| From: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
|---|---|
| To: | Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: AS OF queries |
| Date: | 2017-12-20 13:12:30 |
| Message-ID: | 1513775550.2590.27.camel@cybertec.at |
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| Lists: | pgsql-hackers |
Konstantin Knizhnik wrote:
> I wonder if Postgres community is interested in supporting time travel
> queries in PostgreSQL (something like AS OF queries in Oracle:
> https://docs.oracle.com/cd/B14117_01/appdev.101/b10795/adfns_fl.htm)
> As far as I know something similar is now developed for MariaDB.
I think that would be a good thing to have that could make
the DBA's work easier - all the requests to restore a table
to the state from an hour ago.
> I failed to support AS OF clause (as in Oracle) because of shift-reduce
> conflicts with aliases,
> so I have to introduce new ASOF keyword. May be yacc experts can propose
> how to solve this conflict without introducing new keyword...
I think it would be highly desirable to have AS OF, because that's
the way the SQL standard has it.
Yours,
Laurenz Albe
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