Alvaro Herrera wrote:

Most system catalogs use OIDs as primary keys. So they cannot just
disappear. But on user tables, there's not a lot of use for them IMHO.


Ok, I think it is about time it is stated more clearly in the documentation.

There's no internal row id on Postgres; having one would mean more
storage requirements. If you want one, you know where to get it ... if
not, you may as well save the space.


So, how does a index relate to a row ? There have to be some way of addressing a row ?

/BL

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