Implementation of flashback query for PostgreSQL database compatible with Oracle Database

notes ： About the PostgreSQL Above realization Oracle Flashback function of database ( Flashback query Flashback table flashback drop …) This idea has been around for a long time , But in view of my ability Energy and physical condition It is too late to finish . During this period, many friends studied this function with me , But in the end, it's all because of various problems Didn't go on .Oracle The database flashback function spans large versions , It's also powerful stay PostgreSQL Database , You need to have a deep understanding of the database kernel The different underlying principles of the two databases will eventually affect their implementation strategies ,PostgreSQL The feature of mark deletion and in place insertion and the feature based on transaction snapshot row visibility can be developed PostgreSQL The premise of flashback query . This paper mainly introduces Implementation of flashback query An implementation scheme ！

Dear friends of Tencent cloud development community I have finished sorting out this document , Now it's on my CSDN In the blog ,PostgreSQL Learning experience and knowledge summary （ Fifty-five ）| About PostgreSQL Database compatibility Oracle Implementation scheme of database flashback query

Oracle Flashback function of database ( Flashback query Flashback table flashback drop …) Very powerful , There's a pair in the back PostgreSQL Interested in the database kernel PGers We can communicate with each other ！