROM t WHERE flag = 'Y') d USING s ON (d.id=s.id) WHEN MATCHED THEN UPDATE SET d.v=s.v

MERGE INTO (SELECT id, v FROM target) t USING src s ON (t.id = s.id) WHEN MATCHED THEN UPDATE SET t.v = s.v

MERGE INTO target t USING src s ON (t.id = s.id) WHEN MATCHED THEN UPDATE SET t.v = s.v

参考来源

• https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/MERGE.html