Re: Should we improve documentation on isolation levels?

AK <alkuzo(at)gmail(dot)com> wrote:

> The following is not precise:
>
> 13.2.1. Read Committed Isolation Level
>
> "Also note that two successive SELECT commands can see different data, even
> though they are within a single transaction, if other transactions commit
> changes during execution of the first SELECT."
>
> I think it should be re-worded as follows
>
> "Also note that two successive SELECT commands can see different data, even
> though they are within a single transaction, if other transactions commit
> after the first SELECT starts, and before the second SELECT starts."
>
> The reason: there could be other DML running between these two SELECTs.

That's a fair point.  I'll commit something to the master branch.
I don't think this rises to the level of a documentation bug that
needs to be back-patched.

--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company