On 04/08/2014 04:09 PM, Alvaro Herrera wrote:
Elliot S wrote:
Is there a discussion somewhere regarding this line from the docs on
transaction isolation: "When you select the level Read Uncommitted
you really get Read Committed, and phantom reads are not possible in
the PostgreSQL implementation of Repeatable Read"? I get that RU is
the same as RC and why that is so, but why is RR mentioned in this
sentence and more importantly why does it claim phantom reads aren't
possible in RR despite the table above this paragraph clearly
stating they are? It looks like a documentation issue associated
with the true serialization mode introduced in 9.1.
I read that as saying that even though the standard defines repeatable
read as possibly having phantom reads, they don't occur in Postgres.
Oh - duh - that makes sense. Thanks. For some reason I couldn't make the
connection between the two clauses.
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